Appendix A1.---Site statistics for inorganic constituent concentrations
in samples collected and analyzed by the U.S. Geological Survey.

\[SR, secondary road; NWIS, National Water Information System; wat.,
water; filt., filtered; unf., unfiltered; mg/L, milligram per liter;
\--, value is below the detection level and(or) cannot be calculated;
\*, value is estimated by using a log-probability regression to predict
the values of data below the detection limit; ug/L, microgram per
liter\]

Table of Contents

[**Eno River at Hillsborough (initial site)**
3](#eno-river-at-hillsboroughinitial-site-october-1988september-1989)

[**Eno River at Hillsborough (replaced initial site)**
5](#__RefHeading___Toc50352689)

[**Eno River near Durham** 8](#__RefHeading___Toc50352690)

[**Eno River near Weaver** 10](#__RefHeading___Toc50352691)

[**Little River at SR 1461 near Orange Factory**
13](#__RefHeading___Toc50352692)

[**Little River Reservoir at dam near Bahama**
16](#__RefHeading___Toc50352693)

[**Little River below dam near Fairntosh**
19](#__RefHeading___Toc50352694)

[**Flat River at Bahama** 21](#__RefHeading___Toc50352695)

[**Lake Michie at dam near Bahama** 24](#__RefHeading___Toc50352696)

[**Flat River at dam near Bahama** 27](#__RefHeading___Toc50352697)

[**Knap of Reeds Creek near Butner** 30](#__RefHeading___Toc50352698)

[**Ellerbe Creek near Gorman** 32](#__RefHeading___Toc50352699)

[**Falls Lake at I-85 near Redwood** 35](#__RefHeading___Toc50352700)

[**Little Lick Creek above SR 1814 near Oak Grove**
38](#__RefHeading___Toc50352701)

[**Falls Lake at N.C. 50 near Sandy Plain**
41](#__RefHeading___Toc50352702)

[**Falls Lake at N.C. 98 near Bayleaf** 44](#__RefHeading___Toc50352703)

[**Falls Lake above dam at Falls** 47](#__RefHeading___Toc50352704)

[**Neuse River near Falls** 50](#__RefHeading___Toc50352705)

[**Neuse River at Smithfield** 51](#__RefHeading___Toc50352706)

[**Swift Creek near Apex
54**](#swift-creek-near-apex-october-1988june-1995)

[**Lake Benson at dam near Garner
57**](#_02087701__Lake_Benson_at_dam_near_G)

[**Cane Creek near Orange Grove
60**](#_02096846__Cane_Creek_near_Orange_Gr)

[**Cane Creek Reservoir at dam near White Cross**
63](#__RefHeading___Toc50352710)

[**Haw River near Bynum** 66](#__RefHeading___Toc50352711)

[**B.E. Jordan Lake, Haw River arm above B.E. Jordan dam**
69](#__RefHeading___Toc50352712)

[**New Hope Creek near Blands** 72](#__RefHeading___Toc50352713)

[**Northeast Creek at SR 1100 near Genlee**
75](#__RefHeading___Toc50352714)

[**Morgan Creek near White Cross** 78](#__RefHeading___Toc50352715)

[**University Lake at the dam near Chapel Hill**
81](#__RefHeading___Toc50352716)

[**Morgan Creek near Farrington** 84](#__RefHeading___Toc50352717)

[**Jordan Lake at buoy 12 at Farrington**
86](#__RefHeading___Toc50352718)

[**Jordan Lake at buoy 9 near Farrington**
89](#__RefHeading___Toc50352719)

[**White Oak Creek at Green Level** 91](#__RefHeading___Toc50352720)

[**B.E. Jordan Lake above U.S. 64 at Wilsonville**
93](#__RefHeading___Toc50352721)

[**Jordan Lake at buoy 7 below U.S. 64 near Griffins Crossroads**
96](#__RefHeading___Toc50352722)

[**B.E. Jordan Lake at Bells Landing near Griffins Crossroads**
98](#__RefHeading___Toc50352723)

[**Haw River below B. Everett Jordan dam near Moncure**
101](#__RefHeading___Toc50352724)

[**Deep River at Carbonton** 102](#__RefHeading___Toc50352725)

[Cape Fear River at N.C. 42 near Brickhaven
104](#__RefHeading___Toc50352726)

<table>
<colgroup>
<col style="width: 7%" />
<col style="width: 24%" />
<col style="width: 6%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 6%" />
<col style="width: 8%" />
<col style="width: 0%" />
<col style="width: 7%" />
<col style="width: 8%" />
<col style="width: 8%" />
<col style="width: 8%" />
</colgroup>
<thead>
<tr class="header">
<th rowspan="2"><strong>NWIS Param-eter<br />
code</strong></th>
<th rowspan="2"><strong>Constituent name</strong></th>
<th rowspan="2">Sample size</th>
<th rowspan="2">Maximum</th>
<th rowspan="2">Minimum</th>
<th rowspan="2">Mean</th>
<th colspan="6"><strong>Percentile</strong></th>
</tr>
<tr class="odd">
<th colspan="2">95th</th>
<th>75th</th>
<th>50th</th>
<th><strong>25th</strong></th>
<th><strong>5th</strong></th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td colspan="12"><h3
id="eno-river-at-hillsboroughinitial-site-october-1988september-1989">0208491605
Eno River at Hillsborough—initial site (October 1988–September
1989)</h3></td>
</tr>
<tr class="even">
<td>00080</td>
<td>Color, wat., filt., platinum cobalt units</td>
<td>12</td>
<td>170.000</td>
<td>30.000</td>
<td>83.167</td>
<td>170.000</td>
<td colspan="2">110.000</td>
<td>80.000</td>
<td>51.250</td>
<td>30.000</td>
</tr>
<tr class="odd">
<td>00400</td>
<td>pH, wat., unf., field, standard units</td>
<td>12</td>
<td>7.100</td>
<td>5.700</td>
<td>6.175</td>
<td>7.100</td>
<td colspan="2">6.625</td>
<td>5.950</td>
<td>5.800</td>
<td>5.700</td>
</tr>
<tr class="even">
<td>00403</td>
<td>pH, wat., unf., laboratory, standard units</td>
<td>12</td>
<td>8.100</td>
<td>6.900</td>
<td>7.442</td>
<td>8.100</td>
<td colspan="2">7.775</td>
<td>7.300</td>
<td>7.200</td>
<td>6.900</td>
</tr>
<tr class="odd">
<td>90095</td>
<td>Specific conductance, wat., unf., laboratory, microsiemens per
centimeter at 25 degrees Celsius</td>
<td>12</td>
<td>87.000</td>
<td>65.000</td>
<td>77.500</td>
<td>87.000</td>
<td colspan="2">83.000</td>
<td>81.500</td>
<td>68.250</td>
<td>65.000</td>
</tr>
<tr class="even">
<td>00095</td>
<td>Specific conductance, wat., unf., microsiemens per centimeter at 25
degrees Celsius</td>
<td>12</td>
<td>138.000</td>
<td>63.000</td>
<td>79.000</td>
<td>138.000</td>
<td colspan="2">80.000</td>
<td>78.000</td>
<td>65.750</td>
<td>63.000</td>
</tr>
<tr class="odd">
<td>00900</td>
<td>Hardness, wat., unf., mg/L as calcium carbonate</td>
<td>12</td>
<td>28.000</td>
<td>20.000</td>
<td>25.083</td>
<td>28.000</td>
<td colspan="2">27.000</td>
<td>26.000</td>
<td>22.250</td>
<td>20.000</td>
</tr>
<tr class="even">
<td>00915</td>
<td>Calcium, wat., filt., mg/L</td>
<td>12</td>
<td>6.700</td>
<td>4.600</td>
<td>5.850</td>
<td>6.700</td>
<td colspan="2">6.375</td>
<td>5.950</td>
<td>5.175</td>
<td>4.600</td>
</tr>
<tr class="odd">
<td>00925</td>
<td>Magnesium, wat., filt., mg/L</td>
<td>12</td>
<td>3.000</td>
<td>2.100</td>
<td>2.558</td>
<td>3.000</td>
<td colspan="2">2.775</td>
<td>2.600</td>
<td>2.300</td>
<td>2.100</td>
</tr>
<tr class="even">
<td>00935</td>
<td>Potassium, wat., filt., mg/L</td>
<td>12</td>
<td>2.400</td>
<td>1.300</td>
<td>1.725</td>
<td>2.400</td>
<td colspan="2">2.050</td>
<td>1.600</td>
<td>1.400</td>
<td>1.300</td>
</tr>
<tr class="odd">
<td>00931</td>
<td>Sodium adsorption ratio, wat., number</td>
<td>12</td>
<td>0.500</td>
<td>0.300</td>
<td>0.392</td>
<td>0.500</td>
<td colspan="2">0.400</td>
<td>0.400</td>
<td>0.325</td>
<td>0.300</td>
</tr>
<tr class="even">
<td>00930</td>
<td>Sodium, wat., filt., mg/L</td>
<td>12</td>
<td>5.800</td>
<td>3.300</td>
<td>4.492</td>
<td>5.800</td>
<td colspan="2">4.975</td>
<td>4.450</td>
<td>4.025</td>
<td>3.300</td>
</tr>
<tr class="odd">
<td>00932</td>
<td>Sodium, wat., percent in equivalents of major cations</td>
<td>12</td>
<td>31.000</td>
<td>22.000</td>
<td>26.250</td>
<td>31.000</td>
<td colspan="2">28.000</td>
<td>26.000</td>
<td>24.250</td>
<td>22.000</td>
</tr>
<tr class="even">
<td>90410</td>
<td>Acid neutralizing capacity, wat., unf., fixed endpoint (pH 4.5)
titration, laboratory, mg/L as calcium carbonate</td>
<td>12</td>
<td>31.000</td>
<td>17.000</td>
<td>23.500</td>
<td>31.000</td>
<td colspan="2">25.000</td>
<td>24.000</td>
<td>20.250</td>
<td>17.000</td>
</tr>
<tr class="odd">
<td>00940</td>
<td>Chloride, wat., filt., mg/L</td>
<td>12</td>
<td>6.000</td>
<td>4.000</td>
<td>4.917</td>
<td>6.000</td>
<td colspan="2">5.500</td>
<td>4.800</td>
<td>4.225</td>
<td>4.000</td>
</tr>
<tr class="even">
<td>00950</td>
<td>Fluoride, wat., filt., mg/L</td>
<td>12</td>
<td>0.200</td>
<td>0.100</td>
<td>0.117</td>
<td>0.200</td>
<td colspan="2">0.100</td>
<td>0.100</td>
<td>0.100</td>
<td>0.100</td>
</tr>
<tr class="odd">
<td>00955</td>
<td>Silica, wat., filt., mg/L</td>
<td>12</td>
<td>16.000</td>
<td>9.800</td>
<td>12.567</td>
<td>16.000</td>
<td colspan="2">14.000</td>
<td>12.500</td>
<td>11.000</td>
<td>9.800</td>
</tr>
<tr class="even">
<td>00945</td>
<td>Sulfate, wat., filt., mg/L</td>
<td>12</td>
<td>12.000</td>
<td>3.000</td>
<td>6.933</td>
<td>12.000</td>
<td colspan="2">10.750</td>
<td>5.450</td>
<td>4.000</td>
<td>3.000</td>
</tr>
<tr class="odd">
<td>99890</td>
<td>Sulfate, wat., filt., uncorrected, mg/L</td>
<td>2</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>70300</td>
<td>Residue on evaporation, dried at 180 degrees Celsius, wat., filt.,
mg/L</td>
<td>12</td>
<td>67.000</td>
<td>42.000</td>
<td>56.000</td>
<td>67.000</td>
<td colspan="2">63.250</td>
<td>55.500</td>
<td>51.250</td>
<td>42.000</td>
</tr>
<tr class="odd">
<td>00608</td>
<td>Ammonia, wat., filt., mg/L as nitrogen</td>
<td>12</td>
<td>0.120</td>
<td>--</td>
<td>0.049*</td>
<td>*0.120</td>
<td colspan="2">*0.057</td>
<td>*0.045</td>
<td>*0.030</td>
<td>*0.014</td>
</tr>
<tr class="even">
<td>00623</td>
<td>Ammonia plus organic nitrogen, wat., filt., mg/L as nitrogen</td>
<td>10</td>
<td>0.800</td>
<td>0.400</td>
<td>0.530</td>
<td>0.800</td>
<td colspan="2">0.625</td>
<td>0.500</td>
<td>0.400</td>
<td>0.400</td>
</tr>
<tr class="odd">
<td>00625</td>
<td>Ammonia plus organic nitrogen, wat., unf., mg/L as nitrogen</td>
<td>12</td>
<td>1.100</td>
<td>0.400</td>
<td>0.625</td>
<td>1.100</td>
<td colspan="2">0.675</td>
<td>0.600</td>
<td>0.500</td>
<td>0.400</td>
</tr>
<tr class="even">
<td>00610</td>
<td>Ammonia, wat., unf., mg/L as nitrogen</td>
<td>12</td>
<td>0.130</td>
<td>--</td>
<td>0.052*</td>
<td>*0.130</td>
<td colspan="2">*0.078</td>
<td>*0.040</td>
<td>*0.020</td>
<td>*0.009</td>
</tr>
<tr class="odd">
<td>00620</td>
<td>Nitrate, wat., unf., mg/L as nitrogen</td>
<td>5</td>
<td>0.870</td>
<td>0.190</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
</tbody>
</table>

  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                           **Constituent     Sample   Maximum    Minimum               Mean      **Percentile**                                          
  code**                                       name**            size                                                                                                        
  -------------------------------------------- ----------------- -------- ---------- ---------- ---------- --------- ---------------- ---------- ------ --------- ---------- ---------
                                                                                                                     95th                        75th   50th      **25th**   **5th**

  00631                                        Nitrite plus      12       0.910      \--                   0.296\*   \*0.910          \*0.270           \*0.240   \*0.183    \*0.066
                                               nitrate, wat.,                                                                                                                
                                               filt., mg/L as                                                                                                                
                                               nitrogen                                                                                                                      

  00630                                        Nitrite plus      12       0.900      \--                   0.305\*   \*0.900          \*0.300           \*0.200   \*0.200    \*0.065
                                               nitrate, wat.,                                                                                                                
                                               unf., mg/L as                                                                                                                 
                                               nitrogen                                                                                                                      

  00615                                        Nitrite, wat.,    12       0.030      \--                   0.008\*   \*0.030          \*0.010           \*0.005   \*0.002    \*0.001
                                               unf., mg/L as                                                                                                                 
                                               nitrogen                                                                                                                      

  00605                                        Organic nitrogen, 11       1.100      0.320                 0.576     1.100            0.580             0.560     0.480      0.320
                                               wat., unf., mg/L                                                                                                              

  00666                                        Phosphorus, wat., 12       0.040      0.010                 0.028     0.040            0.037             0.030     0.020      0.010
                                               filt., mg/L                                                                                                                   

  00671                                        Orthophosphate,   12       0.040      \--                   0.019\*   \*0.040          \*0.030           \*0.020   \*0.010    \*0.005
                                               wat., filt., mg/L                                                                                                             
                                               as phosphorus                                                                                                                 

  70507                                        Orthophosphate,   12       0.070      \--                   0.023\*   \*0.070          \*0.030           \*0.020   \*0.010    \*0.004
                                               wat., unf., mg/L                                                                                                              
                                               as phosphorus                                                                                                                 

  00665                                        Phosphorus, wat., 12       0.080      0.030                 0.049     0.080            0.060             0.050     0.030      0.030
                                               unf., mg/L                                                                                                                    

  00680                                        Organic carbon,   12       8.100      5.000                 6.383     8.100            7.350             6.300     5.225      5.000
                                               wat., unf., mg/L                                                                                                              

  01105                                        Aluminum, wat.,   4        4200.000   160.000               \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01002                                        Arsenic, wat.,    4        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf., ug/L                                                                                                                    

  01027                                        Cadmium, wat.,    4        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf., ug/L                                                                                                                    

  01034                                        Chromium, wat.,   4        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01037                                        Cobalt, wat.,     4        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01045                                        Iron, wat., unf., 4        7400.000   1000.000              \--       \--              \--               \--       \--        \--
                                               recoverable, ug/L                                                                                                             

  01055                                        Manganese, wat.,  4        1200.000   110.000               \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  71900                                        Mercury, wat.,    4        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01147                                        Selenium, wat.,   4        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf., ug/L                                                                                                                    

  01077                                        Silver, wat.,     3        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  **02085000**[]{#__RefHeading___Toc50352689                                                                                                                                 
  .anchor} **Eno River at                                                                                                                                                    
  Hillsborough---replaced initial site                                                                                                                                       
  (October 1989--August 2001)**                                                                                                                                              

  00061                                        Discharge,        110      9120.000   0.560      138.971              291.500          53.250            26.000    5.975      1.900
                                               instantaneous,                                                                                                                
                                               cubic feet per                                                                                                                
                                               second                                                                                                                        

  00080                                        Color, wat.,      108      350.000    7.000      62.880               180.000          65.000            52.500    35.250     23.350
                                               filt., platinum                                                                                                               
                                               cobalt units                                                                                                                  

  00300                                        Dissolved oxygen, 110      16.000     3.800      8.668                12.745           10.800            8.475     6.575      5.100
                                               wat., unf., mg/L                                                                                                              

  00301                                        Dissolved oxygen, 108      139.000    44.000     84.231               109.000          95.750            86.000    71.250     59.000
                                               wat., unf.,                                                                                                                   
                                               percent of                                                                                                                    
                                               saturation                                                                                                                    

  00400                                        pH, wat., unf.,   110      7.710      4.650      6.870                7.357            7.100             6.900     6.707      6.300
                                               field, standard                                                                                                               
                                               units                                                                                                                         

  00403                                        pH, wat., unf.,   109      8.200      4.100      7.291                7.900            7.500             7.300     7.100      6.750
                                               laboratory,                                                                                                                   
                                               standard units                                                                                                                

  90095                                        Specific          109      310.000    40.000     94.587               126.000          107.000           89.000    81.000     66.500
                                               conductance,                                                                                                                  
                                               wat., unf.,                                                                                                                   
                                               laboratory,                                                                                                                   
                                               microsiemens per                                                                                                              
                                               centimeter at 25                                                                                                              
                                               degrees Celsius                                                                                                               

  00095                                        Specific          109      304.000    33.000     91.191               120.000          104.000           86.000    77.150     64.500
                                               conductance,                                                                                                                  
                                               wat., unf.,                                                                                                                   
                                               microsiemens per                                                                                                              
                                               centimeter at 25                                                                                                              
                                               degrees Celsius                                                                                                               

  00900                                        Hardness, wat.,   109      44.000     12.000     28.780               38.500           32.500            28.000    25.000     20.000
                                               unf., mg/L as                                                                                                                 
                                               calcium carbonate                                                                                                             

  00915                                        Calcium, wat.,    109      11.000     2.900      6.906                9.550            7.850             6.800     5.850      4.650
                                               filt., mg/L                                                                                                                   

  00925                                        Magnesium, wat.,  109      4.000      1.100      2.798                3.600            3.150             2.800     2.500      2.000
                                               filt., mg/L                                                                                                                   

  00935                                        Potassium, wat.,  109      3.500      1.000      1.647                2.400            1.900             1.600     1.200      1.050
                                               filt., mg/L                                                                                                                   

  00931                                        Sodium adsorption 109      1.000      0.200      0.437                0.600            0.500             0.400     0.400      0.300
                                               ratio, wat.,                                                                                                                  
                                               number                                                                                                                        

  00930                                        Sodium, wat.,     109      16.000     1.400      5.402                8.650            6.050             5.100     4.600      3.650
                                               filt., mg/L                                                                                                                   

  00932                                        Sodium, wat.,     109      51.000     17.000     27.404               34.500           28.000            27.000    25.000     23.500
                                               percent in                                                                                                                    
                                               equivalents of                                                                                                                
                                               major cations                                                                                                                 

  99430                                        Carbonate, wat.,  50       51.000     13.000     26.920               46.700           31.250            27.000    21.750     14.000
                                               unf., incremental                                                                                                             
                                               titration, field,                                                                                                             
                                               mg/L as calcium                                                                                                               
                                               carbonate                                                                                                                     

  90410                                        Acid neutralizing 107      46.000     9.200      28.217               39.200           34.000            28.000    24.000     17.400
                                               capacity, wat.,                                                                                                               
                                               unf., fixed                                                                                                                   
                                               endpoint (pH 4.5)                                                                                                             
                                               titration,                                                                                                                    
                                               laboratory, mg/L                                                                                                              
                                               as calcium                                                                                                                    
                                               carbonate                                                                                                                     

  29801                                        Alkalinity, wat., 1        34.000     \--        \--                  \--              \--               \--       \--        \--
                                               filt., fixed                                                                                                                  
                                               endpoint (pH 4.5)                                                                                                             
                                               titration,                                                                                                                    
                                               laboratory, mg/L                                                                                                              
                                               as calcium                                                                                                                    
                                               carbonate                                                                                                                     

  39086                                        Alkalinity, wat., 4        62.000     10.000     \--                  \--              \--               \--       \--        \--
                                               filt.,                                                                                                                        
                                               incremental                                                                                                                   
                                               titration, field,                                                                                                             
                                               mg/L as calcium                                                                                                               
                                               carbonate                                                                                                                     

  00410                                        Acid neutralizing 55       50.000     15.000     27.618               46.000           31.000            27.000    22.000     16.000
                                               capacity, wat.,                                                                                                               
                                               unf., fixed                                                                                                                   
                                               endpoint (pH 4.5)                                                                                                             
                                               titration, field,                                                                                                             
                                               mg/L as calcium                                                                                                               
                                               carbonate                                                                                                                     

  00419                                        Acid neutralizing 17       52.000     15.000     28.647               52.000           33.000            27.000    25.000     15.000
                                               capacity, wat.,                                                                                                               
                                               unf., incremental                                                                                                             
                                               titration, field,                                                                                                             
                                               mg/L as calcium                                                                                                               
                                               carbonate                                                                                                                     

  99440                                        Bicarbonate,      67       63.000     16.000     33.340               58.200           39.000            33.000    27.000     17.400
                                               wat., unf.,                                                                                                                   
                                               incremental                                                                                                                   
                                               titration, field,                                                                                                             
                                               mg/L                                                                                                                          

  00453                                        Bicarbonate,      2        76.000     12.200     \--                  \--              \--               \--       \--        \--
                                               wat., filt.,                                                                                                                  
                                               incremental                                                                                                                   
                                               titration, field,                                                                                                             
                                               mg/L                                                                                                                          

  99445                                        Carbonate, wat.,  12       0.000      \--        \--                  \--              \--               \--       \--        \--
                                               unf., incremental                                                                                                             
                                               titration, field,                                                                                                             
                                               mg/L                                                                                                                          

  00940                                        Chloride, wat.,   105      15.000     1.600      5.592                11.700           5.800             5.200     4.750      3.630
                                               filt., mg/L                                                                                                                   

  00950                                        Fluoride, wat.,   105      0.300      \--        0.095\*              \*0.200          \*0.100           \*0.081   \*0.056    \*0.033
                                               filt., mg/L                                                                                                                   

  00955                                        Silica, wat.,     105      16.000     4.800      12.037               15.000           13.000            12.000    11.000     7.660
                                               filt., mg/L                                                                                                                   

  00945                                        Sulfate, wat.,    105      170.000    2.400      7.102                8.340            6.400             5.400     4.550      3.130
                                               filt., mg/L                                                                                                                   

  99890                                        Sulfate, wat.,    5        \--        \--        \--                  \--              \--               \--       \--        \--
                                               filt.,                                                                                                                        
                                               uncorrected, mg/L                                                                                                             

  70300                                        Residue on        103      212.000    14.000     68.612               90.000           75.000            66.000    60.000     46.200
                                               evaporation,                                                                                                                  
                                               dried at 180                                                                                                                  
                                               degrees Celsius,                                                                                                              
                                               wat., filt., mg/L                                                                                                             

  00608                                        Ammonia, wat.,    108      0.170      \--        0.042\*              \*0.114          \*0.060           \*0.040   \*0.015    \*0.003
                                               filt., mg/L as                                                                                                                
                                               nitrogen                                                                                                                      

  00623                                        Ammonia plus      75       0.700      \--        0.321\*              \*0.620          \*0.400           \*0.300   \*0.200    \*0.136
                                               organic nitrogen,                                                                                                             
                                               wat., filt., mg/L                                                                                                             
                                               as nitrogen                                                                                                                   

  00625                                        Ammonia plus      108      2.900      0.200      0.404                0.700            0.500             0.300     0.300      0.200
                                               organic nitrogen,                                                                                                             
                                               wat., unf., mg/L                                                                                                              
                                               as nitrogen                                                                                                                   

  00610                                        Ammonia, wat.,    31       0.130      \--        0.058\*              \*0.125          \*0.088           \*0.050   \*0.032    \*0.010
                                               unf., mg/L as                                                                                                                 
                                               nitrogen                                                                                                                      

  00620                                        Nitrate, wat.,    14       0.540      0.130      0.305                0.540            0.423             0.260     0.190      0.130
                                               unf., mg/L as                                                                                                                 
                                               nitrogen                                                                                                                      

  00631                                        Nitrite plus      108      0.600      0.050      0.285                0.461            0.347             0.290     0.210      0.100
                                               nitrate, wat.,                                                                                                                
                                               filt., mg/L as                                                                                                                
                                               nitrogen                                                                                                                      

  00630                                        Nitrite plus      30       0.580      0.098      0.307                0.536            0.400             0.300     0.222      0.121
                                               nitrate, wat.,                                                                                                                
                                               unf., mg/L as                                                                                                                 
                                               nitrogen                                                                                                                      

  00613                                        Nitrite, wat.,    96       0.030      \--        0.006\*              \*0.020          \*0.006           \*0.003   \*0.002    \*0.001
                                               filt., mg/L as                                                                                                                
                                               nitrogen                                                                                                                      

  00615                                        Nitrite, wat.,    31       0.040      \--        0.010\*              \*0.040          \*0.010           \*0.006   \*0.003    \*0.001
                                               unf., mg/L as                                                                                                                 
                                               nitrogen                                                                                                                      

  00605                                        Organic nitrogen, 96       2.800      0.130      0.376                0.732            0.440             0.315     0.240      0.170
                                               wat., unf., mg/L                                                                                                              

  00666                                        Phosphorus, wat., 76       1.200      \--        0.034\*              \*0.054          \*0.020           \*0.012   \*0.010    \*0.003
                                               filt., mg/L                                                                                                                   

  00671                                        Orthophosphate,   108      0.060      \--        0.009\*              \*0.031          \*0.010           \*0.005   \*0.002    \*0.001
                                               wat., filt., mg/L                                                                                                             
                                               as phosphorus                                                                                                                 

  70507                                        Orthophosphate,   31       0.200      \--        0.026\*              \*0.137          \*0.030           \*0.015   \*0.006    \*0.002
                                               wat., unf., mg/L                                                                                                              
                                               as phosphorus                                                                                                                 

  00665                                        Phosphorus, wat., 107      0.210      \--        0.043\*              \*0.127          \*0.043           \*0.030   \*0.024    \*0.010
                                               unf., mg/L                                                                                                                    

  00681                                        Organic carbon,   1        4.000      \--        \--                  \--              \--               \--       \--        \--
                                               wat., filt., mg/L                                                                                                             

  00689                                        Organic carbon,   1        0.200      \--        \--                  \--              \--               \--       \--        \--
                                               suspended                                                                                                                     
                                               sediment, total,                                                                                                              
                                               mg/L                                                                                                                          

  00680                                        Organic carbon,   108      15.000     2.700      5.722                11.000           6.600             4.900     4.200      3.200
                                               wat., unf., mg/L                                                                                                              

  31625                                        Fecal coliform,   1        270.000    \--        \--                  \--              \--               \--       \--        \--
                                               M-FC MF (0.7                                                                                                                  
                                               micron) method,                                                                                                               
                                               wat., colonies                                                                                                                
                                               per 100                                                                                                                       
                                               milliliters                                                                                                                   

  01105                                        Aluminum, wat.,   39       2100.000   50.000     418.451              1500.000         540.000           230.000   110.000    50.600
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01002                                        Arsenic, wat.,    40       \--        \--        \--                  \--              \--               \--       \--        \--
                                               unf., ug/L                                                                                                                    

  01027                                        Cadmium, wat.,    40       \--        \--        \--                  \--              \--               \--       \--        \--
                                               unf., ug/L                                                                                                                    

  01034                                        Chromium, wat.,   40       8.000      \--        1.119\*              \*3.950          \*1.000           \*0.733   \*0.375    \*0.145
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01037                                        Cobalt, wat.,     40       3.000      \--        0.839\*              \*3.000          \*1.000           \*0.578   \*0.326    \*0.133
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01042                                        Copper, wat.,     40       9.000      \--        2.725\*              \*7.000          \*4.000           \*2.000   \*1.000    \*0.574
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01046                                        Iron, wat.,       1        270.000    \--        \--                  \--              \--               \--       \--        \--
                                               filt., ug/L                                                                                                                   

  01045                                        Iron, wat., unf., 40       3600.000   80.000     1233.425             3190.000         1400.000          930.000   792.500    394.000
                                               recoverable, ug/L                                                                                                             

  01051                                        Lead, wat., unf., 40       5.000      \--        1.604\*              \*5.000          \*2.000           \*1.000   \*0.592    \*0.237
                                               recoverable, ug/L                                                                                                             

  01056                                        Manganese, wat.,  1        190.000    \--        \--                  \--              \--               \--       \--        \--
                                               filt., ug/L                                                                                                                   

  01055                                        Manganese, wat.,  40       590.000    50.000     180.682              465.900          232.000           150.000   104.000    60.500
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  71900                                        Mercury, wat.,    39       \--        \--        \--                  \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01062                                        Molybdenum, wat., 40       \--        \--        \--                  \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01067                                        Nickel, wat.,     40       7.000      \--        1.031\*              \*2.950          \*1.000           \*0.634   \*0.350    \*0.143
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01147                                        Selenium, wat.,   40       \--        \--        \--                  \--              \--               \--       \--        \--
                                               unf., ug/L                                                                                                                    

  01077                                        Silver, wat.,     40       \--        \--        \--                  \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01092                                        Zinc, wat., unf., 40       50.000     \--        5.606\*              \*20.000         \*6.160           \*2.660   \*1.233    \*0.372
                                               recoverable, ug/L                                                                                                             

  80154                                        Suspended         105      660.000    1.000      27.348               88.610           20.000            10.000    6.000      3.300
                                               sediment                                                                                                                      
                                               concentration,                                                                                                                
                                               mg/L                                                                                                                          

  **02085070**[]{#__RefHeading___Toc50352690                                                                                                                                 
  .anchor} **Eno River near Durham (October                                                                                                                                  
  1988--April 1995)**                                                                                                                                                        

  00061                                        Discharge,        18       411.000    4.100                 101.900   411.000          145.000           30.500    12.750     4.100
                                               instantaneous,                                                                                                                
                                               cubic feet per                                                                                                                
                                               second                                                                                                                        

  00080                                        Color, wat.,      2        150.000    23.000                \--       \--              \--               \--       \--        \--
                                               filt., platinum                                                                                                               
                                               cobalt units                                                                                                                  

  00300                                        Dissolved oxygen, 19       12.800     6.200                 9.442     12.800           10.400            9.600     8.000      6.200
                                               wat., unf., mg/L                                                                                                              

  00301                                        Dissolved oxygen, 2        101.000    90.000                \--       \--              \--               \--       \--        \--
                                               wat., unf.,                                                                                                                   
                                               percent of                                                                                                                    
                                               saturation                                                                                                                    

  00400                                        pH, wat., unf.,   19       7.500      6.100                 7.125     7.500            7.420             7.200     7.000      6.100
                                               field, standard                                                                                                               
                                               units                                                                                                                         

  00403                                        pH, wat., unf.,   2        7.900      7.200                 \--       \--              \--               \--       \--        \--
                                               laboratory,                                                                                                                   
                                               standard units                                                                                                                

  90095                                        Specific          2        277.000    80.000                \--       \--              \--               \--       \--        \--
                                               conductance,                                                                                                                  
                                               wat., unf.,                                                                                                                   
                                               laboratory,                                                                                                                   
                                               microsiemens per                                                                                                              
                                               centimeter at 25                                                                                                              
                                               degrees Celsius                                                                                                               

  00095                                        Specific          19       540.000    58.000                167.947   540.000          173.000           128.000   85.000     58.000
                                               conductance,                                                                                                                  
                                               wat., unf.,                                                                                                                   
                                               microsiemens per                                                                                                              
                                               centimeter at 25                                                                                                              
                                               degrees Celsius                                                                                                               

  00900                                        Hardness, wat.,   2        33.000     22.000                \--       \--              \--               \--       \--        \--
                                               unf., mg/L as                                                                                                                 
                                               calcium carbonate                                                                                                             

  00915                                        Calcium, wat.,    2        7.800      5.300                 \--       \--              \--               \--       \--        \--
                                               filt., mg/L                                                                                                                   

  00925                                        Magnesium, wat.,  2        3.200      2.200                 \--       \--              \--               \--       \--        \--
                                               filt., mg/L                                                                                                                   

  00935                                        Potassium, wat.,  2        3.000      2.000                 \--       \--              \--               \--       \--        \--
                                               filt., mg/L                                                                                                                   

  00931                                        Sodium adsorption 2        3.000      0.500                 \--       \--              \--               \--       \--        \--
                                               ratio, wat.,                                                                                                                  
                                               number                                                                                                                        

  00930                                        Sodium, wat.,     2        38.000     5.300                 \--       \--              \--               \--       \--        \--
                                               filt., mg/L                                                                                                                   

  00932                                        Sodium, wat.,     2        69.000     32.000                \--       \--              \--               \--       \--        \--
                                               percent in                                                                                                                    
                                               equivalents of                                                                                                                
                                               major cations                                                                                                                 

  00431                                        Acid neutralizing 7        41.000     23.000                31.000    41.000           35.000            29.000    28.000     23.000
                                               capacity, wat.,                                                                                                               
                                               unf., mg/L as                                                                                                                 
                                               calcium carbonate                                                                                                             

  99430                                        Carbonate, wat.,  1        25.000     \--                   \--       \--              \--               \--       \--        \--
                                               unf., incremental                                                                                                             
                                               titration, field,                                                                                                             
                                               mg/L as calcium                                                                                                               
                                               carbonate                                                                                                                     

  90410                                        Acid neutralizing 2        43.000     18.000                \--       \--              \--               \--       \--        \--
                                               capacity, wat.,                                                                                                               
                                               unf., fixed                                                                                                                   
                                               endpoint (pH 4.5)                                                                                                             
                                               titration,                                                                                                                    
                                               laboratory, mg/L                                                                                                              
                                               as calcium                                                                                                                    
                                               carbonate                                                                                                                     

  00410                                        Acid neutralizing 1        25.000     \--                   \--       \--              \--               \--       \--        \--
                                               capacity, wat.,                                                                                                               
                                               unf., fixed                                                                                                                   
                                               endpoint (pH 4.5)                                                                                                             
                                               titration, field,                                                                                                             
                                               mg/L as calcium                                                                                                               
                                               carbonate                                                                                                                     

  99440                                        Bicarbonate,      1        31.000     \--                   \--       \--              \--               \--       \--        \--
                                               wat., unf.,                                                                                                                   
                                               incremental                                                                                                                   
                                               titration, field,                                                                                                             
                                               mg/L                                                                                                                          

  99445                                        Carbonate, wat.,  1        0.000      \--                   \--       \--              \--               \--       \--        \--
                                               unf., incremental                                                                                                             
                                               titration, field,                                                                                                             
                                               mg/L                                                                                                                          

  00940                                        Chloride, wat.,   2        7.800      5.700                 \--       \--              \--               \--       \--        \--
                                               filt., mg/L                                                                                                                   

  00950                                        Fluoride, wat.,   2        \--        \--                   \--       \--              \--               \--       \--        \--
                                               filt., mg/L                                                                                                                   

  00955                                        Silica, wat.,     2        14.000     8.900                 \--       \--              \--               \--       \--        \--
                                               filt., mg/L                                                                                                                   

  00945                                        Sulfate, wat.,    2        60.000     8.300                 \--       \--              \--               \--       \--        \--
                                               filt., mg/L                                                                                                                   

  00530                                        Residue, total    1        7.000      \--                   \--       \--              \--               \--       \--        \--
                                               nonfilterable,                                                                                                                
                                               mg/L                                                                                                                          

  70300                                        Residue on        2        160.000    61.000                \--       \--              \--               \--       \--        \--
                                               evaporation,                                                                                                                  
                                               dried at 180                                                                                                                  
                                               degrees Celsius,                                                                                                              
                                               wat., filt., mg/L                                                                                                             

  00500                                        Residue on        1        150.000    \--                   \--       \--              \--               \--       \--        \--
                                               evaporation,                                                                                                                  
                                               dried at 105                                                                                                                  
                                               degrees Celsius,                                                                                                              
                                               wat., unf., mg/L                                                                                                              

  00625                                        Ammonia plus      1        0.500      \--                   \--       \--              \--               \--       \--        \--
                                               organic nitrogen,                                                                                                             
                                               wat., unf., mg/L                                                                                                              
                                               as nitrogen                                                                                                                   

  00665                                        Phosphorus, wat., 1        0.100      \--                   \--       \--              \--               \--       \--        \--
                                               unf., mg/L                                                                                                                    

  00680                                        Organic carbon,   1        12.000     \--                   \--       \--              \--               \--       \--        \--
                                               wat., unf., mg/L                                                                                                              

  01105                                        Aluminum, wat.,   1        940.000    \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01002                                        Arsenic, wat.,    1        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf., ug/L                                                                                                                    

  01027                                        Cadmium, wat.,    1        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf., ug/L                                                                                                                    

  01034                                        Chromium, wat.,   1        18.000     \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01037                                        Cobalt, wat.,     1        1.000      \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01042                                        Copper, wat.,     1        3.000      \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01045                                        Iron, wat., unf., 1        1800.000   \--                   \--       \--              \--               \--       \--        \--
                                               recoverable, ug/L                                                                                                             

  01051                                        Lead, wat., unf., 1        2.000      \--                   \--       \--              \--               \--       \--        \--
                                               recoverable, ug/L                                                                                                             

  01055                                        Manganese, wat.,  1        110.000    \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  71900                                        Mercury, wat.,    1        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01062                                        Molybdenum, wat., 1        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01067                                        Nickel, wat.,     1        2.000      \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01147                                        Selenium, wat.,   1        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf., ug/L                                                                                                                    

  01077                                        Silver, wat.,     1        \--        \--                   \--       \--              \--               \--       \--        \--
                                               unf.,                                                                                                                         
                                               recoverable, ug/L                                                                                                             

  01092                                        Zinc, wat., unf., 1        \--        \--                   \--       \--              \--               \--       \--        \--
                                               recoverable, ug/L                                                                                                             

  80154                                        Suspended         2        59.000     6.000                 \--       \--              \--               \--       \--        \--
                                               sediment                                                                                                                      
                                               concentration,                                                                                                                
                                               mg/L                                                                                                                          

  **02085079**[]{#__RefHeading___Toc50352691                                                                                                                                 
  .anchor} **Eno River near Weaver (October                                                                                                                                  
  1988--August 1999)**                                                                                                                                                       

  00060                                        Discharge, cubic  1        275.000    \--                   \--       \--              \--               \--       \--        \--
                                               feet per second                                                                                                               

  00061                                        Discharge,        110      4200.000   2.900                 148.595   449.800          114.000           60.500    22.000     4.755
                                               instantaneous,                                                                                                                
                                               cubic feet per                                                                                                                
                                               second                                                                                                                        

  00080                                        Color, wat.,      109      250.000    12.000                62.468    165.000          80.000            50.000    34.000     15.500
                                               filt., platinum                                                                                                               
                                               cobalt units                                                                                                                  

  00300                                        Dissolved oxygen, 106      15.800     5.300                 9.133     13.165           11.125            8.950     6.900      5.600
                                               wat., unf., mg/L                                                                                                              

  00301                                        Dissolved oxygen, 103      143.000    55.000                89.117    104.000          97.000            92.000    80.000     67.200
                                               wat., unf.,                                                                                                                   
                                               percent of                                                                                                                    
                                               saturation                                                                                                                    

  00400                                        pH, wat., unf.,   111      7.600      5.900                 7.091     7.504            7.300             7.140     6.940      6.460
                                               field, standard                                                                                                               
                                               units                                                                                                                         

  00403                                        pH, wat., unf.,   109      8.000      6.800                 7.371     7.800            7.500             7.400     7.200      6.900
                                               laboratory,                                                                                                                   
                                               standard units                                                                                                                

  90095                                        Specific          109      701.000    64.000                213.927   497.000          247.500           168.000   119.000    92.500
                                               conductance,                                                                                                                  
                                               wat., unf.,                                                                                                                   
                                               laboratory,                                                                                                                   
                                               microsiemens per                                                                                                              
                                               centimeter at 25                                                                                                              
                                               degrees Celsius                                                                                                               

  00095                                        Specific          108      700.000    60.000                209.204   497.050          257.500           161.000   111.250    86.900
                                               conductance,                                                                                                                  
                                               wat., unf.,                                                                                                                   
                                               microsiemens per                                                                                                              
                                               centimeter at 25                                                                                                              
                                               degrees Celsius                                                                                                               

  00900                                        Hardness, wat.,   109      86.000     18.000                36.229    65.000           40.000            34.000    28.000     24.000
                                               unf., mg/L as                                                                                                                 
                                               calcium carbonate                                                                                                             

  00915                                        Calcium, wat.,    109      26.000     4.400                 9.175     19.000           10.000            8.200     6.700      5.700
                                               filt., mg/L                                                                                                                   

  00925                                        Magnesium, wat.,  109      5.100      1.700                 3.225     4.850            3.700             3.100     2.650      2.300
                                               filt., mg/L                                                                                                                   

  00935                                        Potassium, wat.,  109      9.600      0.100                 3.028     6.500            3.800             2.600     1.750      1.500
                                               filt., mg/L                                                                                                                   

  00931                                        Sodium adsorption 109      8.000      0.400                 1.783     4.500            2.000             1.000     0.800      0.550
                                               ratio, wat.,                                                                                                                  
                                               number                                                                                                                        

  00930                                        Sodium, wat.,     109      120.000    4.000                 25.997    77.500           30.000            18.000    10.000     6.250
                                               filt., mg/L                                                                                                                   

  00932                                        Sodium, wat.,     108      83.000     29.000                52.000    72.550           58.000            52.500    42.250     34.450
                                               percent in                                                                                                                    
                                               equivalents of                                                                                                                
                                               major cations                                                                                                                 

  99430                                        Carbonate, wat.,  51       58.000     17.000                33.137    51.200           43.000            30.000    23.000     19.800
                                               unf., incremental                                                                                                             
                                               titration, field,                                                                                                             
                                               mg/L as calcium                                                                                                               
                                               carbonate                                                                                                                     

  90410                                        Acid neutralizing 109      61.000     12.000                33.514    53.000           40.500            32.000    24.500     20.500
                                               capacity, wat.,                                                                                                               
                                               unf., fixed                                                                                                                   
                                               endpoint (pH 4.5)                                                                                                             
                                               titration,                                                                                                                    
                                               laboratory, mg/L                                                                                                              
                                               as calcium                                                                                                                    
                                               carbonate                                                                                                                     

  39086                                        Alkalinity, wat., 1        53.000     \--                   \--       \--              \--               \--       \--        \--
                                               filt.,                                                                                                                        
                                               incremental                                                                                                                   
                                               titration, field,                                                                                                             
                                               mg/L as calcium                                                                                                               
                                               carbonate                                                                                                                     

  00410                                        Acid neutralizing 54       61.000     17.000                34.019    58.500           43.250            29.500    24.000     20.000
                                               capacity, wat.,                                                                                                               
                                               unf., fixed                                                                                                                   
                                               endpoint (pH 4.5)                                                                                                             
                                               titration, field,                                                                                                             
                                               mg/L as calcium                                                                                                               
                                               carbonate                                                                                                                     
  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent     Sample   Maximum    Minimum   Mean                            **Percentile**                                           
  code**                                         name**            size                                                                                                                   
  ---------------------------------------------- ----------------- -------- ---------- --------- ---------- --------- ---------- ---------------- ---------- ------ ---------- ---------- ---------
                                                                                                                                 95th                        75th   50th       **25th**   **5th**

  00419                                          Acid neutralizing 5        61.000     21.000    \--                             \--              \--               \--        \--        \--
                                                 capacity, wat.,                                                                                                                          
                                                 unf., incremental                                                                                                                        
                                                 titration, field,                                                                                                                        
                                                 mg/L as calcium                                                                                                                          
                                                 carbonate                                                                                                                                

  99440                                          Bicarbonate,      56       74.000     21.000    40.839                          65.900           53.500            36.000     27.250     24.550
                                                 wat., unf.,                                                                                                                              
                                                 incremental                                                                                                                              
                                                 titration, field,                                                                                                                        
                                                 mg/L                                                                                                                                     

  99445                                          Carbonate, wat.,  12       0.000      \--       \--                             \--              \--               \--        \--        \--
                                                 unf., incremental                                                                                                                        
                                                 titration, field,                                                                                                                        
                                                 mg/L                                                                                                                                     

  00452                                          Carbonate, wat.,  1        0.000      \--       \--                             \--              \--               \--        \--        \--
                                                 filt.,                                                                                                                                   
                                                 incremental                                                                                                                              
                                                 titration, field,                                                                                                                        
                                                 mg/L                                                                                                                                     

  00940                                          Chloride, wat.,   105      54.000     4.000     13.477                          42.200           14.000            9.500      7.700      5.490
                                                 filt., mg/L                                                                                                                              

  00950                                          Fluoride, wat.,   105      0.500      \--       0.145\*                         \*0.400          \*0.200           \*0.100    \*0.074    \*0.039
                                                 filt., mg/L                                                                                                                              

  00955                                          Silica, wat.,     105      14.000     1.000     9.645                           13.000           12.000            10.000     7.900      2.830
                                                 filt., mg/L                                                                                                                              

  00945                                          Sulfate, wat.,    105      240.000    5.300     38.817                          127.000          42.000            25.000     14.500     8.350
                                                 filt., mg/L                                                                                                                              

  99890                                          Sulfate, wat.,    7        \--        \--       \--                             \--              \--               \--        \--        \--
                                                 filt.,                                                                                                                                   
                                                 uncorrected, mg/L                                                                                                                        

  70300                                          Residue on        104      484.000    40.000    131.808                         285.500          167.250           101.000    78.500     54.500
                                                 evaporation,                                                                                                                             
                                                 dried at 180                                                                                                                             
                                                 degrees Celsius,                                                                                                                         
                                                 wat., filt., mg/L                                                                                                                        

  00608                                          Ammonia, wat.,    106      0.220      \--       0.050\*                         \*0.127          \*0.070           \*0.040    \*0.020    \*0.006
                                                 filt., mg/L as                                                                                                                           
                                                 nitrogen                                                                                                                                 

  00623                                          Ammonia plus      84       1.400      0.200     0.444                           0.875            0.500             0.400      0.300      0.200
                                                 organic nitrogen,                                                                                                                        
                                                 wat., filt., mg/L                                                                                                                        
                                                 as nitrogen                                                                                                                              

  00625                                          Ammonia plus      110      1.900      0.200     0.491                           0.890            0.600             0.400      0.375      0.255
                                                 organic nitrogen,                                                                                                                        
                                                 wat., unf., mg/L                                                                                                                         
                                                 as nitrogen                                                                                                                              

  00610                                          Ammonia, wat.,    48       0.120      0.000     0.051                           0.115            0.070             0.050      0.030      0.005
                                                 unf., mg/L as                                                                                                                            
                                                 nitrogen                                                                                                                                 

  00620                                          Nitrate, wat.,    41       9.080      0.270     1.371                           3.069            1.780             0.970      0.585      0.381
                                                 unf., mg/L as                                                                                                                            
                                                 nitrogen                                                                                                                                 

  00631                                          Nitrite plus      106      9.200      0.005     1.015                           3.000            1.100             0.605      0.377      0.120
                                                 nitrate, wat.,                                                                                                                           
                                                 filt., mg/L as                                                                                                                           
                                                 nitrogen                                                                                                                                 

  00630                                          Nitrite plus      48       9.100      0.230     1.256                           3.055            1.700             0.830      0.500      0.300
                                                 nitrate, wat.,                                                                                                                           
                                                 unf., mg/L as                                                                                                                            
                                                 nitrogen                                                                                                                                 

  00613                                          Nitrite, wat.,    82       0.120      \--       0.017\*                         \*0.060          \*0.020           \*0.007    \*0.002    \*0.001
                                                 filt., mg/L as                                                                                                                           
                                                 nitrogen                                                                                                                                 

  00615                                          Nitrite, wat.,    48       0.110      \--       0.023\*                         \*0.090          \*0.030           \*0.020    \*0.010    \*0.005
                                                 unf., mg/L as                                                                                                                            
                                                 nitrogen                                                                                                                                 

  00605                                          Organic nitrogen, 93       1.900      0.160     0.461                           0.923            0.525             0.390      0.330      0.230
                                                 wat., unf., mg/L                                                                                                                         

  00666                                          Phosphorus, wat., 89       1.000      \--       0.056\*                         \*0.136          \*0.060           \*0.030    \*0.020    \*0.007
                                                 filt., mg/L                                                                                                                              

  00671                                          Orthophosphate,   106      0.880      \--       0.040\*                         \*0.110          \*0.040           \*0.020    \*0.010    \*0.003
                                                 wat., filt., mg/L                                                                                                                        
                                                 as phosphorus                                                                                                                            

  70507                                          Orthophosphate,   48       0.950      0.000     0.072                           0.153            0.070             0.050      0.030      0.005
                                                 wat., unf., mg/L                                                                                                                         
                                                 as phosphorus                                                                                                                            

  00665                                          Phosphorus, wat., 109      1.100      0.000     0.080                           0.165            0.090             0.060      0.040      0.010
                                                 unf., mg/L                                                                                                                               

  00680                                          Organic carbon,   109      22.000     3.300     6.351                           11.500           6.800             5.800      4.800      3.800
                                                 wat., unf., mg/L                                                                                                                         

  01105                                          Aluminum, wat.,   43       4000.000   70.000    597.093                         2680.000         630.000           340.000    170.000    82.000
                                                 unf.,                                                                                                                                    
                                                 recoverable, ug/L                                                                                                                        

  01002                                          Arsenic, wat.,    43       \--        \--       \--                             \--              \--               \--        \--        \--
                                                 unf., ug/L                                                                                                                               

  01027                                          Cadmium, wat.,    43       \--        \--       \--                             \--              \--               \--        \--        \--
                                                 unf., ug/L                                                                                                                               

  01034                                          Chromium, wat.,   43       6.000      \--       1.162\*                         \*5.600          \*1.000           \*0.542    \*0.221    \*0.060
                                                 unf.,                                                                                                                                    
                                                 recoverable, ug/L                                                                                                                        

  01037                                          Cobalt, wat.,     43       7.000      \--       0.820\*                         \*3.000          \*1.000           \*0.379    \*0.156    \*0.043
                                                 unf.,                                                                                                                                    
                                                 recoverable, ug/L                                                                                                                        

  01042                                          Copper, wat.,     43       15.000     1.000     3.767                           11.400           4.000             3.000      2.000      1.200
                                                 unf.,                                                                                                                                    
                                                 recoverable, ug/L                                                                                                                        

  01045                                          Iron, wat., unf., 43       6300.000   160.000   1149.977                        3960.000         1200.000          790.000    590.000    234.000
                                                 recoverable, ug/L                                                                                                                        

  01051                                          Lead, wat., unf., 43       12.000     \--       2.061\*                         \*9.400          \*3.000           \*1.000    \*0.458    \*0.134
                                                 recoverable, ug/L                                                                                                                        

  01055                                          Manganese, wat.,  43       860.000    40.000    120.505                         448.000          120.000           80.000     60.000     50.000
                                                 unf.,                                                                                                                                    
                                                 recoverable, ug/L                                                                                                                        

  71900                                          Mercury, wat.,    43       \--        \--       \--                             \--              \--               \--        \--        \--
                                                 unf.,                                                                                                                                    
                                                 recoverable, ug/L                                                                                                                        

  01062                                          Molybdenum, wat., 43       6.000      \--       0.875\*                         \*5.800          \*1.000           \*0.337    \*0.125    \*0.030
                                                 unf.,                                                                                                                                    
                                                 recoverable, ug/L                                                                                                                        

  01067                                          Nickel, wat.,     43       6.000      \--       1.848\*                         \*5.800          \*2.000           \*1.000    \*0.745    \*0.333
                                                 unf.,                                                                                                                                    
                                                 recoverable, ug/L                                                                                                                        

  01147                                          Selenium, wat.,   43       \--        \--       \--                             \--              \--               \--        \--        \--
                                                 unf., ug/L                                                                                                                               

  01077                                          Silver, wat.,     42       \--        \--       \--                             \--              \--               \--        \--        \--
                                                 unf.,                                                                                                                                    
                                                 recoverable, ug/L                                                                                                                        

  01092                                          Zinc, wat., unf., 43       40.000     \--       12.991\*                        \*30.000         \*20.000          \*10.000   \*6.128    \*2.979
                                                 recoverable, ug/L                                                                                                                        

  80154                                          Suspended         104      652.000    1.000     35.058                          141.750          27.500            15.500     7.250      2.250
                                                 sediment                                                                                                                                 
                                                 concentration,                                                                                                                           
                                                 mg/L                                                                                                                                     

  **0208521324**[]{#__RefHeading___Toc50352692                                                                                                                                            
  .anchor} **Little River at SR 1461 near Orange                                                                                                                                          
  Factory (October 1988--March 2001)**                                                                                                                                                    

  00061                                          Discharge,        43       4900.000   0.080                350.994   2364.000                    258.000           26.000     7.600      0.748
                                                 instantaneous,                                                                                                                           
                                                 cubic feet per                                                                                                                           
                                                 second                                                                                                                                   

  00080                                          Color, wat.,      18       180.000    13.000               87.833    180.000                     162.500           80.000     30.250     13.000
                                                 filt., platinum                                                                                                                          
                                                 cobalt units                                                                                                                             

  00300                                          Dissolved oxygen, 40       16.400     5.800                9.892     13.295                      10.800            9.900      8.900      6.025
                                                 wat., unf., mg/L                                                                                                                         

  00301                                          Dissolved oxygen, 23       129.000    77.000               100.739   128.000                     106.000           100.000    93.000     77.400
                                                 wat., unf.,                                                                                                                              
                                                 percent of                                                                                                                               
                                                 saturation                                                                                                                               

  00400                                          pH, wat., unf.,   43       8.100      6.100                6.973     7.958                       7.230             6.900      6.700      6.312
                                                 field, standard                                                                                                                          
                                                 units                                                                                                                                    

  00403                                          pH, wat., unf.,   21       8.200      6.500                7.352     8.190                       7.650             7.300      6.950      6.510
                                                 laboratory,                                                                                                                              
                                                 standard units                                                                                                                           

  90095                                          Specific          21       114.000    41.000               76.619    113.900                     93.500            74.000     61.000     41.800
                                                 conductance,                                                                                                                             
                                                 wat., unf.,                                                                                                                              
                                                 laboratory,                                                                                                                              
                                                 microsiemens per                                                                                                                         
                                                 centimeter at 25                                                                                                                         
                                                 degrees Celsius                                                                                                                          

  00095                                          Specific          43       115.000    44.600               74.360    104.000                     89.000            75.000     60.000     45.340
                                                 conductance,                                                                                                                             
                                                 wat., unf.,                                                                                                                              
                                                 microsiemens per                                                                                                                         
                                                 centimeter at 25                                                                                                                         
                                                 degrees Celsius                                                                                                                          

  00900                                          Hardness, wat.,   27       39.000     11.000               24.185    39.000                      31.000            22.000     19.000     12.200
                                                 unf., mg/L as                                                                                                                            
                                                 calcium carbonate                                                                                                                        

  00915                                          Calcium, wat.,    27       9.400      2.600                5.733     9.320                       7.300             5.000      4.100      2.840
                                                 filt., mg/L                                                                                                                              

  00925                                          Magnesium, wat.,  27       3.800      1.100                2.381     3.800                       2.900             2.300      1.900      1.180
                                                 filt., mg/L                                                                                                                              

  00935                                          Potassium, wat.,  27       4.500      1.000                1.959     4.220                       2.300             1.600      1.200      1.000
                                                 filt., mg/L                                                                                                                              

  00931                                          Sodium adsorption 27       0.500      0.200                0.344     0.460                       0.400             0.400      0.300      0.200
                                                 ratio, wat.,                                                                                                                             
                                                 number                                                                                                                                   

  00930                                          Sodium, wat.,     27       6.500      1.500                4.115     6.260                       5.400             4.300      2.900      1.660
                                                 filt., mg/L                                                                                                                              

  00932                                          Sodium, wat.,     27       32.000     18.000               24.926    31.600                      29.000            25.000     20.000     18.000
                                                 percent in                                                                                                                               
                                                 equivalents of                                                                                                                           
                                                 major cations                                                                                                                            

  99430                                          Carbonate, wat.,  2        12.000     12.000               \--       \--                         \--               \--        \--        \--
                                                 unf., incremental                                                                                                                        
                                                 titration, field,                                                                                                                        
                                                 mg/L as calcium                                                                                                                          
                                                 carbonate                                                                                                                                

  90410                                          Acid neutralizing 21       47.000     6.400                24.257    47.000                      33.500            23.000     16.000     6.660
                                                 capacity, wat.,                                                                                                                          
                                                 unf., fixed                                                                                                                              
                                                 endpoint (pH 4.5)                                                                                                                        
                                                 titration,                                                                                                                               
                                                 laboratory, mg/L                                                                                                                         
                                                 as calcium                                                                                                                               
                                                 carbonate                                                                                                                                

  00410                                          Acid neutralizing 3        15.000     10.000               \--       \--                         \--               \--        \--        \--
                                                 capacity, wat.,                                                                                                                          
                                                 unf., fixed                                                                                                                              
                                                 endpoint (pH 4.5)                                                                                                                        
                                                 titration, field,                                                                                                                        
                                                 mg/L as calcium                                                                                                                          
                                                 carbonate                                                                                                                                

  00419                                          Acid neutralizing 2        15.000     5.000                \--       \--                         \--               \--        \--        \--
                                                 capacity, wat.,                                                                                                                          
                                                 unf., incremental                                                                                                                        
                                                 titration, field,                                                                                                                        
                                                 mg/L as calcium                                                                                                                          
                                                 carbonate                                                                                                                                

  99440                                          Bicarbonate,      4        18.000     6.300                \--       \--                         \--               \--        \--        \--
                                                 wat., unf.,                                                                                                                              
                                                 incremental                                                                                                                              
                                                 titration, field,                                                                                                                        
                                                 mg/L                                                                                                                                     
  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent     Sample   Maximum    Minimum   Mean                 **Percentile**                                           
  code**                                         name**            size                                                                                                        
  ---------------------------------------------- ----------------- -------- ---------- --------- ---------- --------- ---------------- ---------- ------ ---------- ---------- ---------
                                                                                                                      95th                        75th   50th       **25th**   **5th**

  99445                                          Carbonate, wat.,  2        0.000      \--       \--                  \--              \--               \--        \--        \--
                                                 unf., incremental                                                                                                             
                                                 titration, field,                                                                                                             
                                                 mg/L                                                                                                                          

  00940                                          Chloride, wat.,   25       6.300      2.400     4.504                6.270            5.300             4.500      3.850      2.430
                                                 filt., mg/L                                                                                                                   

  00950                                          Fluoride, wat.,   25       0.300      \--       0.079\*              \*0.270          \*0.100           \*0.056    \*0.035    \*0.016
                                                 filt., mg/L                                                                                                                   

  00955                                          Silica, wat.,     17       17.000     5.000     10.271               17.000           14.000            9.500      7.400      5.000
                                                 filt., mg/L                                                                                                                   

  00945                                          Sulfate, wat.,    25       11.000     1.400     4.268                9.800            5.500             4.000      2.500      1.490
                                                 filt., mg/L                                                                                                                   

  99890                                          Sulfate, wat.,    4        \--        \--       \--                  \--              \--               \--        \--        \--
                                                 filt.,                                                                                                                        
                                                 uncorrected, mg/L                                                                                                             

  70300                                          Residue on        20       74.000     37.000    56.700               73.600           62.500            59.000     49.250     37.350
                                                 evaporation,                                                                                                                  
                                                 dried at 180                                                                                                                  
                                                 degrees Celsius,                                                                                                              
                                                 wat., filt., mg/L                                                                                                             

  00608                                          Ammonia, wat.,    8        0.128      0.005     0.033                0.128            0.036             0.020      0.012      0.005
                                                 filt., mg/L as                                                                                                                
                                                 nitrogen                                                                                                                      

  00623                                          Ammonia plus      1        0.300      \--       \--                  \--              \--               \--        \--        \--
                                                 organic nitrogen,                                                                                                             
                                                 wat., filt., mg/L                                                                                                             
                                                 as nitrogen                                                                                                                   

  00625                                          Ammonia plus      27       1.300      0.200     0.600                1.300            0.800             0.500      0.300      0.200
                                                 organic nitrogen,                                                                                                             
                                                 wat., unf., mg/L                                                                                                              
                                                 as nitrogen                                                                                                                   

  00610                                          Ammonia, wat.,    19       0.160      \--       0.040\*              \*0.160          \*0.050           \*0.030    \*0.020    \*0.005
                                                 unf., mg/L as                                                                                                                 
                                                 nitrogen                                                                                                                      

  00620                                          Nitrate, wat.,    1        0.210      \--       \--                  \--              \--               \--        \--        \--
                                                 unf., mg/L as                                                                                                                 
                                                 nitrogen                                                                                                                      

  00631                                          Nitrite plus      8        0.440      0.059     0.237                0.440            0.380             0.200      0.130      0.059
                                                 nitrate, wat.,                                                                                                                
                                                 filt., mg/L as                                                                                                                
                                                 nitrogen                                                                                                                      

  00630                                          Nitrite plus      19       0.700      \--       0.337\*              \*0.700          \*0.400           \*0.300    \*0.220    \*0.100
                                                 nitrate, wat.,                                                                                                                
                                                 unf., mg/L as                                                                                                                 
                                                 nitrogen                                                                                                                      

  00613                                          Nitrite, wat.,    5        \--        \--       \--                  \--              \--               \--        \--        \--
                                                 filt., mg/L as                                                                                                                
                                                 nitrogen                                                                                                                      

  00615                                          Nitrite, wat.,    4        \--        \--       \--                  \--              \--               \--        \--        \--
                                                 unf., mg/L as                                                                                                                 
                                                 nitrogen                                                                                                                      

  00605                                          Organic nitrogen, 24       1.300      0.180     0.582                1.275            0.767             0.550      0.305      0.180
                                                 wat., unf., mg/L                                                                                                              

  00666                                          Phosphorus, wat., 1        0.040      \--       \--                  \--              \--               \--        \--        \--
                                                 filt., mg/L                                                                                                                   

  00671                                          Orthophosphate,   5        0.039      0.008     \--                  \--              \--               \--        \--        \--
                                                 wat., filt., mg/L                                                                                                             
                                                 as phosphorus                                                                                                                 

  70507                                          Orthophosphate,   19       0.110      \--       0.034\*              \*0.110          \*0.040           \*0.030    \*0.010    \*0.004
                                                 wat., unf., mg/L                                                                                                              
                                                 as phosphorus                                                                                                                 

  00665                                          Phosphorus, wat., 27       0.250      0.010     0.080                0.242            0.090             0.040      0.030      0.014
                                                 unf., mg/L                                                                                                                    

  00680                                          Organic carbon,   24       38.000     3.000     10.692               33.750           14.750            8.750      4.675      3.175
                                                 wat., unf., mg/L                                                                                                              

  01105                                          Aluminum, wat.,   17       4000.000   50.000    1087.765             4000.000         1485.000          612.000    125.000    50.000
                                                 unf.,                                                                                                                         
                                                 recoverable, ug/L                                                                                                             

  01002                                          Arsenic, wat.,    23       \--        \--       \--                  \--              \--               \--        \--        \--
                                                 unf., ug/L                                                                                                                    

  01027                                          Cadmium, wat.,    26       \--        \--       \--                  \--              \--               \--        \--        \--
                                                 unf., ug/L                                                                                                                    

  01034                                          Chromium, wat.,   26       130.000    \--       6.062\*              \*85.900         \*2.499           \*0.401    \*0.095    \*0.012
                                                 unf.,                                                                                                                         
                                                 recoverable, ug/L                                                                                                             

  01037                                          Cobalt, wat.,     17       2.000      \--       1.059\*              \*2.000          \*1.000           \*1.000    \*0.714    \*0.486
                                                 unf.,                                                                                                                         
                                                 recoverable, ug/L                                                                                                             

  01042                                          Copper, wat.,     26       39.000     \--       5.330\*              \*38.650         \*4.250           \*2.109    \*1.000    \*0.343
                                                 unf.,                                                                                                                         
                                                 recoverable, ug/L                                                                                                             

  01045                                          Iron, wat., unf., 26       6700.000   360.000   1878.462             6700.000         2320.000          1350.000   785.000    360.000
                                                 recoverable, ug/L                                                                                                             

  01051                                          Lead, wat., unf., 26       14.000     \--       2.096\*              \*10.500         \*3.000           \*1.623    \*0.693    \*0.292
                                                 recoverable, ug/L                                                                                                             

  01055                                          Manganese, wat.,  26       1100.000   20.000    178.923              928.500          273.250           70.000     37.500     20.000
                                                 unf.,                                                                                                                         
                                                 recoverable, ug/L                                                                                                             

  71900                                          Mercury, wat.,    26       \--        \--       \--                  \--              \--               \--        \--        \--
                                                 unf.,                                                                                                                         
                                                 recoverable, ug/L                                                                                                             

  01062                                          Molybdenum, wat., 17       \--        \--       \--                  \--              \--               \--        \--        \--
                                                 unf.,                                                                                                                         
                                                 recoverable, ug/L                                                                                                             

  01067                                          Nickel, wat.,     24       3.000      \--       1.285\*              \*2.750          \*2.000           \*1.000    \*0.798    \*0.465
                                                 unf.,                                                                                                                         
                                                 recoverable, ug/L                                                                                                             

  01147                                          Selenium, wat.,   17       \--        \--       \--                  \--              \--               \--        \--        \--
                                                 unf., ug/L                                                                                                                    

  01077                                          Silver, wat.,     24       \--        \--       \--                  \--              \--               \--        \--        \--
                                                 unf.,                                                                                                                         
                                                 recoverable, ug/L                                                                                                             

  01092                                          Zinc, wat., unf., 26       30.000     \--       10.751\*             \*28.670         \*16.033          \*8.642    \*5.222    \*2.508
                                                 recoverable, ug/L                                                                                                             

  80154                                          Suspended         25       476.000    2.000     87.360               422.600          159.500           28.000     5.000      2.000
                                                 sediment                                                                                                                      
                                                 concentration,                                                                                                                
                                                 mg/L                                                                                                                          

  **0208524845**[]{#__RefHeading___Toc50352693                                                                                                                                 
  .anchor} **Little River Reservoir at dam near                                                                                                                                
  Bahama (October 1988--August 2001)**                                                                                                                                         

  00080                                          Color, wat.,      57       120.000    10.000    39.088     101.000                    50.000            30.000     22.500     12.900
                                                 filt., platinum                                                                                                               
                                                 cobalt units                                                                                                                  

  00078                                          Transparency,     38       1.900      0.550     0.929      1.282                      1.013             0.900      0.750      0.550
                                                 wat., unf.,                                                                                                                   
                                                 Secchi disc,                                                                                                                  
                                                 meters                                                                                                                        

  00300                                          Dissolved oxygen, 73       12.000     0.090     5.384      9.119                      7.640             5.320      3.740      0.188
                                                 wat., unf., mg/L                                                                                                              

  00301                                          Dissolved oxygen, 73       116.000    0.000     60.959     109.900                    87.500            64.000     43.500     2.000
                                                 wat., unf.,                                                                                                                   
                                                 percent of                                                                                                                    
                                                 saturation                                                                                                                    

  00400                                          pH, wat., unf.,   75       8.440      6.100     6.781      7.626                      7.000             6.780      6.500      6.120
                                                 field, standard                                                                                                               
                                                 units                                                                                                                         

  00403                                          pH, wat., unf.,   58       8.200      6.500     7.267      7.910                      7.500             7.200      7.000      6.790
                                                 laboratory,                                                                                                                   
                                                 standard units                                                                                                                

  90095                                          Specific          58       91.000     56.000    72.483     89.000                     77.000            74.000     66.750     56.950
                                                 conductance,                                                                                                                  
                                                 wat., unf.,                                                                                                                   
                                                 laboratory,                                                                                                                   
                                                 microsiemens per                                                                                                              
                                                 centimeter at 25                                                                                                              
                                                 degrees Celsius                                                                                                               

  00095                                          Specific          75       242.000    48.000    80.607     194.600                    80.000            72.000     66.000     54.800
                                                 conductance,                                                                                                                  
                                                 wat., unf.,                                                                                                                   
                                                 microsiemens per                                                                                                              
                                                 centimeter at 25                                                                                                              
                                                 degrees Celsius                                                                                                               

  00900                                          Hardness, wat.,   58       31.000     17.000    22.966     28.150                     25.000            23.000     21.000     18.000
                                                 unf., mg/L as                                                                                                                 
                                                 calcium carbonate                                                                                                             

  00915                                          Calcium, wat.,    58       8.200      4.100     5.572      7.030                      6.100             5.500      5.000      4.200
                                                 filt., mg/L                                                                                                                   

  00925                                          Magnesium, wat.,  58       3.000      1.700     2.198      2.600                      2.400             2.200      2.000      1.700
                                                 filt., mg/L                                                                                                                   

  00935                                          Potassium, wat.,  58       2.600      1.200     1.831      2.600                      2.000             1.800      1.600      1.300
                                                 filt., mg/L                                                                                                                   

  00931                                          Sodium adsorption 58       0.400      0.200     0.355      0.400                      0.400             0.400      0.300      0.300
                                                 ratio, wat.,                                                                                                                  
                                                 number                                                                                                                        

  00930                                          Sodium, wat.,     58       4.900      2.400     3.852      4.800                      4.400             4.000      3.400      2.885
                                                 filt., mg/L                                                                                                                   

  00932                                          Sodium, wat.,     58       30.000     20.000    24.879     28.000                     27.000            25.000     23.000     20.950
                                                 percent in                                                                                                                    
                                                 equivalents of                                                                                                                
                                                 major cations                                                                                                                 

  99430                                          Carbonate, wat.,  25       29.000     9.000     20.680     28.700                     24.000            20.000     17.000     10.200
                                                 unf., incremental                                                                                                             
                                                 titration, field,                                                                                                             
                                                 mg/L as calcium                                                                                                               
                                                 carbonate                                                                                                                     

  90410                                          Acid neutralizing 58       34.000     12.000    22.517     31.050                     26.000            22.000     19.000     15.850
                                                 capacity, wat.,                                                                                                               
                                                 unf., fixed                                                                                                                   
                                                 endpoint (pH 4.5)                                                                                                             
                                                 titration,                                                                                                                    
                                                 laboratory, mg/L                                                                                                              
                                                 as calcium                                                                                                                    
                                                 carbonate                                                                                                                     

  00410                                          Acid neutralizing 26       28.000     11.000    21.385     28.000                     25.250            22.000     17.000     11.700
                                                 capacity, wat.,                                                                                                               
                                                 unf., fixed                                                                                                                   
                                                 endpoint (pH 4.5)                                                                                                             
                                                 titration, field,                                                                                                             
                                                 mg/L as calcium                                                                                                               
                                                 carbonate                                                                                                                     

  00419                                          Acid neutralizing 11       25.000     13.000    20.727     25.000                     25.000            21.000     19.000     13.000
                                                 capacity, wat.,                                                                                                               
                                                 unf., incremental                                                                                                             
                                                 titration, field,                                                                                                             
                                                 mg/L as calcium                                                                                                               
                                                 carbonate                                                                                                                     

  99440                                          Bicarbonate,      36       35.000     11.000    25.181     34.150                     29.750            26.000     21.500     14.400
                                                 wat., unf.,                                                                                                                   
                                                 incremental                                                                                                                   
                                                 titration, field,                                                                                                             
                                                 mg/L                                                                                                                          
  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum     Minimum   Mean                 **Percentile**                                          
  code**                                                                        size                                                                                                        
  ---------------------------------------------- ------------------------------ -------- ----------- --------- ---------- --------- ---------------- ---------- ------ --------- ---------- ---------
                                                                                                                                    95th                        75th   50th      **25th**   **5th**

  99445                                          Carbonate, wat., unf.,         9        0.000       \--       \--                  \--              \--               \--       \--        \--
                                                 incremental titration, field,                                                                                                              
                                                 mg/L                                                                                                                                       

  00940                                          Chloride, wat., filt., mg/L    57       5.900       2.900     4.460                5.510            5.000             4.600     3.950      3.300

  00950                                          Fluoride, wat., filt., mg/L    57       1.900       \--       0.103\*              \*0.210          \*0.100           \*0.056   \*0.030    \*0.012

  00955                                          Silica, wat., filt., mg/L      56       11.000      3.800     7.695                10.000           8.700             7.950     6.800      4.710

  00945                                          Sulfate, wat., filt., mg/L     57       11.000      2.300     4.151                6.310            4.650             4.000     3.150      2.400

  99890                                          Sulfate, wat., filt.,          3        \--         \--       \--                  \--              \--               \--       \--        \--
                                                 uncorrected, mg/L                                                                                                                          

  70300                                          Residue on evaporation, dried  56       88.000      10.000    51.232               67.500           58.000            52.000    45.000     31.250
                                                 at 180 degrees Celsius, wat.,                                                                                                              
                                                 filt., mg/L                                                                                                                                

  00608                                          Ammonia, wat., filt., mg/L as  64       0.754       \--       0.114\*              \*0.362          \*0.150           \*0.076   \*0.030    \*0.006
                                                 nitrogen                                                                                                                                   

  00623                                          Ammonia plus organic nitrogen, 36       0.800       0.200     0.442                0.800            0.575             0.400     0.300      0.200
                                                 wat., filt., mg/L as nitrogen                                                                                                              

  00625                                          Ammonia plus organic nitrogen, 65       7.800       0.200     0.688                1.070            0.700             0.500     0.500      0.300
                                                 wat., unf., mg/L as nitrogen                                                                                                               

  00610                                          Ammonia, wat., unf., mg/L as   17       0.360       0.010     0.126                0.360            0.170             0.120     0.035      0.010
                                                 nitrogen                                                                                                                                   

  00620                                          Nitrate, wat., unf., mg/L as   6        0.290       0.060     0.202                0.290            0.290             0.205     0.135      0.060
                                                 nitrogen                                                                                                                                   

  00631                                          Nitrite plus nitrate, wat.,    65       0.400       \--       0.108\*              \*0.327          \*0.160           \*0.086   \*0.020    \*0.005
                                                 filt., mg/L as nitrogen                                                                                                                    

  00630                                          Nitrite plus nitrate, wat.,    17       0.340       \--       0.137\*              \*0.340          \*0.220           \*0.100   \*0.052    \*0.029
                                                 unf., mg/L as nitrogen                                                                                                                     

  00613                                          Nitrite, wat., filt., mg/L as  55       0.040       \--       0.007\*              \*0.040          \*0.008           \*0.004   \*0.002    \*0.001
                                                 nitrogen                                                                                                                                   

  00615                                          Nitrite, wat., unf., mg/L as   17       0.040       \--       0.012\*              \*0.040          \*0.010           \*0.005   \*0.002    \*0.001
                                                 nitrogen                                                                                                                                   

  00605                                          Organic nitrogen, wat., unf.,  60       0.750       0.190     0.458                0.736            0.560             0.455     0.370      0.240
                                                 mg/L                                                                                                                                       

  00666                                          Phosphorus, wat., filt., mg/L  37       0.050       \--       0.010\*              \*0.041          \*0.015           \*0.006   \*0.003    \*0.001

  00671                                          Orthophosphate, wat., filt.,   65       0.190       \--       0.007\*              \*0.020          \*0.005           \*0.002   \*0.001    \*0.000
                                                 mg/L as phosphorus                                                                                                                         

  70507                                          Orthophosphate, wat., unf.,    17       0.030       \--       0.016\*              \*0.030          \*0.020           \*0.016   \*0.013    \*0.010
                                                 mg/L as phosphorus                                                                                                                         

  00665                                          Phosphorus, wat., unf., mg/L   65       0.280       \--       0.033\*              \*0.070          \*0.040           \*0.030   \*0.020    \*0.008

  00680                                          Organic carbon, wat., unf.,    58       12.000      4.700     7.355                11.000           8.225             7.100     5.950      4.995
                                                 mg/L                                                                                                                                       

  70953                                          Chlorophyll a, phytoplankton,  58       19.500      0.100     6.060                16.555           9.300             4.250     2.500      0.485
                                                 chromatographic-fluorometric                                                                                                               
                                                 method, ug/L                                                                                                                               

  70954                                          Chlorophyll b, phytoplankton,  58       1.300       \--       0.374\*              \*1.015          \*0.500           \*0.300   \*0.169    \*0.091
                                                 chromatographic-fluorometric                                                                                                               
                                                 method, ug/L                                                                                                                               

  01105                                          Aluminum, wat., unf.,          45       1500.000    20.000    147.640              875.001          130.500           60.000    45.000     26.360
                                                 recoverable, ug/L                                                                                                                          

  01002                                          Arsenic, wat., unf., ug/L      45       \--         \--       \--                  \--              \--               \--       \--        \--

  01027                                          Cadmium, wat., unf., ug/L      45       \--         \--       \--                  \--              \--               \--       \--        \--

  01034                                          Chromium, wat., unf.,          45       9.000       \--       0.945\*              \*4.400          \*0.997           \*0.483   \*0.211    \*0.064
                                                 recoverable, ug/L                                                                                                                          

  01037                                          Cobalt, wat., unf.,            45       1.000       \--       1.000\*              \*1.000          \*1.000           \*1.000   \*1.000    \*1.000
                                                 recoverable, ug/L                                                                                                                          

  01042                                          Copper, wat., unf.,            44       28.000      \--       2.214\*              \*5.000          \*2.000           \*1.000   \*1.000    \*0.341
                                                 recoverable, ug/L                                                                                                                          

  01045                                          Iron, wat., unf., recoverable, 64       51000.000   72.600    1774.634             11895.000        582.250           310.000   190.000    122.500
                                                 ug/L                                                                                                                                       

  01051                                          Lead, wat., unf., recoverable, 44       7.000       \--       0.867\*              \*3.750          \*1.000           \*0.397   \*0.171    \*0.048
                                                 ug/L                                                                                                                                       

  01055                                          Manganese, wat., unf.,         64       31500.000   19.300    1456.783             8385.000         538.500           300.000   118.750    26.550
                                                 recoverable, ug/L                                                                                                                          

  71900                                          Mercury, wat., unf.,           45       \--         \--       \--                  \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01062                                          Molybdenum, wat., unf.,        45       \--         \--       \--                  \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01067                                          Nickel, wat., unf.,            43       4.000       \--       0.972\*              \*2.000          \*1.000           \*0.816   \*0.540    \*0.307
                                                 recoverable, ug/L                                                                                                                          

  01147                                          Selenium, wat., unf., ug/L     45       \--         \--       \--                  \--              \--               \--       \--        \--

  01077                                          Silver, wat., unf.,            43       \--         \--       \--                  \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01092                                          Zinc, wat., unf., recoverable, 45       20.000      \--       6.358\*              \*20.000         \*8.609           \*5.142   \*3.215    \*1.656
                                                 ug/L                                                                                                                                       

  **0208524850**[]{#__RefHeading___Toc50352694                                                                                                                                              
  .anchor} **Little River below dam near                                                                                                                                                    
  Fairntosh (October 1988--June 1991)**                                                                                                                                                     

  00080                                          Color, wat., filt., platinum   36       160.000     13.000               47.528    117.500          63.750            37.500    22.750     13.000
                                                 cobalt units                                                                                                                               

  00300                                          Dissolved oxygen, wat., unf.,  35       14.600      5.600                9.774     13.400           11.200            9.800     8.300      6.720
                                                 mg/L                                                                                                                                       

  00301                                          Dissolved oxygen, wat., unf.,  34       122.000     68.000               101.765   119.000          108.250           102.000   95.500     83.750
                                                 percent of saturation                                                                                                                      

  00400                                          pH, wat., unf., field,         35       7.750       6.400                7.097     7.702            7.300             7.100     6.900      6.400
                                                 standard units                                                                                                                             

  00403                                          pH, wat., unf., laboratory,    36       8.000       6.900                7.558     7.915            7.700             7.550     7.400      7.240
                                                 standard units                                                                                                                             

  90095                                          Specific conductance, wat.,    36       144.000     58.000               89.806    127.850          102.750           88.500    70.250     59.700
                                                 unf., laboratory, microsiemens                                                                                                             
                                                 per centimeter at 25 degrees                                                                                                               
                                                 Celsius                                                                                                                                    

  00095                                          Specific conductance, wat.,    35       135.000     54.000               86.514    131.000          100.000           87.000    68.000     57.200
                                                 unf., microsiemens per                                                                                                                     
                                                 centimeter at 25 degrees                                                                                                                   
                                                 Celsius                                                                                                                                    

  00900                                          Hardness, wat., unf., mg/L as  36       58.000      18.000               31.389    52.050           38.500            31.500    20.250     18.000
                                                 calcium carbonate                                                                                                                          

  00915                                          Calcium, wat., filt., mg/L     36       17.000      4.300                8.528     15.300           10.750            8.650     4.900      4.385

  00925                                          Magnesium, wat., filt., mg/L   36       3.700       1.700                2.428     3.530            2.875             2.300     1.925      1.785

  00935                                          Potassium, wat., filt., mg/L   36       2.700       1.200                1.956     2.530            2.275             1.900     1.700      1.285

  00931                                          Sodium adsorption ratio, wat., 36       0.400       0.300                0.336     0.400            0.400             0.300     0.300      0.300
                                                 number                                                                                                                                     

  00930                                          Sodium, wat., filt., mg/L      36       6.400       3.000                4.244     5.635            4.850             4.150     3.700      3.000

  00932                                          Sodium, wat., percent in       36       28.000      17.000               22.306    28.000           26.000            22.000    19.000     17.850
                                                 equivalents of major cations                                                                                                               

  90410                                          Acid neutralizing capacity,    36       58.000      13.000               30.167    52.900           36.500            29.500    20.000     15.550
                                                 wat., unf., fixed endpoint (pH                                                                                                             
                                                 4.5) titration, laboratory,                                                                                                                
                                                 mg/L as calcium carbonate                                                                                                                  

  00940                                          Chloride, wat., filt., mg/L    36       6.200       3.700                4.856     6.200            5.400             4.800     4.325      3.700

  00950                                          Fluoride, wat., filt., mg/L    36       0.300       \--                  0.105\*   \*0.215          \*0.100           \*0.100   \*0.063    \*0.037

  00955                                          Silica, wat., filt., mg/L      36       12.000      2.600                8.750     12.000           10.000            8.750     8.000      3.280

  00945                                          Sulfate, wat., filt., mg/L     35       13.000      3.000                5.717     12.200           6.700             5.200     4.000      3.160

  99890                                          Sulfate, wat., filt.,          7        \--         \--                  \--       \--              \--               \--       \--        \--
                                                 uncorrected, mg/L                                                                                                                          

  70300                                          Residue on evaporation, dried  35       93.000      31.000               62.800    90.600           73.000            61.000    52.000     41.400
                                                 at 180 degrees Celsius, wat.,                                                                                                              
                                                 filt., mg/L                                                                                                                                

  00608                                          Ammonia, wat., filt., mg/L as  36       0.310       \--                  0.058\*   \*0.166          \*0.070           \*0.050   \*0.030    \*0.010
                                                 nitrogen                                                                                                                                   

  00623                                          Ammonia plus organic nitrogen, 34       1.100       0.300                0.562     0.950            0.600             0.500     0.400      0.300
                                                 wat., filt., mg/L as nitrogen                                                                                                              

  00625                                          Ammonia plus organic nitrogen, 36       2.500       \--                  0.651\*   \*1.225          \*0.775           \*0.600   \*0.500    \*0.282
                                                 wat., unf., mg/L as nitrogen                                                                                                               

  00610                                          Ammonia, wat., unf., mg/L as   36       0.330       0.010                0.061     0.177            0.070             0.050     0.030      0.010
                                                 nitrogen                                                                                                                                   

  00620                                          Nitrate, wat., unf., mg/L as   18       0.390       0.080                0.235     0.390            0.280             0.265     0.180      0.080
                                                 nitrogen                                                                                                                                   

  00631                                          Nitrite plus nitrate, wat.,    36       0.400       \--                  0.214\*   \*0.400          \*0.300           \*0.200   \*0.119    \*0.075
                                                 filt., mg/L as nitrogen                                                                                                                    

  00630                                          Nitrite plus nitrate, wat.,    36       0.400       \--                  0.201\*   \*0.400          \*0.300           \*0.200   \*0.100    \*0.068
                                                 unf., mg/L as nitrogen                                                                                                                     

  00613                                          Nitrite, wat., filt., mg/L as  11       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 nitrogen                                                                                                                                   

  00615                                          Nitrite, wat., unf., mg/L as   36       0.030       \--                  0.013\*   \*0.030          \*0.020           \*0.010   \*0.007    \*0.004
                                                 nitrogen                                                                                                                                   

  00605                                          Organic nitrogen, wat., unf.,  34       2.400       0.220                0.609     1.298            0.702             0.545     0.458      0.303
                                                 mg/L                                                                                                                                       

  00666                                          Phosphorus, wat., filt., mg/L  36       0.060       \--                  0.020\*   \*0.052          \*0.030           \*0.020   \*0.009    \*0.004

  00671                                          Orthophosphate, wat., filt.,   36       0.070       \--                  0.012\*   \*0.036          \*0.020           \*0.008   \*0.004    \*0.002
                                                 mg/L as phosphorus                                                                                                                         

  70507                                          Orthophosphate, wat., unf.,    36       0.100       \--                  0.015\*   \*0.058          \*0.020           \*0.010   \*0.004    \*0.001
                                                 mg/L as phosphorus                                                                                                                         

  00665                                          Phosphorus, wat., unf., mg/L   36       0.130       0.010                0.043     0.113            0.050             0.040     0.020      0.010

  00680                                          Organic carbon, wat., unf.,    36       9.300       5.200                6.894     9.045            7.575             6.800     6.125      5.285
                                                 mg/L                                                                                                                                       

  01105                                          Aluminum, wat., unf.,          14       940.000     20.000               197.857   940.000          147.500           120.000   57.500     20.000
                                                 recoverable, ug/L                                                                                                                          

  01002                                          Arsenic, wat., unf., ug/L      14       \--         \--                  \--       \--              \--               \--       \--        \--

  01027                                          Cadmium, wat., unf., ug/L      14       \--         \--                  \--       \--              \--               \--       \--        \--

  01034                                          Chromium, wat., unf.,          14       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01037                                          Cobalt, wat., unf.,            14       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01042                                          Copper, wat., unf.,            14       7.000       1.000                2.571     7.000            3.000             2.000     1.750      1.000
                                                 recoverable, ug/L                                                                                                                          

  01045                                          Iron, wat., unf., recoverable, 14       1500.000    190.000              488.571   1500.000         587.500           375.000   240.000    190.000
                                                 ug/L                                                                                                                                       

  01051                                          Lead, wat., unf., recoverable, 14       7.000       \--                  1.356\*   \*7.000          \*1.036           \*1.000   \*0.440    \*0.193
                                                 ug/L                                                                                                                                       

  01055                                          Manganese, wat., unf.,         14       560.000     60.000               275.000   560.000          337.500           250.000   172.500    60.000
                                                 recoverable, ug/L                                                                                                                          

  71900                                          Mercury, wat., unf.,           14       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01062                                          Molybdenum, wat., unf.,        14       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01067                                          Nickel, wat., unf.,            14       5.000       \--                  1.596\*   \*5.000          \*2.250           \*1.000   \*0.548    \*0.253
                                                 recoverable, ug/L                                                                                                                          

  01147                                          Selenium, wat., unf., ug/L     14       \--         \--                  \--       \--              \--               \--       \--        \--

  01077                                          Silver, wat., unf.,            13       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01092                                          Zinc, wat., unf., recoverable, 14       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 ug/L                                                                                                                                       

  80154                                          Suspended sediment             25       31.000      1.000                9.880     28.300           14.000            8.000     4.500      1.300
                                                 concentration, mg/L                                                                                                                        

  **02085500**[]{#__RefHeading___Toc50352695                                                                                                                                                
  .anchor} **Flat River at Bahama (October                                                                                                                                                  
  1988--December 1995)**                                                                                                                                                                    

  00061                                          Discharge, instantaneous,      46       4280        0.9                  314.617   2304.001         180               65.5      23.5       1.565
                                                 cubic feet per second                                                                                                                      

  00080                                          Color, wat., filt., platinum   15       250         25                   73.8      250              110               50        29         25
                                                 cobalt units                                                                                                                               

  00300                                          Dissolved oxygen, wat., unf.,  43       13.5        3.7                  8.66      13.06            10.3              8.4       6.6        4.08
                                                 mg/L                                                                                                                                       

  00301                                          Dissolved oxygen, wat., unf.,  26       109         54                   90        107.95           99                92        85.75      58.9
                                                 percent of saturation                                                                                                                      

  00400                                          pH, wat., unf., field,         45       7.9         6                    6.931     7.47             7.2               6.9       6.75       6.19
                                                 standard units                                                                                                                             

  00403                                          pH, wat., unf., laboratory,    18       8           6.8                  7.3       8                7.425             7.3       7.1        6.8
                                                 standard units                                                                                                                             

  90095                                          Specific conductance, wat.,    18       99          55                   79.333    99               90.25             82        66.75      55
                                                 unf., laboratory, microsiemens                                                                                                             
                                                 per centimeter at 25 degrees                                                                                                               
                                                 Celsius                                                                                                                                    

  00095                                          Specific conductance, wat.,    45       101         41                   72.156    94               84.5              70        61.5       44
                                                 unf., microsiemens per                                                                                                                     
                                                 centimeter at 25 degrees                                                                                                                   
                                                 Celsius                                                                                                                                    

  00900                                          Hardness, wat., unf., mg/L as  24       29          16                   22.875    28.75            27.75             23.5      18.25      16
                                                 calcium carbonate                                                                                                                          

  00915                                          Calcium, wat., filt., mg/L     24       7.3         3.6                  5.319     7.15             6.2               5.5       4.155      3.65

  00925                                          Magnesium, wat., filt., mg/L   24       3.2         1.6                  2.326     3.175            2.775             2.305     1.825      1.625

  00935                                          Potassium, wat., filt., mg/L   24       5.8         1.07                 2.214     5.418            3.075             1.75      1.4        1.078

  00931                                          Sodium adsorption ratio, wat., 24       0.6         0.3                  0.463     0.575            0.5               0.5       0.4        0.3
                                                 number                                                                                                                                     

  00930                                          Sodium, wat., filt., mg/L      24       6.8         2.9                  5.064     6.75             5.875             5.4       4.225      2.925

  00932                                          Sodium, wat., percent in       24       35          23                   30        34.75            32.75             30        27.25      23.5
                                                 equivalents of major cations                                                                                                               

  99430                                          Carbonate, wat., unf.,         6        32          12                   19.333    32               24.5              19        12         12
                                                 incremental titration, field,                                                                                                              
                                                 mg/L as calcium carbonate                                                                                                                  

  90410                                          Acid neutralizing capacity,    18       35          9                    23.278    35               31.5              23.5      14         9
                                                 wat., unf., fixed endpoint (pH                                                                                                             
                                                 4.5) titration, laboratory,                                                                                                                
                                                 mg/L as calcium carbonate                                                                                                                  

  00410                                          Acid neutralizing capacity,    5        22          12                   \--       \--              \--               \--       \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                                             
                                                 4.5) titration, field, mg/L as                                                                                                             
                                                 calcium carbonate                                                                                                                          

  99440                                          Bicarbonate, wat., unf.,       6        39          14                   23.5      39               30                23.5      14         14
                                                 incremental titration, field,                                                                                                              
                                                 mg/L                                                                                                                                       

  00940                                          Chloride, wat., filt., mg/L    23       10          0.5                  5.457     9.52             6                 5.6       4.5        1.04

  00950                                          Fluoride, wat., filt., mg/L    24       0.3         \--                  0.103\*   \*0.300          \*0.175           \*0.072   \*0.040    \*0.017

  00955                                          Silica, wat., filt., mg/L      15       16          6.9                  11.033    16               14                11        9          6.9

  00945                                          Sulfate, wat., filt., mg/L     23       12.5        1                    5.026     12               6.5               4         3          1.12

  99890                                          Sulfate, wat., filt.,          4        \--         \--                  \--       \--              \--               \--       \--        \--
                                                 uncorrected, mg/L                                                                                                                          

  00530                                          Residue, total nonfilterable,  1        51          \--                  \--       \--              \--               \--       \--        \--
                                                 mg/L                                                                                                                                       

  70300                                          Residue on evaporation, dried  18       68          46                   58.167    68               64.25             57.5      53.5       46
                                                 at 180 degrees Celsius, wat.,                                                                                                              
                                                 filt., mg/L                                                                                                                                

  00608                                          Ammonia, wat., filt., mg/L as  9        0.1         \--                  0.041\*   \*0.100          \*0.065           \*0.030   \*0.016    \*0.009
                                                 nitrogen                                                                                                                                   

  00623                                          Ammonia plus organic nitrogen, 6        0.6         \--                  0.338\*   \*0.600          \*0.450           \*0.350   \*0.182    \*0.127
                                                 wat., filt., mg/L as nitrogen                                                                                                              

  00625                                          Ammonia plus organic nitrogen, 29       1.8         \--                  0.557\*   \*1.450          \*0.700           \*0.500   \*0.300    \*0.125
                                                 wat., unf., mg/L as nitrogen                                                                                                               

  00610                                          Ammonia, wat., unf., mg/L as   20       0.14        \--                  0.051\*   \*0.139          \*0.090           \*0.040   \*0.020    \*0.007
                                                 nitrogen                                                                                                                                   

  00620                                          Nitrate, wat., unf., mg/L as   2        0.33        0.24                 \--       \--              \--               \--       \--        \--
                                                 nitrogen                                                                                                                                   

  00631                                          Nitrite plus nitrate, wat.,    9        0.8         \--                  0.3\*     \*0.800          \*0.375           \*0.310   \*0.096    \*0.049
                                                 filt., mg/L as nitrogen                                                                                                                    

  00630                                          Nitrite plus nitrate, wat.,    20       0.6         \--                  0.321\*   \*0.590          \*0.400           \*0.320   \*0.200    \*0.155
                                                 unf., mg/L as nitrogen                                                                                                                     

  00613                                          Nitrite, wat., filt., mg/L as  6        \--         \--                  \--       \--              \--               \--       \--        \--
                                                 nitrogen                                                                                                                                   

  00615                                          Nitrite, wat., unf., mg/L as   3        0.03        0.01                 \--       \--              \--               \--       \--        \--
                                                 nitrogen                                                                                                                                   

  00605                                          Organic nitrogen, wat., unf.,  23       1.8         0.17                 0.572     1.66             0.86              0.5       0.27       0.172
                                                 mg/L                                                                                                                                       

  00666                                          Phosphorus, wat., filt., mg/L  6        0.05        \--                  0.027\*   \*0.050          \*0.043           \*0.020   \*0.017    \*0.010

  00671                                          Orthophosphate, wat., filt.,   6        0.04        \--                  0.022\*   \*0.040          \*0.025           \*0.020   \*0.018    \*0.012
                                                 mg/L as phosphorus                                                                                                                         

  70507                                          Orthophosphate, wat., unf.,    20       0.11        \--                  0.036\*   \*0.109          \*0.047           \*0.025   \*0.020    \*0.007
                                                 mg/L as phosphorus                                                                                                                         

  00665                                          Phosphorus, wat., unf., mg/L   29       0.25        0.01                 0.072     0.23             0.095             0.05      0.04       0.01

  00680                                          Organic carbon, wat., unf.,    21       27          3.3                  9.157     26.4             12                6.1       5.1        3.41
                                                 mg/L                                                                                                                                       

  01105                                          Aluminum, wat., unf.,          16       4700        140                  1203.75   4700             1550              510       240        140
                                                 recoverable, ug/L                                                                                                                          

  01002                                          Arsenic, wat., unf., ug/L      22       \--         \--                  \--       \--              \--               \--       \--        \--

  01027                                          Cadmium, wat., unf., ug/L      25       \--         \--                  \--       \--              \--               \--       \--        \--

  01034                                          Chromium, wat., unf.,          25       30          \--                  3.175\*   \*27.000         \*3.000           \*0.611   \*0.150    \*0.024
                                                 recoverable, ug/L                                                                                                                          

  01037                                          Cobalt, wat., unf.,            16       3           \--                  1.084\*   \*3.000          \*1.750           \*1.000   \*0.496    \*0.256
                                                 recoverable, ug/L                                                                                                                          

  01042                                          Copper, wat., unf.,            25       80          \--                  7.502\*   \*68.000         \*4.288           \*2.954   \*2.000    \*0.493
                                                 recoverable, ug/L                                                                                                                          

  01045                                          Iron, wat., unf., recoverable, 25       8300        480                  2320.4    8240             2825              1200      925        492
                                                 ug/L                                                                                                                                       

  01051                                          Lead, wat., unf., recoverable, 25       8           \--                  1.968\*   \*7.500          \*2.298           \*1.085   \*0.860    \*0.302
                                                 ug/L                                                                                                                                       

  01055                                          Manganese, wat., unf.,         25       860         20                   187.2     776              245               100       50         20
                                                 recoverable, ug/L                                                                                                                          

  71900                                          Mercury, wat., unf.,           25       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01062                                          Molybdenum, wat., unf.,        16       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01067                                          Nickel, wat., unf.,            23       3           \--                  1.509     \*3.000          \*2.000           \*1.110   \*0.807    \*0.466
                                                 recoverable, ug/L                                                                                                                          

  01147                                          Selenium, wat., unf., ug/L     16       \--         \--                  \--       \--              \--               \--       \--        \--

  01077                                          Silver, wat., unf.,            23       \--         \--                  \--       \--              \--               \--       \--        \--
                                                 recoverable, ug/L                                                                                                                          

  01092                                          Zinc, wat., unf., recoverable, 25       40          \--                  9.831\*   \*40.000         \*11.541          \*5.909   \*2.685    \*0.892
                                                 ug/L                                                                                                                                       

  80154                                          Suspended sediment             26       885         4                    106.423   705.45           130.25            22        9.75       4.35
                                                 concentration, mg/L                                                                                                                        

  **02086490**[]{#__RefHeading___Toc50352696                                                                                                                                                
  .anchor} **Lake Michie at dam near Bahama                                                                                                                                                 
  (October 1988--August 2001)**                                                                                                                                                             

  00080                                          Color, wat., filt., platinum   58       160.000     12.000               44.034    110.500          50.750            35.000    23.000     13.000
                                                 cobalt units                                                                                                                               

  00078                                          Transparency, wat., unf.,      38       2.500       0.450                0.931     1.645            1.000             0.850     0.750      0.545
                                                 Secchi disc, meters                                                                                                                        

  00300                                          Dissolved oxygen, wat., unf.,  73       9.680       0.080                5.903     8.993            7.555             6.600     4.975      0.275
                                                 mg/L                                                                                                                                       

  00301                                          Dissolved oxygen, wat., unf.,  73       128.000     0.700                67.119    112.000          88.500            77.000    49.500     3.000
                                                 percent of saturation                                                                                                                      

  00400                                          pH, wat., unf., field,         73       8.610       3.270                6.715     7.660            7.015             6.770     6.480      5.700
                                                 standard units                                                                                                                             

  00403                                          pH, wat., unf., laboratory,    58       8.100       6.700                7.288     8.100            7.425             7.250     7.000      6.795
                                                 standard units                                                                                                                             

  90095                                          Specific conductance, wat.,    58       84.000      52.000               70.862    83.000           77.250            70.500    65.000     53.000
                                                 unf., laboratory, microsiemens                                                                                                             
                                                 per centimeter at 25 degrees                                                                                                               
                                                 Celsius                                                                                                                                    

  00095                                          Specific conductance, wat.,    74       173.000     48.000               70.670    90.500           75.000            68.000    62.000     51.000
                                                 unf., microsiemens per                                                                                                                     
                                                 centimeter at 25 degrees                                                                                                                   
                                                 Celsius                                                                                                                                    

  00900                                          Hardness, wat., unf., mg/L as  58       26.000      15.000               20.845    25.050           23.000            21.000    19.000     15.950
                                                 calcium carbonate                                                                                                                          

  00915                                          Calcium, wat., filt., mg/L     58       6.200       3.500                4.893     6.005            5.400             4.900     4.475      3.695

  00925                                          Magnesium, wat., filt., mg/L   58       2.600       1.500                2.100     2.600            2.325             2.100     1.900      1.600

  00935                                          Potassium, wat., filt., mg/L   58       2.900       1.300                1.910     2.605            2.300             1.850     1.600      1.400

  00931                                          Sodium adsorption ratio, wat., 58       0.500       0.300                0.407     0.500            0.400             0.400     0.400      0.300
                                                 number                                                                                                                                     

  00930                                          Sodium, wat., filt., mg/L      58       5.600       2.400                4.286     5.500            4.800             4.450     3.775      3.000

  00932                                          Sodium, wat., percent in       58       32.000      22.000               28.448    31.050           30.000            29.000    27.000     24.000
                                                 equivalents of major cations                                                                                                               

  99430                                          Carbonate, wat., unf.,         26       30.000      9.000                20.615    29.650           24.000            22.500    16.000     9.350
                                                 incremental titration, field,                                                                                                              
                                                 mg/L as calcium carbonate                                                                                                                  

  90410                                          Acid neutralizing capacity,    58       30.000      10.000               21.603    29.050           26.000            22.000    17.750     11.950
                                                 wat., unf., fixed endpoint (pH                                                                                                             
                                                 4.5) titration, laboratory,                                                                                                                
                                                 mg/L as calcium carbonate                                                                                                                  

  00410                                          Acid neutralizing capacity,    29       38.000      9.000                20.707    35.000           24.500            22.000    16.500     9.500
                                                 wat., unf., fixed endpoint (pH                                                                                                             
                                                 4.5) titration, field, mg/L as                                                                                                             
                                                 calcium carbonate                                                                                                                          

  00419                                          Acid neutralizing capacity,    11       31.000      11.000               20.636    31.000           25.000            21.000    16.000     11.000
                                                 wat., unf., incremental                                                                                                                    
                                                 titration, field, mg/L as                                                                                                                  
                                                 calcium carbonate                                                                                                                          

  99440                                          Bicarbonate, wat., unf.,       37       38.000      11.000               25.159    37.100           29.000            26.000    20.000     11.900
                                                 incremental titration, field,                                                                                                              
                                                 mg/L                                                                                                                                       
  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                           **Constituent name**           Sample   Maximum     Minimum   Mean                  **Percentile**                                                                                     
  code**                                                                      size                                                                                                                                                    
  -------------------------------------------- ------------------------------ -------- ----------- --------- ---------- ---------- ---------------- ---------- ------ ---------- --------- ---------- ---------- ---------- --------- ---------
                                                                                                                                   95th                        75th              50th                 **25th**              **5th**   

  99445                                        Carbonate, wat., unf.,         11       2.000       0.000     0.182                 2.000            0.000                        0.000                0.000                 0.000     
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L                                                                                                                                                                                   

  00940                                        Chloride, wat., filt., mg/L    56       12.000      3.400     4.880                 6.745            5.350                        4.700                4.200                 3.670     

  00950                                        Fluoride, wat., filt., mg/L    56       0.200       \--       0.097\*               \*0.200          \*0.100                      \*0.089              \*0.068               \*0.045   

  00955                                        Silica, wat., filt., mg/L      56       12.000      6.700     9.289                 11.150           10.000                       9.600                8.500                 6.785     

  00945                                        Sulfate, wat., filt., mg/L     56       13.000      0.300     4.048                 6.220            4.300                        3.850                3.125                 2.600     

  99890                                        Sulfate, wat., filt.,          3        \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               uncorrected, mg/L                                                                                                                                                                      

  70300                                        Residue on evaporation, dried  56       67.000      2.000     50.982                66.000           58.000                       54.500               46.000                26.800    
                                               at 180 degrees Celsius, wat.,                                                                                                                                                          
                                               filt., mg/L                                                                                                                                                                            

  00608                                        Ammonia, wat., filt., mg/L as  64       3.100       \--       0.121\*               \*0.317          \*0.106                      \*0.050              \*0.017               \*0.005   
                                               nitrogen                                                                                                                                                                               

  00623                                        Ammonia plus organic nitrogen, 37       1.100       \--       0.440\*               \*0.740          \*0.500                      \*0.400              \*0.350               \*0.197   
                                               wat., filt., mg/L as nitrogen                                                                                                                                                          

  00625                                        Ammonia plus organic nitrogen, 64       4.300       0.300     0.631                 0.900            0.675                        0.550                0.500                 0.300     
                                               wat., unf., mg/L as nitrogen                                                                                                                                                           

  00610                                        Ammonia, wat., unf., mg/L as   18       0.220       0.010     0.076                 0.220            0.110                        0.075                0.020                 0.010     
                                               nitrogen                                                                                                                                                                               

  00620                                        Nitrate, wat., unf., mg/L as   5        0.280       0.160     \--                   \--              \--                          \--                  \--                   \--       
                                               nitrogen                                                                                                                                                                               

  00631                                        Nitrite plus nitrate, wat.,    64       0.430       \--       0.069\*               \*0.315          \*0.108                      \*0.014              \*0.005               \*0.001   
                                               filt., mg/L as nitrogen                                                                                                                                                                

  00630                                        Nitrite plus nitrate, wat.,    18       0.300       \--       0.098\*               \*0.300          \*0.178                      \*0.053              \*0.026               \*0.012   
                                               unf., mg/L as nitrogen                                                                                                                                                                 

  00613                                        Nitrite, wat., filt., mg/L as  54       0.043       \--       0.005\*               \*0.024          \*0.005                      \*0.002              \*0.001               \*0.000   
                                               nitrogen                                                                                                                                                                               

  00615                                        Nitrite, wat., unf., mg/L as   18       0.030       \--       0.008\*               \*0.030          \*0.010                      \*0.005              \*0.003               \*0.001   
                                               nitrogen                                                                                                                                                                               

  00605                                        Organic nitrogen, wat., unf.,  60       1.200       0.280     0.511                 0.889            0.587                        0.470                0.410                 0.312     
                                               mg/L                                                                                                                                                                                   

  00666                                        Phosphorus, wat., filt., mg/L  38       0.060       \--       0.016\*               \*0.050          \*0.020                      \*0.010              \*0.006               \*0.003   

  00671                                        Orthophosphate, wat., filt.,   63       0.030       \--       0.004\*               \*0.019          \*0.004                      \*0.002              \*0.001               \*0.000   
                                               mg/L as phosphorus                                                                                                                                                                     

  70507                                        Orthophosphate, wat., unf.,    18       0.060       \--       0.015\*               \*0.060          \*0.022                      \*0.008              \*0.002               \*0.001   
                                               mg/L as phosphorus                                                                                                                                                                     

  00665                                        Phosphorus, wat., unf., mg/L   64       0.390       \--       0.042\*               \*0.120          \*0.040                      \*0.030              \*0.020               \*0.010   

  00680                                        Organic carbon, wat., unf.,    55       15.000      2.100     7.985                 12.400           8.900                        7.600                6.700                 5.440     
                                               mg/L                                                                                                                                                                                   

  70953                                        Chlorophyll a, phytoplankton,  58       27.400      0.500     7.426                 23.000           10.300                       5.650                3.375                 0.795     
                                               chromatographic-fluorometric                                                                                                                                                           
                                               method, ug/L                                                                                                                                                                           

  70954                                        Chlorophyll b, phytoplankton,  58       2.200       \--       0.305\*               \*1.205          \*0.300                      \*0.187              \*0.096               \*0.040   
                                               chromatographic-fluorometric                                                                                                                                                           
                                               method, ug/L                                                                                                                                                                           

  01105                                        Aluminum, wat., unf.,          45       4000.000    10.000    248.387               929.300          200.000                      80.000               60.000                23.000    
                                               recoverable, ug/L                                                                                                                                                                      

  01002                                        Arsenic, wat., unf., ug/L      45       \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01027                                        Cadmium, wat., unf., ug/L      45       \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01034                                        Chromium, wat., unf.,          45       210.000     \--       5.963\*               \*21.100         \*1.000                      \*0.316              \*0.071               \*0.008   
                                               recoverable, ug/L                                                                                                                                                                      

  01037                                        Cobalt, wat., unf.,            45       2.000       \--       0.678\*               \*1.000          \*0.821                      \*0.625              \*0.475               \*0.325   
                                               recoverable, ug/L                                                                                                                                                                      

  01042                                        Copper, wat., unf.,            44       6.000       \--       2.381\*               \*5.000          \*3.000                      \*2.000              \*1.000               \*0.704   
                                               recoverable, ug/L                                                                                                                                                                      

  01045                                        Iron, wat., unf., recoverable, 64       34000.000   109.000   1779.125              7675.000         1000.000                     590.000              257.500               119.250   
                                               ug/L                                                                                                                                                                                   

  01051                                        Lead, wat., unf., recoverable, 45       5.000       \--       1.012\*               \*3.700          \*1.000                      \*0.651              \*0.352               \*0.136   
                                               ug/L                                                                                                                                                                                   

  01055                                        Manganese, wat., unf.,         64       3660.000    18.600    358.327               1585.000         400.750                      121.000              45.650                23.875    
                                               recoverable, ug/L                                                                                                                                                                      

  71900                                        Mercury, wat., unf.,           44       \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01062                                        Molybdenum, wat., unf.,        45       4.000       \--       0.428\*               \*2.000          \*0.442                      \*0.186              \*0.084               \*0.022   
                                               recoverable, ug/L                                                                                                                                                                      

  01067                                        Nickel, wat., unf.,            45       39.000      \--       2.072\*               \*5.700          \*2.000                      \*1.000              \*0.301               \*0.087   
                                               recoverable, ug/L                                                                                                                                                                      

  01147                                        Selenium, wat., unf., ug/L     45       \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01077                                        Silver, wat., unf.,            44       \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01092                                        Zinc, wat., unf., recoverable, 45       20.000      \--       4.998\*               \*15.740         \*6.428                      \*3.827              \*2.266               \*1.064   
                                               ug/L                                                                                                                                                                                   

  **02086500**[]{#__RefHeading___Toc50352697                                                                                                                                                                                          
  .anchor} **Flat River at dam near Bahama                                                                                                                                                                                            
  (October 1988--March 1993)**                                                                                                                                                                                                        

  00061                                        Discharge, instantaneous,      34       2420.000    0.010     202.246    1024.250                    193.000                      84.000               36.500                0.018     
                                               cubic feet per second                                                                                                                                                                  

  00080                                        Color, wat., filt., platinum   35       170.000     20.000    78.057     154.000                     110.000                      65.000               55.000                25.600    
                                               cobalt units                                                                                                                                                                           

  00300                                        Dissolved oxygen, wat., unf.,  34       13.300      2.400     8.047      12.550                      10.050                       8.350                6.375                 2.700     
                                               mg/L                                                                                                                                                                                   

  00301                                        Dissolved oxygen, wat., unf.,  33       106.000     26.000    79.333     105.300                     98.000                       86.000               64.000                28.100    
                                               percent of saturation                                                                                                                                                                  

  00400                                        pH, wat., unf., field,         35       7.970       5.700     6.891      7.434                       7.200                        7.000                6.600                 6.020     
                                               standard units                                                                                                                                                                         

  00403                                        pH, wat., unf., laboratory,    35       8.300       6.600     7.157      7.820                       7.300                        7.100                6.900                 6.680     
                                               standard units                                                                                                                                                                         

  90095                                        Specific conductance, wat.,    35       104.000     45.000    69.657     99.200                      79.000                       66.000               59.000                52.200    
                                               unf., laboratory, microsiemens                                                                                                                                                         
                                               per centimeter at 25 degrees                                                                                                                                                           
                                               Celsius                                                                                                                                                                                

  00095                                        Specific conductance, wat.,    35       105.000     40.000    67.514     101.000                     76.000                       65.000               57.000                42.400    
                                               unf., microsiemens per                                                                                                                                                                 
                                               centimeter at 25 degrees                                                                                                                                                               
                                               Celsius                                                                                                                                                                                

  00900                                        Hardness, wat., unf., mg/L as  35       35.000      14.000    20.486     34.200                      22.000                       20.000               17.000                14.800    
                                               calcium carbonate                                                                                                                                                                      

  00915                                        Calcium, wat., filt., mg/L     35       9.400       3.400     4.869      8.920                       5.200                        4.700                4.000                 3.400     

  00925                                        Magnesium, wat., filt., mg/L   35       3.100       1.300     2.020      2.940                       2.300                        1.900                1.700                 1.460     

  00935                                        Potassium, wat., filt., mg/L   35       3.000       1.200     1.997      2.920                       2.400                        1.900                1.600                 1.360     

  00931                                        Sodium adsorption ratio, wat., 35       0.500       0.200     0.403      0.500                       0.400                        0.400                0.400                 0.280     
                                               number                                                                                                                                                                                 

  00930                                        Sodium, wat., filt., mg/L      35       6.300       2.100     4.220      5.660                       4.800                        4.100                3.600                 2.900     

  00932                                        Sodium, wat., percent in       35       34.000      21.000    28.543     32.400                      31.000                       28.000               27.000                22.600    
                                               equivalents of major cations                                                                                                                                                           

  99430                                        Carbonate, wat., unf.,         1        4.000       \--       \--        \--                         \--                          \--                  \--                   \--       
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L as calcium carbonate                                                                                                                                                              

  90410                                        Acid neutralizing capacity,    35       39.000      8.000     17.954     36.600                      20.000                       17.000               13.000                8.800     
                                               wat., unf., fixed endpoint (pH                                                                                                                                                         
                                               4.5) titration, laboratory,                                                                                                                                                            
                                               mg/L as calcium carbonate                                                                                                                                                              

  00410                                        Acid neutralizing capacity,    1        10.000      \--       \--        \--                         \--                          \--                  \--                   \--       
                                               wat., unf., fixed endpoint (pH                                                                                                                                                         
                                               4.5) titration, field, mg/L as                                                                                                                                                         
                                               calcium carbonate                                                                                                                                                                      

  99440                                        Bicarbonate, wat., unf.,       1        5.000       \--       \--        \--                         \--                          \--                  \--                   \--       
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L                                                                                                                                                                                   

  99445                                        Carbonate, wat., unf.,         1        0.000       \--       \--        \--                         \--                          \--                  \--                   \--       
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L                                                                                                                                                                                   

  00940                                        Chloride, wat., filt., mg/L    35       6.700       3.400     4.874      6.460                       5.500                        4.700                4.200                 3.560     

  00950                                        Fluoride, wat., filt., mg/L    35       0.400       \--       0.112\*    \*0.320                     \*0.100                      \*0.100              \*0.061               \*0.034   

  00955                                        Silica, wat., filt., mg/L      35       12.000      4.800     9.329      12.000                      11.000                       9.800                8.300                 5.360     

  00945                                        Sulfate, wat., filt., mg/L     33       9.200       2.900     5.706      9.200                       6.950                        5.400                4.450                 2.970     

  99890                                        Sulfate, wat., filt.,          6        \--         \--       \--        \--                         \--                          \--                  \--                   \--       
                                               uncorrected, mg/L                                                                                                                                                                      

  70300                                        Residue on evaporation, dried  34       70.000      28.000    52.824     67.750                      59.250                       53.500               49.250                28.750    
                                               at 180 degrees Celsius, wat.,                                                                                                                                                          
                                               filt., mg/L                                                                                                                                                                            

  00608                                        Ammonia, wat., filt., mg/L as  33       0.310       0.010     0.107      0.296                       0.155                        0.090                0.045                 0.010     
                                               nitrogen                                                                                                                                                                               

  00623                                        Ammonia plus organic nitrogen, 30       1.000       0.300     0.603                 1.000            0.700                        0.600                0.500                 0.300     
                                               wat., filt., mg/L as nitrogen                                                                                                                                                          

  00625                                        Ammonia plus organic nitrogen, 35       1.000       0.200     0.626                 0.920            0.700                        0.600                0.500                 0.280     
                                               wat., unf., mg/L as nitrogen                                                                                                                                                           

  00610                                        Ammonia, wat., unf., mg/L as   33       0.330       \--       0.117\*               \*0.295          \*0.165                      \*0.100              \*0.060               \*0.019   
                                               nitrogen                                                                                                                                                                               

  00620                                        Nitrate, wat., unf., mg/L as   24       0.490       0.040     0.242                 0.488            0.377                        0.205                0.162                 0.050     
                                               nitrogen                                                                                                                                                                               

  00631                                        Nitrite plus nitrate, wat.,    35       0.460       \--       0.245\*               \*0.444          \*0.400                      \*0.200              \*0.130               \*0.081   
                                               filt., mg/L as nitrogen                                                                                                                                                                

  00630                                        Nitrite plus nitrate, wat.,    34       0.500       \--       0.232\*               \*0.425          \*0.400                      \*0.200              \*0.100               \*0.068   
                                               unf., mg/L as nitrogen                                                                                                                                                                 

  00613                                        Nitrite, wat., filt., mg/L as  10       0.010       \--       0.010\*               \*0.010          \*0.010                      \*0.010              \*0.010               \*0.010   
                                               nitrogen                                                                                                                                                                               

  00615                                        Nitrite, wat., unf., mg/L as   34       0.040       \--       0.015\*               \*0.040          \*0.020                      \*0.010              \*0.009               \*0.004   
                                               nitrogen                                                                                                                                                                               

  00605                                        Organic nitrogen, wat., unf.,  34       0.940       0.220     0.517                 0.902            0.610                        0.485                0.412                 0.228     
                                               mg/L                                                                                                                                                                                   

  00666                                        Phosphorus, wat., filt., mg/L  35       0.270       \--       0.032\*               \*0.118          \*0.030                      \*0.020              \*0.020               \*0.006   

  00671                                        Orthophosphate, wat., filt.,   35       0.240       \--       0.022\*               \*0.112          \*0.030                      \*0.010              \*0.004               \*0.001   
                                               mg/L as phosphorus                                                                                                                                                                     

  70507                                        Orthophosphate, wat., unf.,    34       0.100       \--       0.025\*               \*0.085          \*0.030                      \*0.020              \*0.009               \*0.004   
                                               mg/L as phosphorus                                                                                                                                                                     

  00665                                        Phosphorus, wat., unf., mg/L   35       0.180       0.020     0.054                 0.148            0.060                        0.050                0.030                 0.020     

  00680                                        Organic carbon, wat., unf.,    34       12.000      4.600     7.612                 10.350           8.800                        7.750                6.150                 4.900     
                                               mg/L                                                                                                                                                                                   

  01105                                        Aluminum, wat., unf.,          14       3000.000    30.000    604.286               3000.000         732.500                      485.000              135.000               30.000    
                                               recoverable, ug/L                                                                                                                                                                      

  01002                                        Arsenic, wat., unf., ug/L      14       \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01027                                        Cadmium, wat., unf., ug/L      14       \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01034                                        Chromium, wat., unf.,          14       3.000       \--       1.088\*               \*3.000          \*2.000                      \*0.801              \*0.461               \*0.232   
                                               recoverable, ug/L                                                                                                                                                                      

  01037                                        Cobalt, wat., unf.,            14       2.000       \--       0.840\*               \*2.000          \*1.000                      \*0.666              \*0.422               \*0.239   
                                               recoverable, ug/L                                                                                                                                                                      

  01042                                        Copper, wat., unf.,            14       5.000       2.000     3.357                 5.000            4.000                        3.000                2.750                 2.000     
                                               recoverable, ug/L                                                                                                                                                                      

  01045                                        Iron, wat., unf., recoverable, 14       3400.000    390.000   1080.714              3400.000         1250.000                     855.000              612.500               390.000   
                                               ug/L                                                                                                                                                                                   

  01051                                        Lead, wat., unf., recoverable, 14       7.000       \--       1.958\*               \*7.000          \*2.250                      \*1.494              \*1.000               \*0.426   
                                               ug/L                                                                                                                                                                                   

  01055                                        Manganese, wat., unf.,         14       580.000     70.000    217.857               580.000          345.000                      140.000              77.500                70.000    
                                               recoverable, ug/L                                                                                                                                                                      

  71900                                        Mercury, wat., unf.,           14       \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01062                                        Molybdenum, wat., unf.,        14       \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01067                                        Nickel, wat., unf.,            14       5.000       \--       2.039\*               \*5.000          \*2.000                      \*2.000              \*1.000               \*0.547   
                                               recoverable, ug/L                                                                                                                                                                      

  01147                                        Selenium, wat., unf., ug/L     14       \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01077                                        Silver, wat., unf.,            13       \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01092                                        Zinc, wat., unf., recoverable, 14       \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               ug/L                                                                                                                                                                                   

  80154                                        Suspended sediment             31       59.000      2.000     17.290                56.000           24.000                       8.000                6.000                 2.000     
                                               concentration, mg/L                                                                                                                                                                    

  **02086624**[]{#__RefHeading___Toc50352698                                                                                                                                                                                          
  .anchor} **Knap of Reeds Creek near Butner                                                                                                                                                                                          
  (October 1988--April 1995)**                                                                                                                                                                                                        

  00061                                        Discharge, instantaneous,      18       536.000     3.200     43.617                536.000          21.500                       7.500                5.175                 3.200     
                                               cubic feet per second                                                                                                                                                                  

  00080                                        Color, wat., filt., platinum   1        110.000     \--       \--                   \--              \--                          \--                  \--                   \--       
                                               cobalt units                                                                                                                                                                           

  00300                                        Dissolved oxygen, wat., unf.,  18       9.400       5.600     7.322                 9.400            8.250                        7.400                6.250                 5.600     
                                               mg/L                                                                                                                                                                                   

  00301                                        Dissolved oxygen, wat., unf.,  1        80.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               percent of saturation                                                                                                                                                                  

  00400                                        pH, wat., unf., field,         18       7.200       6.400     6.873                 7.200            7.000                        6.900                6.745                 6.400     
                                               standard units                                                                                                                                                                         

  00403                                        pH, wat., unf., laboratory,    1        6.600       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               standard units                                                                                                                                                                         

  90095                                        Specific conductance, wat.,    1        67.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               unf., laboratory, microsiemens                                                                                                                                                         
                                               per centimeter at 25 degrees                                                                                                                                                           
                                               Celsius                                                                                                                                                                                

  00095                                        Specific conductance, wat.,    17       633.000     29.000    229.118               633.000          345.000                      161.000              91.500                29.000    
                                               unf., microsiemens per                                                                                                                                                                 
                                               centimeter at 25 degrees                                                                                                                                                               
                                               Celsius                                                                                                                                                                                

  00900                                        Hardness, wat., unf., mg/L as  1        19.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               calcium carbonate                                                                                                                                                                      

  00915                                        Calcium, wat., filt., mg/L     1        4.500       \--       \--                   \--              \--                          \--                  \--                   \--       

  00925                                        Magnesium, wat., filt., mg/L   1        1.900       \--       \--                   \--              \--                          \--                  \--                   \--       

  00935                                        Potassium, wat., filt., mg/L   1        2.400       \--       \--                   \--              \--                          \--                  \--                   \--       

  00931                                        Sodium adsorption ratio, wat., 1        0.400       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               number                                                                                                                                                                                 

  00930                                        Sodium, wat., filt., mg/L      1        3.600       \--       \--                   \--              \--                          \--                  \--                   \--       

  00932                                        Sodium, wat., percent in       1        26.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               equivalents of major cations                                                                                                                                                           

  99430                                        Carbonate, wat., unf.,         1        14.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L as calcium carbonate                                                                                                                                                              

  90410                                        Acid neutralizing capacity,    1        17.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               wat., unf., fixed endpoint (pH                                                                                                                                                         
                                               4.5) titration, laboratory,                                                                                                                                                            
                                               mg/L as calcium carbonate                                                                                                                                                              

  00410                                        Acid neutralizing capacity,    1        14.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               wat., unf., fixed endpoint (pH                                                                                                                                                         
                                               4.5) titration, field, mg/L as                                                                                                                                                         
                                               calcium carbonate                                                                                                                                                                      

  99440                                        Bicarbonate, wat., unf.,       1        17.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L                                                                                                                                                                                   

  99445                                        Carbonate, wat., unf.,         1        0.000       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L                                                                                                                                                                                   

  00940                                        Chloride, wat., filt., mg/L    1        4.300       \--       \--                   \--              \--                          \--                  \--                   \--       

  00950                                        Fluoride, wat., filt., mg/L    1        0.100       \--       \--                   \--              \--                          \--                  \--                   \--       

  00955                                        Silica, wat., filt., mg/L      1        4.400       \--       \--                   \--              \--                          \--                  \--                   \--       

  00945                                        Sulfate, wat., filt., mg/L     1        7.300       \--       \--                   \--              \--                          \--                  \--                   \--       

  70300                                        Residue on evaporation, dried  1        42.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               at 180 degrees Celsius, wat.,                                                                                                                                                          
                                               filt., mg/L                                                                                                                                                                            

  00608                                        Ammonia, wat., filt., mg/L as  1        0.110       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               nitrogen                                                                                                                                                                               

  00623                                        Ammonia plus organic nitrogen, 1        0.500       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               wat., filt., mg/L as nitrogen                                                                                                                                                          

  00625                                        Ammonia plus organic nitrogen, 1        2.000       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               wat., unf., mg/L as nitrogen                                                                                                                                                           

  00631                                        Nitrite plus nitrate, wat.,    1        0.290       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               filt., mg/L as nitrogen                                                                                                                                                                

  00613                                        Nitrite, wat., filt., mg/L as  1        \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               nitrogen                                                                                                                                                                               

  00605                                        Organic nitrogen, wat., unf.,  1        1.900       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               mg/L                                                                                                                                                                                   

  00666                                        Phosphorus, wat., filt., mg/L  1        0.020       \--       \--                   \--              \--                          \--                  \--                   \--       

  00671                                        Orthophosphate, wat., filt.,   1        0.010       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               mg/L as phosphorus                                                                                                                                                                     

  00665                                        Phosphorus, wat., unf., mg/L   1        0.470       \--       \--                   \--              \--                          \--                  \--                   \--       

  00680                                        Organic carbon, wat., unf.,    1        6.500       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               mg/L                                                                                                                                                                                   

  01105                                        Aluminum, wat., unf.,          1        24000.000   \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01002                                        Arsenic, wat., unf., ug/L      1        2.000       \--       \--                   \--              \--                          \--                  \--                   \--       

  01027                                        Cadmium, wat., unf., ug/L      1        \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01034                                        Chromium, wat., unf.,          1        8.000       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01037                                        Cobalt, wat., unf.,            1        20.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01042                                        Copper, wat., unf.,            1        35.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01045                                        Iron, wat., unf., recoverable, 1        18000.000   \--       \--                   \--              \--                          \--                  \--                   \--       
                                               ug/L                                                                                                                                                                                   

  01051                                        Lead, wat., unf., recoverable, 1        18.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               ug/L                                                                                                                                                                                   

  01055                                        Manganese, wat., unf.,         1        2100.000    \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  71900                                        Mercury, wat., unf.,           1        0.100       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01062                                        Molybdenum, wat., unf.,        1        4.000       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01067                                        Nickel, wat., unf.,            1        21.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01147                                        Selenium, wat., unf., ug/L     1        \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01077                                        Silver, wat., unf.,            1        \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01092                                        Zinc, wat., unf., recoverable, 1        100.000     \--       \--                   \--              \--                          \--                  \--                   \--       
                                               ug/L                                                                                                                                                                                   

  80154                                        Suspended sediment             1        851.000     \--       \--                   \--              \--                          \--                  \--                   \--       
                                               concentration, mg/L                                                                                                                                                                    

  **02086849**[]{#__RefHeading___Toc50352699                                                                                                                                                                                          
  .anchor} **Ellerbe Creek near Gorman                                                                                                                                                                                                
  (October 1988--April 1995)**                                                                                                                                                                                                        

  00061                                        Discharge, instantaneous,      14       672.000     4.300     94.393                672.000          56.250                       19.500               11.400                4.300     
                                               cubic feet per second                                                                                                                                                                  

  00080                                        Color, wat., filt., platinum   2        100.000     45.000    \--                   \--              \--                          \--                  \--                   \--       
                                               cobalt units                                                                                                                                                                           

  00300                                        Dissolved oxygen, wat., unf.,  20       9.600       5.600     7.478                 9.585            8.400                        7.525                6.350                 5.610     
                                               mg/L                                                                                                                                                                                   

  00301                                        Dissolved oxygen, wat., unf.,  3        81.000      71.000    \--                   \--              \--                          \--                  \--                   \--       
                                               percent of saturation                                                                                                                                                                  

  00400                                        pH, wat., unf., field,         21       7.420       6.740     7.131                 7.418            7.300                        7.200                7.040                 6.744     
                                               standard units                                                                                                                                                                         

  00403                                        pH, wat., unf., laboratory,    2        7.400       7.300     \--                   \--              \--                          \--                  \--                   \--       
                                               standard units                                                                                                                                                                         

  90095                                        Specific conductance, wat.,    2        382.000     176.000   \--                   \--              \--                          \--                  \--                   \--       
                                               unf., laboratory, microsiemens                                                                                                                                                         
                                               per centimeter at 25 degrees                                                                                                                                                           
                                               Celsius                                                                                                                                                                                

  00095                                        Specific conductance, wat.,    20       490.000     86.000    330.400               489.500          429.500                      363.500              237.750               87.200    
                                               unf., microsiemens per                                                                                                                                                                 
                                               centimeter at 25 degrees                                                                                                                                                               
                                               Celsius                                                                                                                                                                                

  00900                                        Hardness, wat., unf., mg/L as  2        74.000      42.000    \--                   \--              \--                          \--                  \--                   \--       
                                               calcium carbonate                                                                                                                                                                      

  00915                                        Calcium, wat., filt., mg/L     2        19.000      12.000    \--                   \--              \--                          \--                  \--                   \--       

  00925                                        Magnesium, wat., filt., mg/L   2        6.500       2.800     \--                   \--              \--                          \--                  \--                   \--       

  00935                                        Potassium, wat., filt., mg/L   2        6.600       3.200     \--                   \--              \--                          \--                  \--                   \--       

  00931                                        Sodium adsorption ratio, wat., 2        2.000       1.000     \--                   \--              \--                          \--                  \--                   \--       
                                               number                                                                                                                                                                                 

  00930                                        Sodium, wat., filt., mg/L      2        44.000      15.000    \--                   \--              \--                          \--                  \--                   \--       

  00932                                        Sodium, wat., percent in       2        54.000      42.000    \--                   \--              \--                          \--                  \--                   \--       
                                               equivalents of major cations                                                                                                                                                           

  99430                                        Carbonate, wat., unf.,         1        27.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L as calcium carbonate                                                                                                                                                              

  90410                                        Acid neutralizing capacity,    2        68.000      32.000    \--                   \--              \--                          \--                  \--                   \--       
                                               wat., unf., fixed endpoint (pH                                                                                                                                                         
                                               4.5) titration, laboratory,                                                                                                                                                            
                                               mg/L as calcium carbonate                                                                                                                                                              

  00410                                        Acid neutralizing capacity,    1        26.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               wat., unf., fixed endpoint (pH                                                                                                                                                         
                                               4.5) titration, field, mg/L as                                                                                                                                                         
                                               calcium carbonate                                                                                                                                                                      

  99440                                        Bicarbonate, wat., unf.,       1        33.000      \--       \--                   \--              \--                          \--                  \--                   \--       
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L                                                                                                                                                                                   

  99445                                        Carbonate, wat., unf.,         1        0.000       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L                                                                                                                                                                                   

  00940                                        Chloride, wat., filt., mg/L    2        31.000      13.000    \--                   \--              \--                          \--                  \--                   \--       

  00950                                        Fluoride, wat., filt., mg/L    2        0.700       0.300     \--                   \--              \--                          \--                  \--                   \--       

  00955                                        Silica, wat., filt., mg/L      2        9.200       7.100     \--                   \--              \--                          \--                  \--                   \--       

  00945                                        Sulfate, wat., filt., mg/L     2        30.000      18.000    \--                   \--              \--                          \--                  \--                   \--       

  70300                                        Residue on evaporation, dried  2        226.000     124.000   \--                   \--              \--                          \--                  \--                   \--       
                                               at 180 degrees Celsius, wat.,                                                                                                                                                          
                                               filt., mg/L                                                                                                                                                                            

  00608                                        Ammonia, wat., filt., mg/L as  2        0.140       0.120     \--                   \--              \--                          \--                  \--                   \--       
                                               nitrogen                                                                                                                                                                               

  00623                                        Ammonia plus organic nitrogen, 2        1.000       0.700     \--                   \--              \--                          \--                  \--                   \--       
                                               wat., filt., mg/L as nitrogen                                                                                                                                                          

  00625                                        Ammonia plus organic nitrogen, 2        1.400       0.700     \--                   \--              \--                          \--                  \--                   \--       
                                               wat., unf., mg/L as nitrogen                                                                                                                                                           

  00610                                        Ammonia, wat., unf., mg/L as   1        0.130       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               nitrogen                                                                                                                                                                               

  00620                                        Nitrate, wat., unf., mg/L as   1        9.240       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               nitrogen                                                                                                                                                                               

  00631                                        Nitrite plus nitrate, wat.,    2        9.300       2.900     \--                   \--              \--                          \--                  \--                   \--       
                                               filt., mg/L as nitrogen                                                                                                                                                                

  00630                                        Nitrite plus nitrate, wat.,    1        9.300       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               unf., mg/L as nitrogen                                                                                                                                                                 

  00613                                        Nitrite, wat., filt., mg/L as  2        0.060       0.030     \--                   \--              \--                          \--                  \--                   \--       
                                               nitrogen                                                                                                                                                                               

  00615                                        Nitrite, wat., unf., mg/L as   1        0.060       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               nitrogen                                                                                                                                                                               

  00605                                        Organic nitrogen, wat., unf.,  2        1.300       0.560     \--                   \--              \--                          \--                  \--                   \--       
                                               mg/L                                                                                                                                                                                   

  00666                                        Phosphorus, wat., filt., mg/L  2        0.600       0.060     \--                   \--              \--                          \--                  \--                   \--       

  00671                                        Orthophosphate, wat., filt.,   2        0.560       0.050     \--                   \--              \--                          \--                  \--                   \--       
                                               mg/L as phosphorus                                                                                                                                                                     

  70507                                        Orthophosphate, wat., unf.,    1        0.630       \--       \--                   \--              \--                          \--                  \--                   \--       
                                               mg/L as phosphorus                                                                                                                                                                     

  00665                                        Phosphorus, wat., unf., mg/L   2        0.790       0.110     \--                   \--              \--                          \--                  \--                   \--       

  00680                                        Organic carbon, wat., unf.,    2        11.000      11.000    \--                   \--              \--                          \--                  \--                   \--       
                                               mg/L                                                                                                                                                                                   

  01105                                        Aluminum, wat., unf.,          2        1500.000    440.000   \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01002                                        Arsenic, wat., unf., ug/L      2        \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01027                                        Cadmium, wat., unf., ug/L      2        \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01034                                        Chromium, wat., unf.,          2        3.000       1.000     \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01037                                        Cobalt, wat., unf.,            2        2.000       2.000     \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01042                                        Copper, wat., unf.,            2        9.000       4.000     \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01045                                        Iron, wat., unf., recoverable, 2        1800.000    820.000   \--                   \--              \--                          \--                  \--                   \--       
                                               ug/L                                                                                                                                                                                   

  01051                                        Lead, wat., unf., recoverable, 2        4.000       3.000     \--                   \--              \--                          \--                  \--                   \--       
                                               ug/L                                                                                                                                                                                   

  01055                                        Manganese, wat., unf.,         2        140.000     130.000   \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  71900                                        Mercury, wat., unf.,           2        \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01062                                        Molybdenum, wat., unf.,        2        7.000       1.000     \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01067                                        Nickel, wat., unf.,            2        \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01147                                        Selenium, wat., unf., ug/L     2        \--         \--       \--                   \--              \--                          \--                  \--                   \--       

  01077                                        Silver, wat., unf.,            2        \--         \--       \--                   \--              \--                          \--                  \--                   \--       
                                               recoverable, ug/L                                                                                                                                                                      

  01092                                        Zinc, wat., unf., recoverable, 2        50.000      30.000    \--                   \--              \--                          \--                  \--                   \--       
                                               ug/L                                                                                                                                                                                   

  80154                                        Suspended sediment             3        351.000     21.000    \--                   \--              \--                          \--                  \--                   \--       
                                               concentration, mg/L                                                                                                                                                                    

  **02086920**[]{#__RefHeading___Toc50352700                                                                                                                                                                                          
  .anchor} **Falls Lake at I-85 near Redwood                                                                                                                                                                                          
  (October 1988--July 1995)**                                                                                                                                                                                                         

  00080                                        Color, wat., filt., platinum   17       140.000     25.000    68.706                140.000                            78.000               64.000                51.500               25.000
                                               cobalt units                                                                                                                                                                           

  00078                                        Transparency, wat., unf.,      13       0.750       0.100     0.488                 0.750                              0.700                0.500                 0.300                0.100
                                               Secchi disc, meters                                                                                                                                                                    

  00300                                        Dissolved oxygen, wat., unf.,  24       12.600      1.400     7.517                 12.500                             9.325                7.100                 6.325                2.250
                                               mg/L                                                                                                                                                                                   

  00301                                        Dissolved oxygen, wat., unf.,  16       116.000     18.000    77.500                116.000                            90.250               83.000                68.500               18.000
                                               percent of saturation                                                                                                                                                                  

  00400                                        pH, wat., unf., field,         26       9.210       6.400     7.187                 9.101                              7.200                7.000                 6.800                6.400
                                               standard units                                                                                                                                                                         

  00403                                        pH, wat., unf., laboratory,    17       9.300       6.700     7.447                 9.300                              7.700                7.300                 7.050                6.700
                                               standard units                                                                                                                                                                         

  90095                                        Specific conductance, wat.,    17       410.000     105.000   205.353               410.000                            241.500              193.000               137.000              105.000
                                               unf., laboratory, microsiemens                                                                                                                                                         
                                               per centimeter at 25 degrees                                                                                                                                                           
                                               Celsius                                                                                                                                                                                

  00095                                        Specific conductance, wat.,    26       404.000     71.000    176.077               396.650                            245.000              144.500               108.000              71.350
                                               unf., microsiemens per                                                                                                                                                                 
                                               centimeter at 25 degrees                                                                                                                                                               
                                               Celsius                                                                                                                                                                                

  00900                                        Hardness, wat., unf., mg/L as  17       58.000      23.000    36.000                58.000                             40.000               34.000                31.000               23.000
                                               calcium carbonate                                                                                                                                                                      

  00915                                        Calcium, wat., filt., mg/L     17       16.000      5.600     9.218                 16.000                             10.350               8.400                 7.650                5.600

  00925                                        Magnesium, wat., filt., mg/L   17       5.600       2.100     3.135                 5.600                              3.400                3.000                 2.550                2.100

  00935                                        Potassium, wat., filt., mg/L   17       7.300       2.500     3.782                 7.300                              4.450                3.300                 2.900                2.500

  00931                                        Sodium adsorption ratio, wat., 17       3.000       0.500     1.612                 3.000                              2.000                2.000                 1.000                0.500
                                               number                                                                                                                                                                                 

  00930                                        Sodium, wat., filt., mg/L      17       53.000      7.000     23.706                53.000                             29.000               23.000                14.000               7.000

  00932                                        Sodium, wat., percent in       17       63.000      30.000    53.235                63.000                             61.000               55.000                48.000               30.000
                                               equivalents of major cations                                                                                                                                                           

  99430                                        Carbonate, wat., unf.,         13       64.000      15.000    36.231                64.000                             43.500               34.000                29.000               15.000
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L as calcium carbonate                                                                                                                                                              

  90410                                        Acid neutralizing capacity,    17       60.000      19.000    37.765                60.000                             47.000               33.000                30.500               19.000
                                               wat., unf., fixed endpoint (pH                                                                                                                                                         
                                               4.5) titration, laboratory,                                                                                                                                                            
                                               mg/L as calcium carbonate                                                                                                                                                              

  00410                                        Acid neutralizing capacity,    13       61.000      18.000    36.923                61.000                             43.000               37.000                30.000               18.000
                                               wat., unf., fixed endpoint (pH                                                                                                                                                         
                                               4.5) titration, field, mg/L as                                                                                                                                                         
                                               calcium carbonate                                                                                                                                                                      

  99440                                        Bicarbonate, wat., unf.,       13       78.000      18.000    43.385                78.000                             51.500               40.000                35.500               18.000
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L                                                                                                                                                                                   

  99445                                        Carbonate, wat., unf.,         9        4.000       0.000     0.556                 4.000                              0.500                0.000                 0.000                0.000
                                               incremental titration, field,                                                                                                                                                          
                                               mg/L                                                                                                                                                                                   

  00940                                        Chloride, wat., filt., mg/L    17       39.000      6.500     17.012                39.000                             23.000               16.000                9.550                6.500

  00950                                        Fluoride, wat., filt., mg/L    17       0.500       0.100     0.247                 0.500                              0.350                0.200                 0.100                0.100

  00955                                        Silica, wat., filt., mg/L      17       17.000      3.200     6.641                 17.000                             7.350                6.000                 5.150                3.200

  00945                                        Sulfate, wat., filt., mg/L     17       55.000      5.700     23.924                55.000                             25.500               20.000                14.500               5.700

  70300                                        Residue on evaporation, dried  17       224.000     76.000    122.824               224.000                            150.000              119.000               86.000               76.000
                                               at 180 degrees Celsius, wat.,                                                                                                                                                          
                                               filt., mg/L                                                                                                                                                                            

  00608                                        Ammonia, wat., filt., mg/L as  17       0.360       \--       0.107\*               \*0.360                            \*0.210              \*0.050               \*0.020              \*0.004
                                               nitrogen                                                                                                                                                                               

  00623                                        Ammonia plus organic nitrogen, 17       1.200       0.300     0.676                 1.200                              0.800                0.600                 0.500                0.300
                                               wat., filt., mg/L as nitrogen                                                                                                                                                          

  00625                                        Ammonia plus organic nitrogen, 17       2.900       0.500     1.206                 2.900                              1.600                1.100                 0.750                0.500
                                               wat., unf., mg/L as nitrogen                                                                                                                                                           

  00610                                        Ammonia, wat., unf., mg/L as   3        0.220       0.020     \--                   \--                                \--                  \--                   \--                  \--
                                               nitrogen                                                                                                                                                                               

  00620                                        Nitrate, wat., unf., mg/L as   2        7.530       0.570     \--                   \--                                \--                  \--                   \--                  \--
                                               nitrogen                                                                                                                                                                               

  00631                                        Nitrite plus nitrate, wat.,    17       7.100       \--       1.275\*               \*7.100                            \*0.845              \*0.570               \*0.061              \*0.009
                                               filt., mg/L as nitrogen                                                                                                                                                                

  00630                                        Nitrite plus nitrate, wat.,    3        \--         \--       \--                   \--                                \--                  \--                   \--                  \--
                                               unf., mg/L as nitrogen                                                                                                                                                                 

  00613                                        Nitrite, wat., filt., mg/L as  17       0.100       \--       0.024\*               \*0.100                            \*0.025              \*0.020               \*0.010              \*0.003
                                               nitrogen                                                                                                                                                                               

  00615                                        Nitrite, wat., unf., mg/L as   3        0.100       0.020     \--                   \--                                \--                  \--                   \--                  \--
                                               nitrogen                                                                                                                                                                               

  00605                                        Organic nitrogen, wat., unf.,  16       1.800       0.400     0.988                 1.800                              1.375                0.920                 0.582                0.400
                                               mg/L                                                                                                                                                                                   

  00666                                        Phosphorus, wat., filt., mg/L  17       0.110       \--       0.030\*               \*0.110                            \*0.030              \*0.020               \*0.015              \*0.006

  00671                                        Orthophosphate, wat., filt.,   17       \--         \--       \--                   \--                                \--                  \--                   \--                  \--
                                               mg/L as phosphorus                                                                                                                                                                     

  70507                                        Orthophosphate, wat., unf.,    3        0.100       0.020     \--                   \--                                \--                  \--                   \--                  \--
                                               mg/L as phosphorus                                                                                                                                                                     

  00665                                        Phosphorus, wat., unf., mg/L   17       0.280       0.040     0.139                 0.280                              0.190                0.120                 0.080                0.040

  00680                                        Organic carbon, wat., unf.,    17       23.000      7.400     12.912                23.000                             15.000               12.000                10.500               7.400
                                               mg/L                                                                                                                                                                                   

  70953                                        Chlorophyll a, phytoplankton,  16       176.000     3.100     40.075                176.000                            39.500               33.450                13.825               3.100
                                               chromatographic-fluorometric                                                                                                                                                           
                                               method, ug/L                                                                                                                                                                           

  70954                                        Chlorophyll b, phytoplankton,  16       10.900      \--       3.730\*               \*10.900                           \*5.775              \*2.700               \*1.075              \*0.282
                                               chromatographic-fluorometric                                                                                                                                                           
                                               method, ug/L                                                                                                                                                                           

  01105                                        Aluminum, wat., unf.,          17       1700.000    140.000   771.176               1700.000                           1050.000             730.000               410.000              140.000
                                               recoverable, ug/L                                                                                                                                                                      

  01002                                        Arsenic, wat., unf., ug/L      17       1.000       \--       1.000\*               \*1.000                            \*1.000              \*1.000               \*1.000              \*1.000

  01027                                        Cadmium, wat., unf., ug/L      17       \--         \--       \--                   \--                                \--                  \--                   \--                  \--

  01034                                        Chromium, wat., unf.,          17       4.000       \--       1.025\*               \*4.000                            \*1.500              \*0.654               \*0.340              \*0.137
                                               recoverable, ug/L                                                                                                                                                                      

  01037                                        Cobalt, wat., unf.,            17       3.000       \--       1.616\*               \*3.000                            \*2.000              \*2.000               \*1.000              \*0.718
                                               recoverable, ug/L                                                                                                                                                                      

  01042                                        Copper, wat., unf.,            17       5.000       1.000     3.118                 5.000                              4.000                3.000                 2.000                1.000
                                               recoverable, ug/L                                                                                                                                                                      

  01045                                        Iron, wat., unf., recoverable, 17       2500.000    510.000   1505.882              2500.000                           1800.000             1500.000              1150.000             510.000
                                               ug/L                                                                                                                                                                                   

  01051                                        Lead, wat., unf., recoverable, 17       5.000       \--       3.062\*               \*5.000                            \*4.000              \*3.000               \*2.000              \*1.000
                                               ug/L                                                                                                                                                                                   
  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum    Minimum    Mean       **Percentile**                                    
  code**                                                                        size                                                                                        
  ---------------------------------------------- ------------------------------ -------- ---------- ---------- ---------- ---------------- ---------- ---------- ---------- ----------
                                                                                                                          95th             75th       50th       **25th**   **5th**

  01055                                          Manganese, wat., unf.,         17       950.000    200.000    535.882    950.000          695.000    550.000    345.000    200.000
                                                 recoverable, ug/L                                                                                                          

  71900                                          Mercury, wat., unf.,           17       \--        \--        \--        \--              \--        \--        \--        \--
                                                 recoverable, ug/L                                                                                                          

  01062                                          Molybdenum, wat., unf.,        17       4.000      \--        1.682\*    \*4.000          \*2.500    \*1.000    \*1.000    \*0.421
                                                 recoverable, ug/L                                                                                                          

  01067                                          Nickel, wat., unf.,            16       5.000      \--        2.291\*    \*5.000          \*3.000    \*2.000    \*1.250    \*0.658
                                                 recoverable, ug/L                                                                                                          

  01147                                          Selenium, wat., unf., ug/L     17       \--        \--        \--        \--              \--        \--        \--        \--

  01077                                          Silver, wat., unf.,            17       \--        \--        \--        \--              \--        \--        \--        \--
                                                 recoverable, ug/L                                                                                                          

  01092                                          Zinc, wat., unf., recoverable, 17       30.000     \--        11.223\*   \*30.000         \*15.000   \*10.000   \*5.843    \*3.292
                                                 ug/L                                                                                                                       

  **0208700780**[]{#__RefHeading___Toc50352701                                                                                                                              
  .anchor} **Little Lick Creek above SR 1814                                                                                                                                
  near Oak Grove (October 1988--April 1995)**                                                                                                                               

  00061                                          Discharge, instantaneous,      29       459.000    0.300      60.753     412.500          99.000     3.300      1.600      0.450
                                                 cubic feet per second                                                                                                      

  00080                                          Color, wat., filt., platinum   10       300.000    65.000     207.500    300.000          255.000    225.000    172.500    65.000
                                                 cobalt units                                                                                                               

  00300                                          Dissolved oxygen, wat., unf.,  25       10.900     3.900      7.128      10.480           8.850      6.700      5.850      4.140
                                                 mg/L                                                                                                                       

  00301                                          Dissolved oxygen, wat., unf.,  8        88.000     66.000     76.875     88.000           84.750     78.000     67.500     66.000
                                                 percent of saturation                                                                                                      

  00400                                          pH, wat., unf., field,         29       7.410      6.700      7.042      7.375            7.200      7.030      6.885      6.700
                                                 standard units                                                                                                             

  00403                                          pH, wat., unf., laboratory,    10       7.600      7.000      7.190      7.600            7.425      7.100      7.000      7.000
                                                 standard units                                                                                                             

  90095                                          Specific conductance, wat.,    10       262.000    94.000     150.100    262.000          181.250    130.500    111.000    94.000
                                                 unf., laboratory, microsiemens                                                                                             
                                                 per centimeter at 25 degrees                                                                                               
                                                 Celsius                                                                                                                    

  00095                                          Specific conductance, wat.,    28       506.000    70.000     242.143    498.350          348.750    247.500    121.000    74.500
                                                 unf., microsiemens per                                                                                                     
                                                 centimeter at 25 degrees                                                                                                   
                                                 Celsius                                                                                                                    

  00900                                          Hardness, wat., unf., mg/L as  10       68.000     27.000     40.900     68.000           47.750     36.000     31.500     27.000
                                                 calcium carbonate                                                                                                          

  00915                                          Calcium, wat., filt., mg/L     10       18.000     5.900      10.390     18.000           12.500     9.100      7.975      5.900

  00925                                          Magnesium, wat., filt., mg/L   10       5.500      2.400      3.610      5.500            4.125      3.400      2.800      2.400

  00935                                          Potassium, wat., filt., mg/L   10       4.400      2.400      3.190      4.400            3.950      2.800      2.600      2.400

  00931                                          Sodium adsorption ratio, wat., 10       1.000      0.500      0.770      1.000            1.000      0.700      0.600      0.500
                                                 number                                                                                                                     

  00930                                          Sodium, wat., filt., mg/L      10       25.000     6.000      12.410     25.000           15.500     9.850      8.075      6.000

  00932                                          Sodium, wat., percent in       10       44.000     30.000     36.400     44.000           41.500     35.500     31.750     30.000
                                                 equivalents of major cations                                                                                               

  99430                                          Carbonate, wat., unf.,         5        55.000     23.000     \--        \--              \--        \--        \--        \--
                                                 incremental titration, field,                                                                                              
                                                 mg/L as calcium carbonate                                                                                                  

  90410                                          Acid neutralizing capacity,    10       58.000     20.000     34.100     58.000           44.000     28.000     26.000     20.000
                                                 wat., unf., fixed endpoint (pH                                                                                             
                                                 4.5) titration, laboratory,                                                                                                
                                                 mg/L as calcium carbonate                                                                                                  

  00410                                          Acid neutralizing capacity,    5        55.000     23.000     \--        \--              \--        \--        \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                             
                                                 4.5) titration, field, mg/L as                                                                                             
                                                 calcium carbonate                                                                                                          

  99440                                          Bicarbonate, wat., unf.,       5        67.000     28.000     \--        \--              \--        \--        \--        \--
                                                 incremental titration, field,                                                                                              
                                                 mg/L                                                                                                                       

  99445                                          Carbonate, wat., unf.,         4        0.000      \--        \--        \--              \--        \--        \--        \--
                                                 incremental titration, field,                                                                                              
                                                 mg/L                                                                                                                       

  00940                                          Chloride, wat., filt., mg/L    10       20.000     5.900      10.970     20.000           13.250     9.600      7.600      5.900

  00950                                          Fluoride, wat., filt., mg/L    10       0.300      \--        0.176\*    \*0.300          \*0.225    \*0.200    \*0.100    \*0.062

  00955                                          Silica, wat., filt., mg/L      10       10.000     4.300      7.350      10.000           8.800      7.450      6.225      4.300

  00945                                          Sulfate, wat., filt., mg/L     10       19.000     8.000      12.410     19.000           15.250     11.000     9.775      8.000

  70300                                          Residue on evaporation, dried  10       180.000    85.000     108.800    180.000          119.000    94.500     87.750     85.000
                                                 at 180 degrees Celsius, wat.,                                                                                              
                                                 filt., mg/L                                                                                                                

  00608                                          Ammonia, wat., filt., mg/L as  5        0.240      0.090      \--        \--              \--        \--        \--        \--
                                                 nitrogen                                                                                                                   

  00623                                          Ammonia plus organic nitrogen, 5        1.000      0.400      \--        \--              \--        \--        \--        \--
                                                 wat., filt., mg/L as nitrogen                                                                                              

  00625                                          Ammonia plus organic nitrogen, 8        1.900      0.800      1.062      1.900            1.150      0.950      0.825      0.800
                                                 wat., unf., mg/L as nitrogen                                                                                               

  00610                                          Ammonia, wat., unf., mg/L as   3        0.150      0.100      \--        \--              \--        \--        \--        \--
                                                 nitrogen                                                                                                                   

  00620                                          Nitrate, wat., unf., mg/L as   3        0.470      0.250      \--        \--              \--        \--        \--        \--
                                                 nitrogen                                                                                                                   

  00631                                          Nitrite plus nitrate, wat.,    5        4.500      0.280      \--        \--              \--        \--        \--        \--
                                                 filt., mg/L as nitrogen                                                                                                    

  00630                                          Nitrite plus nitrate, wat.,    3        0.550      0.270      \--        \--              \--        \--        \--        \--
                                                 unf., mg/L as nitrogen                                                                                                     

  00613                                          Nitrite, wat., filt., mg/L as  5        \--        \--        \--        \--              \--        \--        \--        \--
                                                 nitrogen                                                                                                                   

  00615                                          Nitrite, wat., unf., mg/L as   3        0.080      0.000      \--        \--              \--        \--        \--        \--
                                                 nitrogen                                                                                                                   

  00605                                          Organic nitrogen, wat., unf.,  7        1.800      0.660      0.944      1.800            1.000      0.810      0.730      0.660
                                                 mg/L                                                                                                                       

  00666                                          Phosphorus, wat., filt., mg/L  5        0.100      0.020      \--        \--              \--        \--        \--        \--

  00671                                          Orthophosphate, wat., filt.,   5        0.100      0.010      \--        \--              \--        \--        \--        \--
                                                 mg/L as phosphorus                                                                                                         

  70507                                          Orthophosphate, wat., unf.,    3        0.170      0.000      \--        \--              \--        \--        \--        \--
                                                 mg/L as phosphorus                                                                                                         

  00665                                          Phosphorus, wat., unf., mg/L   8        0.600      0.080      0.214      0.600            0.195      0.180      0.132      0.080

  00680                                          Organic carbon, wat., unf.,    10       28.000     11.000     16.600     28.000           18.000     16.000     13.750     11.000
                                                 mg/L                                                                                                                       

  01105                                          Aluminum, wat., unf.,          9        5800.000   1200.000   2844.444   5800.000         3750.000   2900.000   1450.000   1200.000
                                                 recoverable, ug/L                                                                                                          

  01002                                          Arsenic, wat., unf., ug/L      8        2.000      \--        1.088\*    \*2.000          \*1.000    \*1.000    \*1.000    \*0.706

  01027                                          Cadmium, wat., unf., ug/L      9        \--        \--        \--        \--              \--        \--        \--        \--

  01034                                          Chromium, wat., unf.,          9        9.000      \--        4.471\*    \*9.000          \*6.000    \*5.000    \*1.923    \*1.393
                                                 recoverable, ug/L                                                                                                          

  01037                                          Cobalt, wat., unf.,            9        4.000      1.000      2.444      4.000            3.500      2.000      2.000      1.000
                                                 recoverable, ug/L                                                                                                          

  01042                                          Copper, wat., unf.,            9        8.000      4.000      5.667      8.000            7.000      6.000      4.000      4.000
                                                 recoverable, ug/L                                                                                                          

  01045                                          Iron, wat., unf., recoverable, 9        4200.000   2100.000   3011.111   4200.000         3650.000   2900.000   2400.000   2100.000
                                                 ug/L                                                                                                                       

  01051                                          Lead, wat., unf., recoverable, 9        14.000     3.000      7.222      14.000           9.500      6.000      4.500      3.000
                                                 ug/L                                                                                                                       

  01055                                          Manganese, wat., unf.,         9        730.000    160.000    382.222    730.000          565.000    320.000    205.000    160.000
                                                 recoverable, ug/L                                                                                                          

  71900                                          Mercury, wat., unf.,           9        \--        \--        \--        \--              \--        \--        \--        \--
                                                 recoverable, ug/L                                                                                                          

  01062                                          Molybdenum, wat., unf.,        9        \--        \--        \--        \--              \--        \--        \--        \--
                                                 recoverable, ug/L                                                                                                          

  01067                                          Nickel, wat., unf.,            9        6.000      3.000      4.444      6.000            5.000      5.000      3.500      3.000
                                                 recoverable, ug/L                                                                                                          

  01147                                          Selenium, wat., unf., ug/L     9        \--        \--        \--        \--              \--        \--        \--        \--

  01077                                          Silver, wat., unf.,            9        \--        \--        \--        \--              \--        \--        \--        \--
                                                 recoverable, ug/L                                                                                                          

  01092                                          Zinc, wat., unf., recoverable, 9        40.000     \--        24.837\*   \*40.000         \*30.000   \*20.000   \*20.000   \*13.534
                                                 ug/L                                                                                                                       

  80154                                          Suspended sediment             9        413.000    91.000     177.111    413.000          259.500    121.000    100.000    91.000
                                                 concentration, mg/L                                                                                                        

  **0208703650**[]{#__RefHeading___Toc50352702                                                                                                                              
  .anchor} **Falls Lake at N.C. 50 near Sandy                                                                                                                               
  Plain (October 1988--July 1995)**                                                                                                                                         

  00080                                          Color, wat., filt., platinum   18       92.000     14.000     33.333     92.000           31.250     26.000     23.000     14.000
                                                 cobalt units                                                                                                               

  00078                                          Transparency, wat., unf.,      13       0.850      0.350      0.592      0.850            0.700      0.650      0.425      0.350
                                                 Secchi disc, meters                                                                                                        

  00300                                          Dissolved oxygen, wat., unf.,  26       11.800     3.800      8.550      11.730           9.725      8.600      7.675      4.605
                                                 mg/L                                                                                                                       

  00301                                          Dissolved oxygen, wat., unf.,  18       123.000    48.000     96.556     123.000          107.000    99.000     87.000     48.000
                                                 percent of saturation                                                                                                      

  00400                                          pH, wat., unf., field,         27       8.430      6.400      7.344      8.338            7.800      7.200      6.900      6.456
                                                 standard units                                                                                                             

  00403                                          pH, wat., unf., laboratory,    18       8.500      6.800      7.450      8.500            7.625      7.350      7.100      6.800
                                                 standard units                                                                                                             

  90095                                          Specific conductance, wat.,    18       159.000    64.000     112.556    159.000          134.000    111.000    94.250     64.000
                                                 unf., laboratory, microsiemens                                                                                             
                                                 per centimeter at 25 degrees                                                                                               
                                                 Celsius                                                                                                                    

  00095                                          Specific conductance, wat.,    27       155.000    59.000     102.074    150.600          130.000    102.000    76.000     59.400
                                                 unf., microsiemens per                                                                                                     
                                                 centimeter at 25 degrees                                                                                                   
                                                 Celsius                                                                                                                    

  00900                                          Hardness, wat., unf., mg/L as  18       31.000     18.000     26.722     31.000           29.000     28.500     25.250     18.000
                                                 calcium carbonate                                                                                                          

  00915                                          Calcium, wat., filt., mg/L     18       7.200      4.300      6.478      7.200            7.000      6.900      6.150      4.300

  00925                                          Magnesium, wat., filt., mg/L   18       3.100      1.800      2.561      3.100            2.800      2.700      2.350      1.800

  00935                                          Potassium, wat., filt., mg/L   18       2.800      1.500      2.256      2.800            2.500      2.300      2.025      1.500

  00931                                          Sodium adsorption ratio, wat., 18       2.000      0.400      0.828      2.000            1.000      0.750      0.575      0.400
                                                 number                                                                                                                     

  00930                                          Sodium, wat., filt., mg/L      18       19.000     4.100      10.478     19.000           13.500     9.200      6.725      4.100

  00932                                          Sodium, wat., percent in       18       56.000     31.000     41.722     56.000           49.500     38.000     34.750     31.000
                                                 equivalents of major cations                                                                                               

  99430                                          Carbonate, wat., unf.,         13       57.000     14.000     31.769     57.000           43.000     29.000     19.500     14.000
                                                 incremental titration, field,                                                                                              
                                                 mg/L as calcium carbonate                                                                                                  

  90410                                          Acid neutralizing capacity,    18       37.000     17.000     28.889     37.000           32.250     31.000     24.000     17.000
                                                 wat., unf., fixed endpoint (pH                                                                                             
                                                 4.5) titration, laboratory,                                                                                                
                                                 mg/L as calcium carbonate                                                                                                  

  00410                                          Acid neutralizing capacity,    13       56.000     14.000     32.462     56.000           44.000     30.000     20.500     14.000
                                                 wat., unf., fixed endpoint (pH                                                                                             
                                                 4.5) titration, field, mg/L as                                                                                             
                                                 calcium carbonate                                                                                                          

  99440                                          Bicarbonate, wat., unf.,       13       70.000     17.000     38.615     70.000           52.500     35.000     23.500     17.000
                                                 incremental titration, field,                                                                                              
                                                 mg/L                                                                                                                       

  99445                                          Carbonate, wat., unf.,         10       0.000      \--        \--        \--              \--        \--        \--        \--
                                                 incremental titration, field,                                                                                              
                                                 mg/L                                                                                                                       

  00940                                          Chloride, wat., filt., mg/L    18       13.000     4.100      8.006      13.000           10.250     7.000      5.900      4.100

  00950                                          Fluoride, wat., filt., mg/L    18       0.200      \--        0.147\*    \*0.200          \*0.200    \*0.151    \*0.099    \*0.071

  00955                                          Silica, wat., filt., mg/L      18       7.100      2.600      4.811      7.100            5.525      5.100      3.900      2.600

  00945                                          Sulfate, wat., filt., mg/L     18       20.000     6.400      11.083     20.000           12.250     9.950      9.200      6.400

  70300                                          Residue on evaporation, dried  18       126.000    54.000     74.444     126.000          82.000     71.000     63.500     54.000
                                                 at 180 degrees Celsius, wat.,                                                                                              
                                                 filt., mg/L                                                                                                                

  00608                                          Ammonia, wat., filt., mg/L as  18       0.180      \--        0.044\*    \*0.180          \*0.082    \*0.020    \*0.017    \*0.004
                                                 nitrogen                                                                                                                   

  00623                                          Ammonia plus organic nitrogen, 18       0.600      0.300      0.411      0.600            0.500      0.400      0.300      0.300
                                                 wat., filt., mg/L as nitrogen                                                                                              

  00625                                          Ammonia plus organic nitrogen, 18       0.900      0.400      0.617      0.900            0.700      0.600      0.500      0.400
                                                 wat., unf., mg/L as nitrogen                                                                                               

  00610                                          Ammonia, wat., unf., mg/L as   4        0.120      0.010      \--        \--              \--        \--        \--        \--
                                                 nitrogen                                                                                                                   

  00620                                          Nitrate, wat., unf., mg/L as   1        0.050      \--        \--        \--              \--        \--        \--        \--
                                                 nitrogen                                                                                                                   

  00631                                          Nitrite plus nitrate, wat.,    18       0.220      \--        0.042\*    \*0.220          \*0.057    \*0.018    \*0.007    \*0.002
                                                 filt., mg/L as nitrogen                                                                                                    

  00630                                          Nitrite plus nitrate, wat.,    4        \--        \--        \--        \--              \--        \--        \--        \--
                                                 unf., mg/L as nitrogen                                                                                                     

  00613                                          Nitrite, wat., filt., mg/L as  18       \--        \--        \--        \--              \--        \--        \--        \--
                                                 nitrogen                                                                                                                   

  00615                                          Nitrite, wat., unf., mg/L as   4        \--        \--        \--        \--              \--        \--        \--        \--
                                                 nitrogen                                                                                                                   

  00605                                          Organic nitrogen, wat., unf.,  14       0.890      0.380      0.559      0.890            0.635      0.515      0.480      0.380
                                                 mg/L                                                                                                                       

  00666                                          Phosphorus, wat., filt., mg/L  18       0.030      \--        0.008\*    \*0.030          \*0.010    \*0.004    \*0.002    \*0.000

  00671                                          Orthophosphate, wat., filt.,   18       \--        \--        \--        \--              \--        \--        \--        \--
                                                 mg/L as phosphorus                                                                                                         

  70507                                          Orthophosphate, wat., unf.,    4        \--        \--        \--        \--              \--        \--        \--        \--
                                                 mg/L as phosphorus                                                                                                         

  00665                                          Phosphorus, wat., unf., mg/L   18       0.100      \--        0.031\*    \*0.100          \*0.040    \*0.030    \*0.020    \*0.009

  00680                                          Organic carbon, wat., unf.,    18       12.000     4.300      8.922      12.000           9.550      8.750      8.450      4.300
                                                 mg/L                                                                                                                       

  70953                                          Chlorophyll a, phytoplankton,  18       37.300     1.200      14.700     37.300           21.350     11.550     8.375      1.200
                                                 chromatographic-fluorometric                                                                                               
                                                 method, ug/L                                                                                                               

  70954                                          Chlorophyll b, phytoplankton,  18       2.200      \--        0.914\*    \*2.200          \*1.200    \*0.800    \*0.398    \*0.192
                                                 chromatographic-fluorometric                                                                                               
                                                 method, ug/L                                                                                                               

  01105                                          Aluminum, wat., unf.,          18       470.000    40.000     140.556    470.000          187.500    100.000    60.000     40.000
                                                 recoverable, ug/L                                                                                                          

  01002                                          Arsenic, wat., unf., ug/L      18       \--        \--        \--        \--              \--        \--        \--        \--

  01027                                          Cadmium, wat., unf., ug/L      18       \--        \--        \--        \--              \--        \--        \--        \--

  01034                                          Chromium, wat., unf.,          18       \--        \--        \--        \--              \--        \--        \--        \--
                                                 recoverable, ug/L                                                                                                          

  01037                                          Cobalt, wat., unf.,            18       \--        \--        \--        \--              \--        \--        \--        \--
                                                 recoverable, ug/L                                                                                                          

  01042                                          Copper, wat., unf.,            18       8.000      \--        1.485\*    \*8.000          \*2.000    \*1.000    \*0.345    \*0.111
                                                 recoverable, ug/L                                                                                                          

  01045                                          Iron, wat., unf., recoverable, 18       1300.000   60.000     385.000    1300.000         487.500    320.000    177.500    60.000
                                                 ug/L                                                                                                                       

  01051                                          Lead, wat., unf., recoverable, 18       \--        \--        \--        \--              \--        \--        \--        \--
                                                 ug/L                                                                                                                       
  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum   Minimum   Mean      **Percentile**                                         
  code**                                                                        size                                                                                          
  ---------------------------------------------- ------------------------------ -------- --------- --------- --------- ---------------- --------- ------ --------- ---------- ---------
                                                                                                                       95th                       75th   50th      **25th**   **5th**

  01055                                          Manganese, wat., unf.,         18       640.000   50.000    203.333   640.000          255.000          180.000   97.500     50.000
                                                 recoverable, ug/L                                                                                                            

  71900                                          Mercury, wat., unf.,           18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01062                                          Molybdenum, wat., unf.,        18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01067                                          Nickel, wat., unf.,            18       5.000     \--       1.238\*   \*5.000          \*2.000          \*0.890   \*0.452    \*0.191
                                                 recoverable, ug/L                                                                                                            

  01147                                          Selenium, wat., unf., ug/L     18       \--       \--       \--       \--              \--              \--       \--        \--

  01077                                          Silver, wat., unf.,            18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01092                                          Zinc, wat., unf., recoverable, 18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 ug/L                                                                                                                         

  **0208708905**[]{#__RefHeading___Toc50352703                                                                                                                                
  .anchor} **Falls Lake at N.C. 98 near Bayleaf                                                                                                                               
  (October 1988--July 1995)**                                                                                                                                                 

  00080                                          Color, wat., filt., platinum   18       88.000    13.000    28.833    88.000           32.500           22.500    14.750     13.000
                                                 cobalt units                                                                                                                 

  00078                                          Transparency, wat., unf.,      13       1.200     0.650     0.804     1.200            0.875            0.750     0.700      0.650
                                                 Secchi disc, meters                                                                                                          

  00300                                          Dissolved oxygen, wat., unf.,  26       12.600    3.500     7.927     12.075           9.300            8.000     6.925      3.640
                                                 mg/L                                                                                                                         

  00301                                          Dissolved oxygen, wat., unf.,  18       122.000   39.000    88.500    122.000          106.250          94.000    79.500     39.000
                                                 percent of saturation                                                                                                        

  00400                                          pH, wat., unf., field,         27       7.800     6.300     7.131     7.796            7.500            7.100     6.800      6.380
                                                 standard units                                                                                                               

  00403                                          pH, wat., unf., laboratory,    18       8.500     6.700     7.333     8.500            7.800            7.200     7.000      6.700
                                                 standard units                                                                                                               

  90095                                          Specific conductance, wat.,    18       129.000   61.000    98.333    129.000          115.000          94.500    85.500     61.000
                                                 unf., laboratory, microsiemens                                                                                               
                                                 per centimeter at 25 degrees                                                                                                 
                                                 Celsius                                                                                                                      

  00095                                          Specific conductance, wat.,    27       127.000   59.000    92.593    126.600          111.000          88.000    77.000     61.800
                                                 unf., microsiemens per                                                                                                       
                                                 centimeter at 25 degrees                                                                                                     
                                                 Celsius                                                                                                                      

  00900                                          Hardness, wat., unf., mg/L as  18       31.000    17.000    25.167    31.000           29.000           25.500    22.000     17.000
                                                 calcium carbonate                                                                                                            

  00915                                          Calcium, wat., filt., mg/L     18       7.400     4.100     5.989     7.400            7.000            5.950     5.300      4.100

  00925                                          Magnesium, wat., filt., mg/L   18       3.000     1.700     2.489     3.000            2.825            2.600     2.175      1.700

  00935                                          Potassium, wat., filt., mg/L   18       2.700     1.500     2.128     2.700            2.500            2.200     1.775      1.500

  00931                                          Sodium adsorption ratio, wat., 18       1.000     0.400     0.672     1.000            0.800            0.650     0.575      0.400
                                                 number                                                                                                                       

  00930                                          Sodium, wat., filt., mg/L      18       13.000    3.900     7.911     13.000           9.925            7.300     6.100      3.900

  00932                                          Sodium, wat., percent in       18       47.000    31.000    37.278    47.000           39.250           36.500    34.000     31.000
                                                 equivalents of major cations                                                                                                 

  99430                                          Carbonate, wat., unf.,         13       41.000    13.000    25.154    41.000           34.500           21.000    18.000     13.000
                                                 incremental titration, field,                                                                                                
                                                 mg/L as calcium carbonate                                                                                                    

  90410                                          Acid neutralizing capacity,    18       42.000    15.000    27.278    42.000           34.000           26.500    20.750     15.000
                                                 wat., unf., fixed endpoint (pH                                                                                               
                                                 4.5) titration, laboratory,                                                                                                  
                                                 mg/L as calcium carbonate                                                                                                    

  00410                                          Acid neutralizing capacity,    13       43.000    14.000    26.077    43.000           35.000           23.000    18.000     14.000
                                                 wat., unf., fixed endpoint (pH                                                                                               
                                                 4.5) titration, field, mg/L as                                                                                               
                                                 calcium carbonate                                                                                                            

  99440                                          Bicarbonate, wat., unf.,       13       50.000    16.000    30.538    50.000           42.000           26.000    21.500     16.000
                                                 incremental titration, field,                                                                                                
                                                 mg/L                                                                                                                         

  99445                                          Carbonate, wat., unf.,         9        0.000     \--       \--       \--              \--              \--       \--        \--
                                                 incremental titration, field,                                                                                                
                                                 mg/L                                                                                                                         

  00940                                          Chloride, wat., filt., mg/L    18       9.000     3.800     6.406     9.000            7.850            6.300     5.325      3.800

  00950                                          Fluoride, wat., filt., mg/L    18       0.200     \--       0.120\*   \*0.200          \*0.200          \*0.100   \*0.093    \*0.052

  00955                                          Silica, wat., filt., mg/L      18       6.700     \--       4.950\*   \*6.700          \*5.850          \*5.300   \*4.000    \*2.694

  00945                                          Sulfate, wat., filt., mg/L     18       13.000    6.500     8.411     13.000           9.600            8.150     6.925      6.500

  70300                                          Residue on evaporation, dried  18       95.000    36.000    63.500    95.000           69.000           66.000    56.000     36.000
                                                 at 180 degrees Celsius, wat.,                                                                                                
                                                 filt., mg/L                                                                                                                  

  00608                                          Ammonia, wat., filt., mg/L as  17       0.510     \--       0.104\*   \*0.510          \*0.125          \*0.040   \*0.020    \*0.003
                                                 nitrogen                                                                                                                     

  00623                                          Ammonia plus organic nitrogen, 18       1.000     0.200     0.494     1.000            0.725            0.400     0.300      0.200
                                                 wat., filt., mg/L as nitrogen                                                                                                

  00625                                          Ammonia plus organic nitrogen, 18       1.500     0.400     0.617     1.500            0.725            0.500     0.400      0.400
                                                 wat., unf., mg/L as nitrogen                                                                                                 

  00610                                          Ammonia, wat., unf., mg/L as   4        \--       \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                     

  00620                                          Nitrate, wat., unf., mg/L as   2        0.070     0.040     \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                     

  00631                                          Nitrite plus nitrate, wat.,    18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 filt., mg/L as nitrogen                                                                                                      

  00630                                          Nitrite plus nitrate, wat.,    4        \--       \--       \--       \--              \--              \--       \--        \--
                                                 unf., mg/L as nitrogen                                                                                                       

  00613                                          Nitrite, wat., filt., mg/L as  18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                     

  00615                                          Nitrite, wat., unf., mg/L as   4        \--       \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                     

  00605                                          Organic nitrogen, wat., unf.,  15       1.400     0.350     0.519     1.400            0.570            0.450     0.380      0.350
                                                 mg/L                                                                                                                         

  00666                                          Phosphorus, wat., filt., mg/L  18       0.110     \--       0.014\*   \*0.110          \*0.020          \*0.004   \*0.001    \*0.000

  00671                                          Orthophosphate, wat., filt.,   18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 mg/L as phosphorus                                                                                                           

  70507                                          Orthophosphate, wat., unf.,    4        \--       \--       \--       \--              \--              \--       \--        \--
                                                 mg/L as phosphorus                                                                                                           

  00665                                          Phosphorus, wat., unf., mg/L   18       0.070     \--       0.026\*   \*0.070          \*0.030          \*0.020   \*0.010    \*0.005

  00680                                          Organic carbon, wat., unf.,    18       14.000    6.500     8.200     14.000           9.050            7.500     6.850      6.500
                                                 mg/L                                                                                                                         

  70953                                          Chlorophyll a, phytoplankton,  18       24.100    0.800     8.561     24.100           12.650           6.800     4.000      0.800
                                                 chromatographic-fluorometric                                                                                                 
                                                 method, ug/L                                                                                                                 

  70954                                          Chlorophyll b, phytoplankton,  18       1.500     \--       0.600\*   \*1.500          \*0.925          \*0.381   \*0.274    \*0.126
                                                 chromatographic-fluorometric                                                                                                 
                                                 method, ug/L                                                                                                                 

  01105                                          Aluminum, wat., unf.,          18       310.000   40.000    100.556   310.000          142.500          60.000    50.000     40.000
                                                 recoverable, ug/L                                                                                                            

  01002                                          Arsenic, wat., unf., ug/L      18       \--       \--       \--       \--              \--              \--       \--        \--

  01027                                          Cadmium, wat., unf., ug/L      18       \--       \--       \--       \--              \--              \--       \--        \--

  01034                                          Chromium, wat., unf.,          18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01037                                          Cobalt, wat., unf.,            18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01042                                          Copper, wat., unf.,            18       3.000     \--       1.310\*   \*3.000          \*2.000          \*1.000   \*0.723    \*0.411
                                                 recoverable, ug/L                                                                                                            

  01045                                          Iron, wat., unf., recoverable, 18       790.000   60.000    274.444   790.000          387.500          220.000   117.500    60.000
                                                 ug/L                                                                                                                         

  01051                                          Lead, wat., unf., recoverable, 18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 ug/L                                                                                                                         
  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum   Minimum   Mean      **Percentile**                                         
  code**                                                                        size                                                                                          
  ---------------------------------------------- ------------------------------ -------- --------- --------- --------- ---------------- --------- ------ --------- ---------- ---------
                                                                                                                       95th                       75th   50th      **25th**   **5th**

  01055                                          Manganese, wat., unf.,         18       770.000   20.000    198.889   770.000          337.500          95.000    40.000     20.000
                                                 recoverable, ug/L                                                                                                            

  71900                                          Mercury, wat., unf.,           18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01062                                          Molybdenum, wat., unf.,        18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01067                                          Nickel, wat., unf.,            18       7.000     \--       1.199\*   \*7.000          \*1.000          \*1.000   \*0.415    \*0.182
                                                 recoverable, ug/L                                                                                                            

  01147                                          Selenium, wat., unf., ug/L     18       \--       \--       \--       \--              \--              \--       \--        \--

  01077                                          Silver, wat., unf.,            18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01092                                          Zinc, wat., unf., recoverable, 18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 ug/L                                                                                                                         

  **0208718195**[]{#__RefHeading___Toc50352704                                                                                                                                
  .anchor} **Falls Lake above dam at Falls                                                                                                                                    
  (October 1988--July 1995)**                                                                                                                                                 

  00080                                          Color, wat., filt., platinum   18       95.000    13.000    27.500    95.000           25.250           22.000    18.000     13.000
                                                 cobalt units                                                                                                                 

  00078                                          Transparency, wat., unf.,      13       1.350     0.600     0.877     1.350            0.975            0.850     0.750      0.600
                                                 Secchi disc, meters                                                                                                          

  00300                                          Dissolved oxygen, wat., unf.,  26       12.500    3.800     7.554     11.940           8.800            7.650     6.600      3.835
                                                 mg/L                                                                                                                         

  00301                                          Dissolved oxygen, wat., unf.,  18       123.000   40.000    83.333    123.000          102.250          92.000    66.250     40.000
                                                 percent of saturation                                                                                                        

  00400                                          pH, wat., unf., field,         27       8.000     6.300     7.129     7.960            7.540            7.000     6.800      6.380
                                                 standard units                                                                                                               

  00403                                          pH, wat., unf., laboratory,    18       8.400     6.600     7.261     8.400            7.500            7.200     6.875      6.600
                                                 standard units                                                                                                               

  90095                                          Specific conductance, wat.,    18       117.000   64.000    92.778    117.000          106.250          93.000    77.750     64.000
                                                 unf., laboratory, microsiemens                                                                                               
                                                 per centimeter at 25 degrees                                                                                                 
                                                 Celsius                                                                                                                      

  00095                                          Specific conductance, wat.,    27       118.000   60.000    87.333    116.000          103.000          87.000    73.000     62.000
                                                 unf., microsiemens per                                                                                                       
                                                 centimeter at 25 degrees                                                                                                     
                                                 Celsius                                                                                                                      

  00900                                          Hardness, wat., unf., mg/L as  18       32.000    18.000    24.722    32.000           28.250           25.500    20.750     18.000
                                                 calcium carbonate                                                                                                            

  00915                                          Calcium, wat., filt., mg/L     18       7.900     4.300     5.833     7.900            6.825            5.650     4.800      4.300

  00925                                          Magnesium, wat., filt., mg/L   18       3.000     1.800     2.450     3.000            2.800            2.500     2.150      1.800

  00935                                          Potassium, wat., filt., mg/L   18       2.700     1.500     2.078     2.700            2.325            2.100     1.775      1.500

  00931                                          Sodium adsorption ratio, wat., 18       0.800     0.400     0.622     0.800            0.700            0.600     0.500      0.400
                                                 number                                                                                                                       

  00930                                          Sodium, wat., filt., mg/L      18       10.000    4.200     7.022     10.000           8.125            6.700     5.400      4.200

  00932                                          Sodium, wat., percent in       18       41.000    30.000    35.500    41.000           37.250           36.000    33.750     30.000
                                                 equivalents of major cations                                                                                                 

  99430                                          Carbonate, wat., unf.,         13       80.000    10.000    31.231    80.000           43.000           23.000    19.500     10.000
                                                 incremental titration, field,                                                                                                
                                                 mg/L as calcium carbonate                                                                                                    

  90410                                          Acid neutralizing capacity,    18       37.000    15.000    25.778    37.000           32.250           24.000    19.750     15.000
                                                 wat., unf., fixed endpoint (pH                                                                                               
                                                 4.5) titration, laboratory,                                                                                                  
                                                 mg/L as calcium carbonate                                                                                                    

  00410                                          Acid neutralizing capacity,    13       81.000    12.000    32.000    81.000           43.500           23.000    20.000     12.000
                                                 wat., unf., fixed endpoint (pH                                                                                               
                                                 4.5) titration, field, mg/L as                                                                                               
                                                 calcium carbonate                                                                                                            

  99440                                          Bicarbonate, wat., unf.,       13       98.000    12.000    38.000    98.000           52.500           28.000    23.000     12.000
                                                 incremental titration, field,                                                                                                
                                                 mg/L                                                                                                                         

  99445                                          Carbonate, wat., unf.,         10       0.000     \--       \--       \--              \--              \--       \--        \--
                                                 incremental titration, field,                                                                                                
                                                 mg/L                                                                                                                         

  00940                                          Chloride, wat., filt., mg/L    18       7.000     4.000     5.939     7.000            6.700            6.350     5.275      4.000

  00950                                          Fluoride, wat., filt., mg/L    18       0.200     \--       0.109\*   \*0.200          \*0.100          \*0.100   \*0.094    \*0.057

  00955                                          Silica, wat., filt., mg/L      18       7.700     \--       5.062\*   \*7.700          \*6.025          \*5.150   \*4.025    \*2.809

  00945                                          Sulfate, wat., filt., mg/L     18       11.000    5.300     7.761     11.000           9.025            7.700     6.525      5.300

  70300                                          Residue on evaporation, dried  18       72.000    45.000    58.611    72.000           63.250           59.000    53.500     45.000
                                                 at 180 degrees Celsius, wat.,                                                                                                
                                                 filt., mg/L                                                                                                                  

  00608                                          Ammonia, wat., filt., mg/L as  18       0.530     \--       0.128\*   \*0.530          \*0.252          \*0.040   \*0.020    \*0.003
                                                 nitrogen                                                                                                                     

  00623                                          Ammonia plus organic nitrogen, 18       0.800     0.300     0.472     0.800            0.625            0.400     0.300      0.300
                                                 wat., filt., mg/L as nitrogen                                                                                                

  00625                                          Ammonia plus organic nitrogen, 18       1.000     0.300     0.550     1.000            0.600            0.550     0.400      0.300
                                                 wat., unf., mg/L as nitrogen                                                                                                 

  00610                                          Ammonia, wat., unf., mg/L as   4        \--       \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                     

  00620                                          Nitrate, wat., unf., mg/L as   1        0.040     \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                     

  00631                                          Nitrite plus nitrate, wat.,    18       0.200     \--       0.063\*   \*0.200          \*0.094          \*0.042   \*0.022    \*0.009
                                                 filt., mg/L as nitrogen                                                                                                      

  00630                                          Nitrite plus nitrate, wat.,    4        \--       \--       \--       \--              \--              \--       \--        \--
                                                 unf., mg/L as nitrogen                                                                                                       

  00613                                          Nitrite, wat., filt., mg/L as  18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                     

  00615                                          Nitrite, wat., unf., mg/L as   4        \--       \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                     

  00605                                          Organic nitrogen, wat., unf.,  17       0.580     0.230     0.430     0.580            0.500            0.450     0.375      0.230
                                                 mg/L                                                                                                                         

  00666                                          Phosphorus, wat., filt., mg/L  18       0.050     \--       0.012\*   \*0.050          \*0.015          \*0.006   \*0.002    \*0.001

  00671                                          Orthophosphate, wat., filt.,   18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 mg/L as phosphorus                                                                                                           

  70507                                          Orthophosphate, wat., unf.,    4        \--       \--       \--       \--              \--              \--       \--        \--
                                                 mg/L as phosphorus                                                                                                           

  00665                                          Phosphorus, wat., unf., mg/L   18       0.040     \--       0.020\*   \*0.040          \*0.040          \*0.010   \*0.007    \*0.003

  00680                                          Organic carbon, wat., unf.,    17       9.300     5.900     7.429     9.300            8.150            7.300     6.700      5.900
                                                 mg/L                                                                                                                         

  70953                                          Chlorophyll a, phytoplankton,  18       65.800    1.900     11.133    65.800           13.200           7.400     3.775      1.900
                                                 chromatographic-fluorometric                                                                                                 
                                                 method, ug/L                                                                                                                 

  70954                                          Chlorophyll b, phytoplankton,  18       4.200     \--       0.758\*   \*4.200          \*0.925          \*0.450   \*0.246    \*0.088
                                                 chromatographic-fluorometric                                                                                                 
                                                 method, ug/L                                                                                                                 

  01105                                          Aluminum, wat., unf.,          18       250.000   30.000    85.000    250.000          95.000           60.000    40.000     30.000
                                                 recoverable, ug/L                                                                                                            

  01002                                          Arsenic, wat., unf., ug/L      18       \--       \--       \--       \--              \--              \--       \--        \--

  01027                                          Cadmium, wat., unf., ug/L      18       \--       \--       \--       \--              \--              \--       \--        \--

  01034                                          Chromium, wat., unf.,          18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01037                                          Cobalt, wat., unf.,            18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                            

  01042                                          Copper, wat., unf.,            18       3.000     \--       1.338\*   \*3.000          \*2.000          \*1.000   \*0.658    \*0.342
                                                 recoverable, ug/L                                                                                                            

  01045                                          Iron, wat., unf., recoverable, 18       870.000   40.000    243.889   870.000          350.000          125.000   80.000     40.000
                                                 ug/L                                                                                                                         

  01051                                          Lead, wat., unf., recoverable, 18       \--       \--       \--       \--              \--              \--       \--        \--
                                                 ug/L                                                                                                                         
  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                           **Constituent     Sample   Maximum    Minimum   Mean        **Percentile**                                                                  
  code**                                       name**            size                                                                                                                      
  -------------------------------------------- ----------------- -------- ---------- --------- ----------- ---------------- ---------- ----------- ------ ---------- ---------- ---------- ---------
                                                                                                           95th                                    75th              50th       **25th**   **5th**

  01055                                        Manganese, wat.,  18       1000.000   \--       304.723\*   \*1000.000                  \*680.000                     \*80.000   \*40.000   \*5.010
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  71900                                        Mercury, wat.,    18       \--        \--       \--         \--                         \--                           \--        \--        \--
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01062                                        Molybdenum, wat., 18       \--        \--       \--         \--                         \--                           \--        \--        \--
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01067                                        Nickel, wat.,     18       5.000      \--       0.986\*     \*5.000                     \*1.000                       \*0.501    \*0.219    \*0.068
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01147                                        Selenium, wat.,   18       \--        \--       \--         \--                         \--                           \--        \--        \--
                                               unf., ug/L                                                                                                                                  

  01077                                        Silver, wat.,     18       \--        \--       \--         \--                         \--                           \--        \--        \--
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01092                                        Zinc, wat., unf., 18       \--        \--       \--         \--                         \--                           \--        \--        \--
                                               recoverable, ug/L                                                                                                                           

  **02087183**[]{#__RefHeading___Toc50352705                                                                                                                                               
  .anchor} **Neuse River near Falls (October                                                                                                                                               
  1988--September 1996)**                                                                                                                                                                  

  00061                                        Discharge,        16       3670.000   108.000   738.000     3670.000                    444.250                       184.500    167.750    108.000
                                               instantaneous,                                                                                                                              
                                               cubic feet per                                                                                                                              
                                               second                                                                                                                                      

  00300                                        Dissolved oxygen, 16       12.200     7.200     8.794       12.200                      9.650                         8.700      7.650      7.200
                                               wat., unf., mg/L                                                                                                                            

  00400                                        pH, wat., unf.,   16       7.800      6.300     6.940       7.800                       7.175                         7.030      6.600      6.300
                                               field, standard                                                                                                                             
                                               units                                                                                                                                       

  00095                                        Specific          15       104.000    50.000    81.100      104.000                     95.000                        82.500     74.000     50.000
                                               conductance,                                                                                                                                
                                               wat., unf.,                                                                                                                                 
                                               microsiemens per                                                                                                                            
                                               centimeter at 25                                                                                                                            
                                               degrees Celsius                                                                                                                             

  00431                                        Acid neutralizing 1        22.000     \--       \--         \--                         \--                           \--        \--        \--
                                               capacity, wat.,                                                                                                                             
                                               unf., mg/L as                                                                                                                               
                                               calcium carbonate                                                                                                                           

  **02087570**[]{#__RefHeading___Toc50352706                                                                                                                                               
  .anchor} **Neuse River at Smithfield                                                                                                                                                     
  (October 1988--June 1995)**                                                                                                                                                              

  00061                                        Discharge,        84       6170       203       1387.143                     5500                          1672.5     483        329.25     267.5
                                               instantaneous,                                                                                                                              
                                               cubic feet per                                                                                                                              
                                               second                                                                                                                                      

  00080                                        Color, wat.,      84       280        7         51.333                       120                           55         43         25.25      16.5
                                               filt., platinum                                                                                                                             
                                               cobalt units                                                                                                                                

  00300                                        Dissolved oxygen, 81       12.6       5.4       8.717                        12.38                         10.45      8.4        6.9        6.2
                                               wat., unf., mg/L                                                                                                                            

  00301                                        Dissolved oxygen, 81       144        64        87.642                       102.9                         91.5       87         82         74.1
                                               wat., unf.,                                                                                                                                 
                                               percent of                                                                                                                                  
                                               saturation                                                                                                                                  

  00400                                        pH, wat., unf.,   84       7.6        5.8       7.057                        7.5                           7.3        7.1        6.9        6.425
                                               field, standard                                                                                                                             
                                               units                                                                                                                                       

  00403                                        pH, wat., unf.,   84       8.1        6.9       7.448                        7.9                           7.6        7.4        7.3        7
                                               laboratory,                                                                                                                                 
                                               standard units                                                                                                                              

  90095                                        Specific          84       340        70        176.845                      273.25                        223.75     178        119.25     84
                                               conductance,                                                                                                                                
                                               wat., unf.,                                                                                                                                 
                                               laboratory,                                                                                                                                 
                                               microsiemens per                                                                                                                            
                                               centimeter at 25                                                                                                                            
                                               degrees Celsius                                                                                                                             

  00095                                        Specific          84       331        68        174.56                       268.5                         217.75     180.5      117.25     87.25
                                               conductance,                                                                                                                                
                                               wat., unf.,                                                                                                                                 
                                               microsiemens per                                                                                                                            
                                               centimeter at 25                                                                                                                            
                                               degrees Celsius                                                                                                                             

  00900                                        Hardness, wat.,   84       40         17        28.44                        37                            32.75      29         24         18.5
                                               unf., mg/L as                                                                                                                               
                                               calcium carbonate                                                                                                                           

  00915                                        Calcium, wat.,    84       9.9        4.3       7.051                        9.2                           8          7.1        6.125      4.625
                                               filt., mg/L                                                                                                                                 

  00925                                        Magnesium, wat.,  84       3.7        1.5       2.62                         3.475                         3          2.7        2.2        1.725
                                               filt., mg/L                                                                                                                                 

  00935                                        Potassium, wat.,  84       6.8        1.8       3.689                        6.1                           4.4        3.5        2.8        2.225
                                               filt., mg/L                                                                                                                                 

  00931                                        Sodium adsorption 84       3          0.4       1.704                        3                             2          2          1          0.725
                                               ratio, wat.,                                                                                                                                
                                               number                                                                                                                                      

  00930                                        Sodium, wat.,     84       48         4.3       21.171                       37                            28.75      21         12.25      7.125
                                               filt., mg/L                                                                                                                                 

  00932                                        Sodium, wat.,     84       70         25        55.595                       68                            62.75      57         50         41
                                               percent in                                                                                                                                  
                                               equivalents of                                                                                                                              
                                               major cations                                                                                                                               

  99430                                        Carbonate, wat.,  35       44         14        29.171                       43.2                          34         30         24         14.8
                                               unf., incremental                                                                                                                           
                                               titration, field,                                                                                                                           
                                               mg/L as calcium                                                                                                                             
                                               carbonate                                                                                                                                   

  90410                                        Acid neutralizing 84       48         12        29.071                       41.75                         34.75      29         23         16
                                               capacity, wat.,                                                                                                                             
                                               unf., fixed                                                                                                                                 
                                               endpoint (pH 4.5)                                                                                                                           
                                               titration,                                                                                                                                  
                                               laboratory, mg/L                                                                                                                            
                                               as calcium                                                                                                                                  
                                               carbonate                                                                                                                                   

  00410                                        Acid neutralizing 36       46         15        30.111                       43.45                         35.5       30.5       26         15.85
                                               capacity, wat.,                                                                                                                             
                                               unf., fixed                                                                                                                                 
                                               endpoint (pH 4.5)                                                                                                                           
                                               titration, field,                                                                                                                           
                                               mg/L as calcium                                                                                                                             
                                               carbonate                                                                                                                                   

  99440                                        Bicarbonate,      35       54         17        35.514                       52.4                          41         37         29         17.8
                                               wat., unf.,                                                                                                                                 
                                               incremental                                                                                                                                 
                                               titration, field,                                                                                                                           
                                               mg/L                                                                                                                                        

  99445                                        Carbonate, wat.,  12       0          \--       \--                          \--                           \--        \--        \--        \--
                                               unf., incremental                                                                                                                           
                                               titration, field,                                                                                                                           
                                               mg/L                                                                                                                                        

  00940                                        Chloride, wat.,   84       26         4.5       13.13                        23.75                         17         13         8.85       5.55
                                               filt., mg/L                                                                                                                                 

  00950                                        Fluoride, wat.,   82       1.3        \--       0.203\*                      \*0.300                       \*0.200    \*0.200    \*0.100    \*0.068
                                               filt., mg/L                                                                                                                                 

  00955                                        Silica, wat.,     84       13         3.7       9.513                        12.75                         11         9.65       8.325      6.4
                                               filt., mg/L                                                                                                                                 

  00945                                        Sulfate, wat.,    84       730        7.1       33.302                       54.5                          32         23         16         9.875
                                               filt., mg/L                                                                                                                                 

  99890                                        Sulfate, wat.,    6        \--        \--       \--                          \--                           \--        \--        \--        \--
                                               filt.,                                                                                                                                      
                                               uncorrected, mg/L                                                                                                                           

  70300                                        Residue on        84       203        48        112.714                      166                           139.75     113.5      84         63.25
                                               evaporation,                                                                                                                                
                                               dried at 180                                                                                                                                
                                               degrees Celsius,                                                                                                                            
                                               wat., filt., mg/L                                                                                                                           

  00608                                        Ammonia, wat.,    78       0.34       \--       0.058\*                      \*0.146                       \*0.070    \*0.040    \*0.030    \*0.012
                                               filt., mg/L as                                                                                                                              
                                               nitrogen                                                                                                                                    

  00623                                        Ammonia plus      74       2.1        0.2       0.486                        0.925                         0.6        0.4        0.3        0.2
                                               organic nitrogen,                                                                                                                           
                                               wat., filt., mg/L                                                                                                                           
                                               as nitrogen                                                                                                                                 

  00625                                        Ammonia plus      81       2.1        0.3       0.654                        0.99                          0.8        0.6        0.5        0.4
                                               organic nitrogen,                                                                                                                           
                                               wat., unf., mg/L                                                                                                                            
                                               as nitrogen                                                                                                                                 

  00610                                        Ammonia, wat.,    45       0.37       0.01      0.06                         0.148                         0.075      0.04       0.03       0.01
                                               unf., mg/L as                                                                                                                               
                                               nitrogen                                                                                                                                    

  00620                                        Nitrate, wat.,    34       2.48       0.29      1.294                        2.338                         1.89       1.285      0.59       0.357
                                               unf., mg/L as                                                                                                                               
                                               nitrogen                                                                                                                                    

  00631                                        Nitrite plus      78       3.2        0.3       1.479                        2.71                          2.125      1.4        0.815      0.398
                                               nitrate, wat.,                                                                                                                              
                                               filt., mg/L as                                                                                                                              
                                               nitrogen                                                                                                                                    

  00630                                        Nitrite plus      45       2.9        0.3       1.286                        2.47                          1.9        1.3        0.6        0.4
                                               nitrate, wat.,                                                                                                                              
                                               unf., mg/L as                                                                                                                               
                                               nitrogen                                                                                                                                    

  00613                                        Nitrite, wat.,    54       0.05       \--       0.012\*                      \*0.040                       \*0.012    \*0.010    \*0.005    \*0.002
                                               filt., mg/L as                                                                                                                              
                                               nitrogen                                                                                                                                    

  00615                                        Nitrite, wat.,    45       0.04       \--       0.014\*                      \*0.030                       \*0.020    \*0.010    \*0.009    \*0.005
                                               unf., mg/L as                                                                                                                               
                                               nitrogen                                                                                                                                    

  00605                                        Organic nitrogen, 77       2          0.25      0.603                        0.893                         0.675      0.57       0.46       0.36
                                               wat., unf., mg/L                                                                                                                            

  00666                                        Phosphorus, wat., 78       0.34       0.02      0.116                        0.311                         0.17       0.09       0.06       0.02
                                               filt., mg/L                                                                                                                                 

  00671                                        Orthophosphate,   78       0.33       0.01      0.107                        0.271                         0.16       0.08       0.05       0.02
                                               wat., filt., mg/L                                                                                                                           
                                               as phosphorus                                                                                                                               

  70507                                        Orthophosphate,   45       0.32       0.01      0.103                        0.307                         0.125      0.08       0.055      0.02
                                               wat., unf., mg/L                                                                                                                            
                                               as phosphorus                                                                                                                               

  00665                                        Phosphorus, wat., 80       0.49       0.03      0.177                        0.359                         0.228      0.15       0.112      0.08
                                               unf., mg/L                                                                                                                                  

  00680                                        Organic carbon,   84       16         4.8       7.567                        12.5                          8.525      6.9        6.1        5.025
                                               wat., unf., mg/L                                                                                                                            

  01105                                        Aluminum, wat.,   37       6800       170       1132.973                     5269.998                      935        630        375        179
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01002                                        Arsenic, wat.,    37       \--        \--       \--                          \--                           \--        \--        \--        \--
                                               unf., ug/L                                                                                                                                  

  01027                                        Cadmium, wat.,    37       \--        \--       \--                          \--                           \--        \--        \--        \--
                                               unf., ug/L                                                                                                                                  

  01034                                        Chromium, wat.,   37       48         \--       3.232\*                      \*12.000                      \*3.000    \*2.000    \*0.621    \*0.201
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01037                                        Cobalt, wat.,     37       5          \--       1.03\*                       \*3.200                       \*1.000    \*0.663    \*0.352    \*0.140
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01042                                        Copper, wat.,     36       99         1         10.583                       75.2                          9.5        5          4          1
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01045                                        Iron, wat., unf., 37       7200       220       1671.892                     6930                          1750       1200       900        319
                                               recoverable, ug/L                                                                                                                           

  01051                                        Lead, wat., unf., 36       42         \--       7.107\*                      \*33.500                      \*7.000    \*4.500    \*2.000    \*0.931
                                               recoverable, ug/L                                                                                                                           

  71900                                        Mercury, wat.,    35       \--        \--       \--                          \--                           \--        \--        \--        \--
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01062                                        Molybdenum, wat., 37       3          \--       1.062\*                      \*3.000                       \*1.000    \*1.000    \*0.507    \*0.252
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01067                                        Nickel, wat.,     36       7          1         2.167                        6.15                          2          2          1          1
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01147                                        Selenium, wat.,   37       \--        \--       \--                          \--                           \--        \--        \--        \--
                                               unf., ug/L                                                                                                                                  

  01077                                        Silver, wat.,     36       \--        \--       \--                          \--                           \--        \--        \--        \--
                                               unf.,                                                                                                                                       
                                               recoverable, ug/L                                                                                                                           

  01092                                        Zinc, wat., unf., 37       60         \--       16.863\*                     \*51.000                      \*20.000   \*10.000   \*6.565    \*2.877
                                               recoverable, ug/L                                                                                                                           

  80154                                        Suspended         78       458        4         64.077                       228.45                        73.75      37.5       23         8.95
                                               sediment                                                                                                                                    
                                               concentration,                                                                                                                              
                                               mg/L                                                                                                                                        
  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

<table>
<colgroup>
<col style="width: 7%" />
<col style="width: 24%" />
<col style="width: 6%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 6%" />
<col style="width: 8%" />
<col style="width: 0%" />
<col style="width: 7%" />
<col style="width: 8%" />
<col style="width: 8%" />
<col style="width: 8%" />
</colgroup>
<thead>
<tr class="header">
<th rowspan="2"><strong>NWIS Param-eter<br />
code</strong></th>
<th rowspan="2"><strong>Constituent name</strong></th>
<th rowspan="2">Sample size</th>
<th rowspan="2">Maximum</th>
<th rowspan="2">Minimum</th>
<th rowspan="2">Mean</th>
<th colspan="6"><strong>Percentile</strong></th>
</tr>
<tr class="odd">
<th colspan="2">95th</th>
<th>75th</th>
<th>50th</th>
<th><strong>25th</strong></th>
<th><strong>5th</strong></th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td colspan="12"><h3
id="swift-creek-near-apex-october-1988june-1995">02087580 <a
href="#swift-creek-near-apex-october-1988june-1995">Swift Creek near
Apex</a> (October 1988–June 1995)</h3></td>
</tr>
<tr class="even">
<td>00061</td>
<td>Discharge, instantaneous, cubic feet per second</td>
<td>45</td>
<td>111</td>
<td>0.19</td>
<td>9.758</td>
<td>39.3</td>
<td colspan="2">10.5</td>
<td>3.9</td>
<td>1.15</td>
<td>0.267</td>
</tr>
<tr class="odd">
<td>00080</td>
<td>Color, wat., filt., platinum cobalt units</td>
<td>74</td>
<td>280</td>
<td>4</td>
<td>74.662</td>
<td>135</td>
<td colspan="2">100</td>
<td>65</td>
<td>54.5</td>
<td>13.75</td>
</tr>
<tr class="even">
<td>00300</td>
<td>Dissolved oxygen, wat., unf., mg/L</td>
<td>74</td>
<td>13.8</td>
<td>3.9</td>
<td>8.541</td>
<td>13.125</td>
<td colspan="2">11.025</td>
<td>9</td>
<td>5.8</td>
<td>4.275</td>
</tr>
<tr class="odd">
<td>00301</td>
<td>Dissolved oxygen, wat., unf., percent of saturation</td>
<td>74</td>
<td>151</td>
<td>44</td>
<td>83.338</td>
<td>110.5</td>
<td colspan="2">94</td>
<td>84</td>
<td>67</td>
<td>51.75</td>
</tr>
<tr class="even">
<td>00400</td>
<td>pH, wat., unf., field, standard units</td>
<td>75</td>
<td>7.6</td>
<td>6</td>
<td>7.007</td>
<td>7.52</td>
<td colspan="2">7.2</td>
<td>7</td>
<td>6.9</td>
<td>6.3</td>
</tr>
<tr class="odd">
<td>00403</td>
<td>pH, wat., unf., laboratory, standard units</td>
<td>74</td>
<td>7.9</td>
<td>6.7</td>
<td>7.305</td>
<td>7.825</td>
<td colspan="2">7.5</td>
<td>7.3</td>
<td>7.1</td>
<td>6.9</td>
</tr>
<tr class="even">
<td>90095</td>
<td>Specific conductance, wat., unf., laboratory, microsiemens per
centimeter at 25 degrees Celsius</td>
<td>74</td>
<td>132</td>
<td>69</td>
<td>95.041</td>
<td>122.25</td>
<td colspan="2">106</td>
<td>91.5</td>
<td>84</td>
<td>74</td>
</tr>
<tr class="odd">
<td>00095</td>
<td>Specific conductance, wat., unf., microsiemens per centimeter at 25
degrees Celsius</td>
<td>75</td>
<td>130</td>
<td>68</td>
<td>93.067</td>
<td>126.4</td>
<td colspan="2">102</td>
<td>89</td>
<td>83</td>
<td>73.6</td>
</tr>
<tr class="even">
<td>00900</td>
<td>Hardness, wat., unf., mg/L as calcium carbonate</td>
<td>74</td>
<td>46</td>
<td>21</td>
<td>30.541</td>
<td>43.5</td>
<td colspan="2">35</td>
<td>28.5</td>
<td>25.75</td>
<td>23</td>
</tr>
<tr class="odd">
<td>00915</td>
<td>Calcium, wat., filt., mg/L</td>
<td>74</td>
<td>12</td>
<td>5.7</td>
<td>8.086</td>
<td>11.25</td>
<td colspan="2">9.325</td>
<td>7.65</td>
<td>6.8</td>
<td>6.175</td>
</tr>
<tr class="even">
<td>00925</td>
<td>Magnesium, wat., filt., mg/L</td>
<td>74</td>
<td>3.9</td>
<td>1.6</td>
<td>2.515</td>
<td>3.725</td>
<td colspan="2">2.925</td>
<td>2.3</td>
<td>2.1</td>
<td>1.775</td>
</tr>
<tr class="odd">
<td>00935</td>
<td>Potassium, wat., filt., mg/L</td>
<td>74</td>
<td>4.3</td>
<td>0.3</td>
<td>2.512</td>
<td>3.525</td>
<td colspan="2">2.8</td>
<td>2.5</td>
<td>2.1</td>
<td>1.775</td>
</tr>
<tr class="even">
<td>00931</td>
<td>Sodium adsorption ratio, wat., number</td>
<td>74</td>
<td>0.8</td>
<td>0.2</td>
<td>0.403</td>
<td>0.5</td>
<td colspan="2">0.4</td>
<td>0.4</td>
<td>0.4</td>
<td>0.3</td>
</tr>
<tr class="odd">
<td>00930</td>
<td>Sodium, wat., filt., mg/L</td>
<td>74</td>
<td>9.3</td>
<td>3.1</td>
<td>5.028</td>
<td>7.125</td>
<td colspan="2">5.625</td>
<td>4.9</td>
<td>4.375</td>
<td>3.275</td>
</tr>
<tr class="even">
<td>00932</td>
<td>Sodium, wat., percent in equivalents of major cations</td>
<td>74</td>
<td>41</td>
<td>16</td>
<td>24.459</td>
<td>30.25</td>
<td colspan="2">26.25</td>
<td>24</td>
<td>22</td>
<td>18.75</td>
</tr>
<tr class="odd">
<td>99430</td>
<td>Carbonate, wat., unf., incremental titration, field, mg/L as calcium
carbonate</td>
<td>33</td>
<td>52</td>
<td>17</td>
<td>30.667</td>
<td>49.9</td>
<td colspan="2">37</td>
<td>27</td>
<td>23</td>
<td>18.4</td>
</tr>
<tr class="even">
<td>90410</td>
<td>Acid neutralizing capacity, wat., unf., fixed endpoint (pH 4.5)
titration, laboratory, mg/L as calcium carbonate</td>
<td>74</td>
<td>48</td>
<td>13</td>
<td>30.446</td>
<td>48</td>
<td colspan="2">37</td>
<td>28</td>
<td>23</td>
<td>19.75</td>
</tr>
<tr class="odd">
<td>00410</td>
<td>Acid neutralizing capacity, wat., unf., fixed endpoint (pH 4.5)
titration, field, mg/L as calcium carbonate</td>
<td>33</td>
<td>54</td>
<td>17</td>
<td>31.212</td>
<td>52.6</td>
<td colspan="2">37</td>
<td>29</td>
<td>23</td>
<td>18.4</td>
</tr>
<tr class="even">
<td>99440</td>
<td>Bicarbonate, wat., unf., incremental titration, field, mg/L</td>
<td>33</td>
<td>63</td>
<td>21</td>
<td>37.394</td>
<td>60.9</td>
<td colspan="2">45</td>
<td>33</td>
<td>28</td>
<td>22.4</td>
</tr>
<tr class="odd">
<td>99445</td>
<td>Carbonate, wat., unf., incremental titration, field, mg/L</td>
<td>12</td>
<td>0</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>00940</td>
<td>Chloride, wat., filt., mg/L</td>
<td>74</td>
<td>7.6</td>
<td>0.3</td>
<td>5.442</td>
<td>7.325</td>
<td colspan="2">6.1</td>
<td>5.45</td>
<td>4.975</td>
<td>3.575</td>
</tr>
<tr class="odd">
<td>00950</td>
<td>Fluoride, wat., filt., mg/L</td>
<td>74</td>
<td>0.3</td>
<td>--</td>
<td>0.11*</td>
<td>*0.300</td>
<td colspan="2">*0.100</td>
<td>*0.100</td>
<td>*0.064</td>
<td>*0.037</td>
</tr>
<tr class="even">
<td>00955</td>
<td>Silica, wat., filt., mg/L</td>
<td>74</td>
<td>16</td>
<td>4.3</td>
<td>9.158</td>
<td>15</td>
<td colspan="2">11</td>
<td>8.75</td>
<td>7.25</td>
<td>4.95</td>
</tr>
<tr class="odd">
<td>00945</td>
<td>Sulfate, wat., filt., mg/L</td>
<td>74</td>
<td>12</td>
<td>1.4</td>
<td>5.809</td>
<td>8.65</td>
<td colspan="2">7</td>
<td>5.85</td>
<td>4.6</td>
<td>2.375</td>
</tr>
<tr class="even">
<td>99890</td>
<td>Sulfate, wat., filt., uncorrected, mg/L</td>
<td>5</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>70300</td>
<td>Residue on evaporation, dried at 180 degrees Celsius, wat., filt.,
mg/L</td>
<td>74</td>
<td>94</td>
<td>29</td>
<td>63.919</td>
<td>88.5</td>
<td colspan="2">72</td>
<td>62.5</td>
<td>56</td>
<td>42.25</td>
</tr>
<tr class="even">
<td>00608</td>
<td>Ammonia, wat., filt., mg/L as nitrogen</td>
<td>74</td>
<td>0.12</td>
<td>--</td>
<td>0.045*</td>
<td>*0.087</td>
<td colspan="2">*0.060</td>
<td>*0.040</td>
<td>*0.030</td>
<td>*0.010</td>
</tr>
<tr class="odd">
<td>00623</td>
<td>Ammonia plus organic nitrogen, wat., filt., mg/L as nitrogen</td>
<td>73</td>
<td>0.6</td>
<td>--</td>
<td>0.3*</td>
<td>*0.530</td>
<td colspan="2">*0.400</td>
<td>*0.300</td>
<td>*0.200</td>
<td>*0.152</td>
</tr>
<tr class="even">
<td>00625</td>
<td>Ammonia plus organic nitrogen, wat., unf., mg/L as nitrogen</td>
<td>74</td>
<td>1.1</td>
<td>0.2</td>
<td>0.446</td>
<td>0.8</td>
<td colspan="2">0.525</td>
<td>0.4</td>
<td>0.3</td>
<td>0.2</td>
</tr>
<tr class="odd">
<td>00610</td>
<td>Ammonia, wat., unf., mg/L as nitrogen</td>
<td>37</td>
<td>0.1</td>
<td>0.01</td>
<td>0.042</td>
<td>0.082</td>
<td colspan="2">0.06</td>
<td>0.04</td>
<td>0.03</td>
<td>0.01</td>
</tr>
<tr class="even">
<td>00620</td>
<td>Nitrate, wat., unf., mg/L as nitrogen</td>
<td>14</td>
<td>0.27</td>
<td>0.05</td>
<td>0.142</td>
<td>0.27</td>
<td colspan="2">0.19</td>
<td>0.145</td>
<td>0.07</td>
<td>0.05</td>
</tr>
<tr class="odd">
<td>00631</td>
<td>Nitrite plus nitrate, wat., filt., mg/L as nitrogen</td>
<td>74</td>
<td>0.3</td>
<td>--</td>
<td>0.133*</td>
<td>*0.262</td>
<td colspan="2">*0.200</td>
<td>*0.110</td>
<td>*0.069</td>
<td>*0.041</td>
</tr>
<tr class="even">
<td>00630</td>
<td>Nitrite plus nitrate, wat., unf., mg/L as nitrogen</td>
<td>37</td>
<td>0.3</td>
<td>--</td>
<td>0.117*</td>
<td>*0.246</td>
<td colspan="2">*0.195</td>
<td>*0.090</td>
<td>*0.064</td>
<td>*0.035</td>
</tr>
<tr class="odd">
<td>00613</td>
<td>Nitrite, wat., filt., mg/L as nitrogen</td>
<td>60</td>
<td>0.03</td>
<td>--</td>
<td>0.008*</td>
<td>*0.020</td>
<td colspan="2">*0.010</td>
<td>*0.007</td>
<td>*0.005</td>
<td>*0.003</td>
</tr>
<tr class="even">
<td>00615</td>
<td>Nitrite, wat., unf., mg/L as nitrogen</td>
<td>37</td>
<td>0.03</td>
<td>--</td>
<td>0.014*</td>
<td>*0.030</td>
<td colspan="2">*0.020</td>
<td>*0.010</td>
<td>*0.007</td>
<td>*0.004</td>
</tr>
<tr class="odd">
<td>00605</td>
<td>Organic nitrogen, wat., unf., mg/L</td>
<td>70</td>
<td>1</td>
<td>0.12</td>
<td>0.409</td>
<td>0.764</td>
<td colspan="2">0.505</td>
<td>0.37</td>
<td>0.278</td>
<td>0.181</td>
</tr>
<tr class="even">
<td>00666</td>
<td>Phosphorus, wat., filt., mg/L</td>
<td>74</td>
<td>0.04</td>
<td>--</td>
<td>0.012*</td>
<td>*0.022</td>
<td colspan="2">*0.020</td>
<td>*0.010</td>
<td>*0.007</td>
<td>*0.004</td>
</tr>
<tr class="odd">
<td>00671</td>
<td>Orthophosphate, wat., filt., mg/L as phosphorus</td>
<td>74</td>
<td>0.03</td>
<td>--</td>
<td>0.008*</td>
<td>*0.020</td>
<td colspan="2">*0.010</td>
<td>*0.007</td>
<td>*0.004</td>
<td>*0.002</td>
</tr>
<tr class="even">
<td>70507</td>
<td>Orthophosphate, wat., unf., mg/L as phosphorus</td>
<td>37</td>
<td>0.04</td>
<td>--</td>
<td>0.016*</td>
<td>*0.040</td>
<td colspan="2">*0.020</td>
<td>*0.010</td>
<td>*0.007</td>
<td>*0.003</td>
</tr>
<tr class="odd">
<td>00665</td>
<td>Phosphorus, wat., unf., mg/L</td>
<td>74</td>
<td>0.16</td>
<td>0.01</td>
<td>0.041</td>
<td>0.07</td>
<td colspan="2">0.05</td>
<td>0.04</td>
<td>0.03</td>
<td>0.01</td>
</tr>
<tr class="even">
<td>00680</td>
<td>Organic carbon, wat., unf., mg/L</td>
<td>73</td>
<td>14</td>
<td>3.8</td>
<td>6.345</td>
<td>10.23</td>
<td colspan="2">7.3</td>
<td>6</td>
<td>5.1</td>
<td>4.17</td>
</tr>
<tr class="odd">
<td>01105</td>
<td>Aluminum, wat., unf., recoverable, ug/L</td>
<td>26</td>
<td>2900</td>
<td>30</td>
<td>525.385</td>
<td>2690</td>
<td colspan="2">532.5</td>
<td>220</td>
<td>107.5</td>
<td>30</td>
</tr>
<tr class="even">
<td>01002</td>
<td>Arsenic, wat., unf., ug/L</td>
<td>25</td>
<td>2</td>
<td>--</td>
<td>0.845*</td>
<td>*1.700</td>
<td colspan="2">*1.000</td>
<td>*0.796</td>
<td>*0.648</td>
<td>*0.478</td>
</tr>
<tr class="odd">
<td>01027</td>
<td>Cadmium, wat., unf., ug/L</td>
<td>26</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>01034</td>
<td>Chromium, wat., unf., recoverable, ug/L</td>
<td>26</td>
<td>5</td>
<td>--</td>
<td>0.987*</td>
<td>*4.650</td>
<td colspan="2">*1.000</td>
<td>*0.426</td>
<td>*0.163</td>
<td>*0.040</td>
</tr>
<tr class="odd">
<td>01037</td>
<td>Cobalt, wat., unf., recoverable, ug/L</td>
<td>26</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>01042</td>
<td>Copper, wat., unf., recoverable, ug/L</td>
<td>25</td>
<td>6</td>
<td>1</td>
<td>2.36</td>
<td>5.7</td>
<td colspan="2">3</td>
<td>2</td>
<td>1.5</td>
<td>1</td>
</tr>
<tr class="odd">
<td>01045</td>
<td>Iron, wat., unf., recoverable, ug/L</td>
<td>26</td>
<td>5200</td>
<td>710</td>
<td>1471.538</td>
<td>4534.999</td>
<td colspan="2">1500</td>
<td>1150</td>
<td>1000</td>
<td>717</td>
</tr>
<tr class="even">
<td>01051</td>
<td>Lead, wat., unf., recoverable, ug/L</td>
<td>24</td>
<td>4</td>
<td>--</td>
<td>1.229*</td>
<td>*3.750</td>
<td colspan="2">*2.000</td>
<td>*0.932</td>
<td>*0.525</td>
<td>*0.238</td>
</tr>
<tr class="odd">
<td>01055</td>
<td>Manganese, wat., unf., recoverable, ug/L</td>
<td>26</td>
<td>380</td>
<td>50</td>
<td>142.692</td>
<td>362.5</td>
<td colspan="2">185</td>
<td>105</td>
<td>87.5</td>
<td>50</td>
</tr>
<tr class="even">
<td>71900</td>
<td>Mercury, wat., unf., recoverable, ug/L</td>
<td>26</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>01062</td>
<td>Molybdenum, wat., unf., recoverable, ug/L</td>
<td>26</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>01067</td>
<td>Nickel, wat., unf., recoverable, ug/L</td>
<td>24</td>
<td>4</td>
<td>--</td>
<td>0.975*</td>
<td>*3.500</td>
<td colspan="2">*1.000</td>
<td>*0.677</td>
<td>*0.377</td>
<td>*0.159</td>
</tr>
<tr class="odd">
<td>01147</td>
<td>Selenium, wat., unf., ug/L</td>
<td>26</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>01077</td>
<td>Silver, wat., unf., recoverable, ug/L</td>
<td>26</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>01092</td>
<td>Zinc, wat., unf., recoverable, ug/L</td>
<td>26</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>80154</td>
<td>Suspended sediment concentration, mg/L</td>
<td>68</td>
<td>427</td>
<td>2</td>
<td>25.441</td>
<td>93.65</td>
<td colspan="2">21.75</td>
<td>13</td>
<td>8</td>
<td>3</td>
</tr>
</tbody>
</table>

<table>
<colgroup>
<col style="width: 7%" />
<col style="width: 24%" />
<col style="width: 6%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 6%" />
<col style="width: 8%" />
<col style="width: 0%" />
<col style="width: 7%" />
<col style="width: 8%" />
<col style="width: 8%" />
<col style="width: 8%" />
</colgroup>
<thead>
<tr class="header">
<th rowspan="2"><strong>NWIS Param-eter<br />
code</strong></th>
<th rowspan="2"><strong>Constituent name</strong></th>
<th rowspan="2">Sample size</th>
<th rowspan="2">Maximum</th>
<th rowspan="2">Minimum</th>
<th rowspan="2">Mean</th>
<th colspan="6"><strong>Percentile</strong></th>
</tr>
<tr class="odd">
<th colspan="2">95th</th>
<th>75th</th>
<th>50th</th>
<th><strong>25th</strong></th>
<th><strong>5th</strong></th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td colspan="12"><h3
id="lake-benson-at-dam-near-garner-october-1989june-1995"><a
href="#_02087701__Lake_Benson_at_dam_near_G"><span
id="_02087701__Lake_Benson_at_dam_near_G" class="anchor"></span>02087701
Lake Benson at dam near Garner (October 1989–June 1995)</a></h3></td>
</tr>
<tr class="even">
<td>00080</td>
<td>Color, wat., filt., platinum cobalt units</td>
<td>29</td>
<td>120.000</td>
<td>2.000</td>
<td>34.241</td>
<td>115.000</td>
<td colspan="2">34.000</td>
<td>24.000</td>
<td>18.000</td>
<td>2.500</td>
</tr>
<tr class="odd">
<td>00078</td>
<td>Transparency, wat., unf., Secchi disc, meters</td>
<td>13</td>
<td>1.600</td>
<td>0.450</td>
<td>0.769</td>
<td>1.600</td>
<td colspan="2">0.950</td>
<td>0.650</td>
<td>0.500</td>
<td>0.450</td>
</tr>
<tr class="even">
<td>00300</td>
<td>Dissolved oxygen, wat., unf., mg/L</td>
<td>27</td>
<td>11.200</td>
<td>4.270</td>
<td>8.173</td>
<td>11.000</td>
<td colspan="2">9.800</td>
<td>8.500</td>
<td>6.800</td>
<td>4.402</td>
</tr>
<tr class="odd">
<td>00301</td>
<td>Dissolved oxygen, wat., unf., percent of saturation</td>
<td>27</td>
<td>139.000</td>
<td>51.000</td>
<td>95.593</td>
<td>137.800</td>
<td colspan="2">113.000</td>
<td>100.000</td>
<td>76.000</td>
<td>52.200</td>
</tr>
<tr class="even">
<td>00400</td>
<td>pH, wat., unf., field, standard units</td>
<td>29</td>
<td>8.620</td>
<td>6.450</td>
<td>7.091</td>
<td>8.475</td>
<td colspan="2">7.200</td>
<td>7.030</td>
<td>6.720</td>
<td>6.450</td>
</tr>
<tr class="odd">
<td>00403</td>
<td>pH, wat., unf., laboratory, standard units</td>
<td>29</td>
<td>8.900</td>
<td>6.700</td>
<td>7.459</td>
<td>8.550</td>
<td colspan="2">7.800</td>
<td>7.400</td>
<td>7.150</td>
<td>6.800</td>
</tr>
<tr class="even">
<td>90095</td>
<td>Specific conductance, wat., unf., laboratory, microsiemens per
centimeter at 25 degrees Celsius</td>
<td>29</td>
<td>92.000</td>
<td>58.000</td>
<td>71.172</td>
<td>88.500</td>
<td colspan="2">77.000</td>
<td>71.000</td>
<td>63.000</td>
<td>58.500</td>
</tr>
<tr class="odd">
<td>00095</td>
<td>Specific conductance, wat., unf., microsiemens per centimeter at 25
degrees Celsius</td>
<td>29</td>
<td>94.000</td>
<td>53.000</td>
<td>69.834</td>
<td>88.500</td>
<td colspan="2">74.500</td>
<td>70.000</td>
<td>63.000</td>
<td>56.000</td>
</tr>
<tr class="even">
<td>00900</td>
<td>Hardness, wat., unf., mg/L as calcium carbonate</td>
<td>29</td>
<td>31.000</td>
<td>16.000</td>
<td>21.172</td>
<td>29.500</td>
<td colspan="2">23.000</td>
<td>20.000</td>
<td>19.000</td>
<td>16.500</td>
</tr>
<tr class="odd">
<td>00915</td>
<td>Calcium, wat., filt., mg/L</td>
<td>29</td>
<td>7.600</td>
<td>3.900</td>
<td>5.183</td>
<td>7.300</td>
<td colspan="2">5.650</td>
<td>5.000</td>
<td>4.600</td>
<td>4.000</td>
</tr>
<tr class="even">
<td>00925</td>
<td>Magnesium, wat., filt., mg/L</td>
<td>29</td>
<td>2.800</td>
<td>1.500</td>
<td>1.983</td>
<td>2.700</td>
<td colspan="2">2.150</td>
<td>1.900</td>
<td>1.800</td>
<td>1.550</td>
</tr>
<tr class="odd">
<td>00935</td>
<td>Potassium, wat., filt., mg/L</td>
<td>29</td>
<td>11.000</td>
<td>0.700</td>
<td>2.290</td>
<td>7.100</td>
<td colspan="2">2.500</td>
<td>2.100</td>
<td>1.250</td>
<td>0.750</td>
</tr>
<tr class="even">
<td>00931</td>
<td>Sodium adsorption ratio, wat., number</td>
<td>29</td>
<td>0.500</td>
<td>0.300</td>
<td>0.414</td>
<td>0.500</td>
<td colspan="2">0.400</td>
<td>0.400</td>
<td>0.400</td>
<td>0.350</td>
</tr>
<tr class="odd">
<td>00930</td>
<td>Sodium, wat., filt., mg/L</td>
<td>29</td>
<td>5.300</td>
<td>2.900</td>
<td>4.379</td>
<td>5.150</td>
<td colspan="2">4.800</td>
<td>4.400</td>
<td>4.000</td>
<td>3.250</td>
</tr>
<tr class="even">
<td>00932</td>
<td>Sodium, wat., percent in equivalents of major cations</td>
<td>29</td>
<td>33.000</td>
<td>23.000</td>
<td>28.517</td>
<td>32.500</td>
<td colspan="2">30.000</td>
<td>29.000</td>
<td>27.000</td>
<td>23.500</td>
</tr>
<tr class="odd">
<td>99430</td>
<td>Carbonate, wat., unf., incremental titration, field, mg/L as calcium
carbonate</td>
<td>13</td>
<td>34.000</td>
<td>13.000</td>
<td>22.385</td>
<td>34.000</td>
<td colspan="2">26.500</td>
<td>23.000</td>
<td>19.000</td>
<td>13.000</td>
</tr>
<tr class="even">
<td>90410</td>
<td>Acid neutralizing capacity, wat., unf., fixed endpoint (pH 4.5)
titration, laboratory, mg/L as calcium carbonate</td>
<td>29</td>
<td>34.000</td>
<td>14.000</td>
<td>22.552</td>
<td>31.000</td>
<td colspan="2">25.500</td>
<td>22.000</td>
<td>19.500</td>
<td>15.000</td>
</tr>
<tr class="odd">
<td>00410</td>
<td>Acid neutralizing capacity, wat., unf., fixed endpoint (pH 4.5)
titration, field, mg/L as calcium carbonate</td>
<td>13</td>
<td>40.000</td>
<td>13.000</td>
<td>22.923</td>
<td>40.000</td>
<td colspan="2">26.500</td>
<td>23.000</td>
<td>18.000</td>
<td>13.000</td>
</tr>
<tr class="even">
<td>99440</td>
<td>Bicarbonate, wat., unf., incremental titration, field, mg/L</td>
<td>13</td>
<td>41.000</td>
<td>16.000</td>
<td>27.154</td>
<td>41.000</td>
<td colspan="2">32.500</td>
<td>28.000</td>
<td>23.000</td>
<td>16.000</td>
</tr>
<tr class="odd">
<td>99445</td>
<td>Carbonate, wat., unf., incremental titration, field, mg/L</td>
<td>10</td>
<td>0.000</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>00940</td>
<td>Chloride, wat., filt., mg/L</td>
<td>28</td>
<td>5.800</td>
<td>3.300</td>
<td>4.371</td>
<td>5.665</td>
<td colspan="2">4.875</td>
<td>4.350</td>
<td>3.825</td>
<td>3.345</td>
</tr>
<tr class="odd">
<td>00950</td>
<td>Fluoride, wat., filt., mg/L</td>
<td>29</td>
<td>0.300</td>
<td>--</td>
<td>0.102*</td>
<td>*0.250</td>
<td colspan="2">*0.100</td>
<td>*0.100</td>
<td>*0.058</td>
<td>*0.034</td>
</tr>
<tr class="even">
<td>00955</td>
<td>Silica, wat., filt., mg/L</td>
<td>29</td>
<td>11.000</td>
<td>0.800</td>
<td>6.090</td>
<td>11.000</td>
<td colspan="2">8.350</td>
<td>6.600</td>
<td>3.750</td>
<td>1.000</td>
</tr>
<tr class="odd">
<td>00945</td>
<td>Sulfate, wat., filt., mg/L</td>
<td>29</td>
<td>6.500</td>
<td>2.900</td>
<td>4.210</td>
<td>6.250</td>
<td colspan="2">4.850</td>
<td>4.000</td>
<td>3.550</td>
<td>2.900</td>
</tr>
<tr class="even">
<td>99890</td>
<td>Sulfate, wat., filt., uncorrected, mg/L</td>
<td>1</td>
<td>7.500</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>70300</td>
<td>Residue on evaporation, dried at 180 degrees Celsius, wat., filt.,
mg/L</td>
<td>29</td>
<td>76.000</td>
<td>32.000</td>
<td>48.724</td>
<td>74.500</td>
<td colspan="2">53.000</td>
<td>48.000</td>
<td>42.500</td>
<td>33.000</td>
</tr>
<tr class="even">
<td>00608</td>
<td>Ammonia, wat., filt., mg/L as nitrogen</td>
<td>29</td>
<td>0.200</td>
<td>--</td>
<td>0.049*</td>
<td>*0.195</td>
<td colspan="2">*0.055</td>
<td>*0.030</td>
<td>*0.020</td>
<td>*0.006</td>
</tr>
<tr class="odd">
<td>00623</td>
<td>Ammonia plus organic nitrogen, wat., filt., mg/L as nitrogen</td>
<td>29</td>
<td>0.700</td>
<td>0.200</td>
<td>0.400</td>
<td>0.650</td>
<td colspan="2">0.500</td>
<td>0.400</td>
<td>0.300</td>
<td>0.200</td>
</tr>
<tr class="even">
<td>00625</td>
<td>Ammonia plus organic nitrogen, wat., unf., mg/L as nitrogen</td>
<td>29</td>
<td>3.800</td>
<td>0.400</td>
<td>0.731</td>
<td>2.750</td>
<td colspan="2">0.700</td>
<td>0.600</td>
<td>0.450</td>
<td>0.400</td>
</tr>
<tr class="odd">
<td>00610</td>
<td>Ammonia, wat., unf., mg/L as nitrogen</td>
<td>14</td>
<td>0.200</td>
<td>--</td>
<td>0.046*</td>
<td>*0.200</td>
<td colspan="2">*0.058</td>
<td>*0.030</td>
<td>*0.010</td>
<td>*0.003</td>
</tr>
<tr class="even">
<td>00620</td>
<td>Nitrate, wat., unf., mg/L as nitrogen</td>
<td>3</td>
<td>0.150</td>
<td>0.040</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>00631</td>
<td>Nitrite plus nitrate, wat., filt., mg/L as nitrogen</td>
<td>29</td>
<td>0.200</td>
<td>--</td>
<td>0.041*</td>
<td>*0.165</td>
<td colspan="2">*0.054</td>
<td>*0.027</td>
<td>*0.013</td>
<td>*0.005</td>
</tr>
<tr class="even">
<td>00630</td>
<td>Nitrite plus nitrate, wat., unf., mg/L as nitrogen</td>
<td>14</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>00613</td>
<td>Nitrite, wat., filt., mg/L as nitrogen</td>
<td>23</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>00615</td>
<td>Nitrite, wat., unf., mg/L as nitrogen</td>
<td>14</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>00605</td>
<td>Organic nitrogen, wat., unf., mg/L</td>
<td>27</td>
<td>3.800</td>
<td>0.330</td>
<td>0.704</td>
<td>2.920</td>
<td colspan="2">0.640</td>
<td>0.550</td>
<td>0.390</td>
<td>0.342</td>
</tr>
<tr class="even">
<td>00666</td>
<td>Phosphorus, wat., filt., mg/L</td>
<td>29</td>
<td>0.030</td>
<td>--</td>
<td>0.009*</td>
<td>*0.025</td>
<td colspan="2">*0.010</td>
<td>*0.007</td>
<td>*0.004</td>
<td>*0.002</td>
</tr>
<tr class="odd">
<td>00671</td>
<td>Orthophosphate, wat., filt., mg/L as phosphorus</td>
<td>29</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>70507</td>
<td>Orthophosphate, wat., unf., mg/L as phosphorus</td>
<td>14</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>00665</td>
<td>Phosphorus, wat., unf., mg/L</td>
<td>29</td>
<td>0.080</td>
<td>0.000</td>
<td>0.031</td>
<td>0.070</td>
<td colspan="2">0.040</td>
<td>0.030</td>
<td>0.015</td>
<td>0.005</td>
</tr>
<tr class="even">
<td>00680</td>
<td>Organic carbon, wat., unf., mg/L</td>
<td>29</td>
<td>18.000</td>
<td>5.600</td>
<td>8.269</td>
<td>17.500</td>
<td colspan="2">8.700</td>
<td>7.400</td>
<td>6.550</td>
<td>5.600</td>
</tr>
<tr class="odd">
<td>70953</td>
<td>Chlorophyll a, phytoplankton, chromatographic-fluorometric method,
ug/L</td>
<td>29</td>
<td>26.300</td>
<td>0.100</td>
<td>7.445</td>
<td>21.400</td>
<td colspan="2">10.500</td>
<td>6.100</td>
<td>3.150</td>
<td>0.800</td>
</tr>
<tr class="even">
<td>70954</td>
<td>Chlorophyll b, phytoplankton, chromatographic-fluorometric method,
ug/L</td>
<td>29</td>
<td>1.700</td>
<td>--</td>
<td>0.394*</td>
<td>*1.500</td>
<td colspan="2">*0.500</td>
<td>*0.200</td>
<td>*0.109</td>
<td>*0.045</td>
</tr>
<tr class="odd">
<td>01105</td>
<td>Aluminum, wat., unf., recoverable, ug/L</td>
<td>29</td>
<td>1600.000</td>
<td>10.000</td>
<td>217.241</td>
<td>1400.000</td>
<td colspan="2">210.000</td>
<td>100.000</td>
<td>70.000</td>
<td>25.000</td>
</tr>
<tr class="even">
<td>01002</td>
<td>Arsenic, wat., unf., ug/L</td>
<td>29</td>
<td>1.000</td>
<td>--</td>
<td>1.000*</td>
<td>*1.000</td>
<td colspan="2">*1.000</td>
<td>*1.000</td>
<td>*1.000</td>
<td>*1.000</td>
</tr>
<tr class="odd">
<td>01027</td>
<td>Cadmium, wat., unf., ug/L</td>
<td>29</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>01034</td>
<td>Chromium, wat., unf., recoverable, ug/L</td>
<td>29</td>
<td>3.000</td>
<td>--</td>
<td>0.809*</td>
<td>*2.500</td>
<td colspan="2">*1.000</td>
<td>*0.674</td>
<td>*0.458</td>
<td>*0.259</td>
</tr>
<tr class="odd">
<td>01037</td>
<td>Cobalt, wat., unf., recoverable, ug/L</td>
<td>29</td>
<td>2.000</td>
<td>--</td>
<td>0.588*</td>
<td>*1.500</td>
<td colspan="2">*0.742</td>
<td>*0.492</td>
<td>*0.325</td>
<td>*0.177</td>
</tr>
<tr class="even">
<td>01042</td>
<td>Copper, wat., unf., recoverable, ug/L</td>
<td>28</td>
<td>6.000</td>
<td>1.000</td>
<td>2.357</td>
<td>5.550</td>
<td colspan="2">3.000</td>
<td>2.000</td>
<td>1.250</td>
<td>1.000</td>
</tr>
<tr class="odd">
<td>01045</td>
<td>Iron, wat., unf., recoverable, ug/L</td>
<td>29</td>
<td>2100.000</td>
<td>150.000</td>
<td>675.862</td>
<td>1950.000</td>
<td colspan="2">880.000</td>
<td>450.000</td>
<td>325.000</td>
<td>185.000</td>
</tr>
<tr class="even">
<td>01051</td>
<td>Lead, wat., unf., recoverable, ug/L</td>
<td>28</td>
<td>3.000</td>
<td>--</td>
<td>1.179*</td>
<td>*3.000</td>
<td colspan="2">*2.000</td>
<td>*0.908</td>
<td>*0.486</td>
<td>*0.214</td>
</tr>
<tr class="odd">
<td>01055</td>
<td>Manganese, wat., unf., recoverable, ug/L</td>
<td>29</td>
<td>1400.000</td>
<td>30.000</td>
<td>243.448</td>
<td>1085.000</td>
<td colspan="2">280.000</td>
<td>140.000</td>
<td>70.000</td>
<td>35.000</td>
</tr>
<tr class="even">
<td>71900</td>
<td>Mercury, wat., unf., recoverable, ug/L</td>
<td>28</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>01062</td>
<td>Molybdenum, wat., unf., recoverable, ug/L</td>
<td>29</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>01067</td>
<td>Nickel, wat., unf., recoverable, ug/L</td>
<td>28</td>
<td>3.000</td>
<td>--</td>
<td>1.115*</td>
<td>*2.550</td>
<td colspan="2">*2.000</td>
<td>*0.937</td>
<td>*0.581</td>
<td>*0.305</td>
</tr>
<tr class="odd">
<td>01147</td>
<td>Selenium, wat., unf., ug/L</td>
<td>29</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>01077</td>
<td>Silver, wat., unf., recoverable, ug/L</td>
<td>29</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="odd">
<td>01092</td>
<td>Zinc, wat., unf., recoverable, ug/L</td>
<td>29</td>
<td>20.000</td>
<td>--</td>
<td>6.432*</td>
<td>*20.000</td>
<td colspan="2">*8.924</td>
<td>*4.688</td>
<td>*2.669</td>
<td>*1.172</td>
</tr>
</tbody>
</table>

<table>
<colgroup>
<col style="width: 7%" />
<col style="width: 24%" />
<col style="width: 6%" />
<col style="width: 7%" />
<col style="width: 7%" />
<col style="width: 6%" />
<col style="width: 8%" />
<col style="width: 0%" />
<col style="width: 7%" />
<col style="width: 8%" />
<col style="width: 8%" />
<col style="width: 8%" />
</colgroup>
<thead>
<tr class="header">
<th rowspan="2"><strong>NWIS Param-eter<br />
code</strong></th>
<th rowspan="2"><strong>Constituent name</strong></th>
<th rowspan="2">Sample size</th>
<th rowspan="2">Maximum</th>
<th rowspan="2">Minimum</th>
<th rowspan="2">Mean</th>
<th colspan="6"><strong>Percentile</strong></th>
</tr>
<tr class="odd">
<th colspan="2">95th</th>
<th>75th</th>
<th>50th</th>
<th><strong>25th</strong></th>
<th><strong>5th</strong></th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td colspan="12"><h3
id="cane-creek-near-orange-grove-october-1988september-2001"><a
href="#_02096846__Cane_Creek_near_Orange_Gr"><span
id="_02096846__Cane_Creek_near_Orange_Gr" class="anchor"></span>02096846
Cane Creek near Orange Grove (October 1988–September 2001)</a></h3></td>
</tr>
<tr class="even">
<td>00061</td>
<td>Discharge, instantaneous, cubic feet per second</td>
<td>130</td>
<td>625.000</td>
<td>0.010</td>
<td>22.523</td>
<td>150.900</td>
<td colspan="2">6.250</td>
<td>2.200</td>
<td>0.493</td>
<td>0.050</td>
</tr>
<tr class="odd">
<td>00080</td>
<td>Color, wat., filt., platinum cobalt units</td>
<td>123</td>
<td>250.000</td>
<td>1.000</td>
<td>55.537</td>
<td>140.000</td>
<td colspan="2">65.000</td>
<td>45.000</td>
<td>30.000</td>
<td>18.400</td>
</tr>
<tr class="even">
<td>00300</td>
<td>Dissolved oxygen, wat., unf., mg/L</td>
<td>121</td>
<td>15.400</td>
<td>3.100</td>
<td>9.461</td>
<td>13.980</td>
<td colspan="2">11.600</td>
<td>9.000</td>
<td>7.445</td>
<td>5.300</td>
</tr>
<tr class="odd">
<td>00301</td>
<td>Dissolved oxygen, wat., unf., percent of saturation</td>
<td>118</td>
<td>169.000</td>
<td>31.000</td>
<td>92.153</td>
<td>123.100</td>
<td colspan="2">102.000</td>
<td>92.000</td>
<td>84.750</td>
<td>55.800</td>
</tr>
<tr class="even">
<td>00400</td>
<td>pH, wat., unf., field, standard units</td>
<td>130</td>
<td>8.100</td>
<td>5.500</td>
<td>6.945</td>
<td>7.545</td>
<td colspan="2">7.207</td>
<td>7.080</td>
<td>6.790</td>
<td>5.957</td>
</tr>
<tr class="odd">
<td>00403</td>
<td>pH, wat., unf., laboratory, standard units</td>
<td>123</td>
<td>9.100</td>
<td>6.500</td>
<td>7.357</td>
<td>7.980</td>
<td colspan="2">7.500</td>
<td>7.300</td>
<td>7.100</td>
<td>6.700</td>
</tr>
<tr class="even">
<td>90095</td>
<td>Specific conductance, wat., unf., laboratory, microsiemens per
centimeter at 25 degrees Celsius</td>
<td>122</td>
<td>178.000</td>
<td>28.000</td>
<td>88.885</td>
<td>125.000</td>
<td colspan="2">102.000</td>
<td>85.000</td>
<td>73.500</td>
<td>59.000</td>
</tr>
<tr class="odd">
<td>00095</td>
<td>Specific conductance, wat., unf., microsiemens per centimeter at 25
degrees Celsius</td>
<td>129</td>
<td>175.000</td>
<td>26.000</td>
<td>85.647</td>
<td>125.000</td>
<td colspan="2">98.000</td>
<td>82.000</td>
<td>69.800</td>
<td>51.000</td>
</tr>
<tr class="even">
<td>00900</td>
<td>Hardness, wat., unf., mg/L as calcium carbonate</td>
<td>123</td>
<td>58.000</td>
<td>8.000</td>
<td>28.244</td>
<td>43.800</td>
<td colspan="2">34.000</td>
<td>27.000</td>
<td>22.000</td>
<td>17.000</td>
</tr>
<tr class="odd">
<td>00915</td>
<td>Calcium, wat., filt., mg/L</td>
<td>123</td>
<td>14.000</td>
<td>1.900</td>
<td>7.013</td>
<td>11.000</td>
<td colspan="2">8.300</td>
<td>6.700</td>
<td>5.400</td>
<td>4.100</td>
</tr>
<tr class="even">
<td>00925</td>
<td>Magnesium, wat., filt., mg/L</td>
<td>123</td>
<td>5.600</td>
<td>0.800</td>
<td>2.613</td>
<td>3.960</td>
<td colspan="2">3.100</td>
<td>2.500</td>
<td>2.100</td>
<td>1.620</td>
</tr>
<tr class="odd">
<td>00935</td>
<td>Potassium, wat., filt., mg/L</td>
<td>123</td>
<td>13.000</td>
<td>0.400</td>
<td>2.233</td>
<td>6.340</td>
<td colspan="2">2.600</td>
<td>1.600</td>
<td>1.000</td>
<td>0.700</td>
</tr>
<tr class="even">
<td>00931</td>
<td>Sodium adsorption ratio, wat., number</td>
<td>123</td>
<td>0.500</td>
<td>0.200</td>
<td>0.395</td>
<td>0.500</td>
<td colspan="2">0.400</td>
<td>0.400</td>
<td>0.400</td>
<td>0.300</td>
</tr>
<tr class="odd">
<td>00930</td>
<td>Sodium, wat., filt., mg/L</td>
<td>123</td>
<td>6.600</td>
<td>1.200</td>
<td>4.837</td>
<td>6.180</td>
<td colspan="2">5.400</td>
<td>4.900</td>
<td>4.400</td>
<td>3.200</td>
</tr>
<tr class="even">
<td>00932</td>
<td>Sodium, wat., percent in equivalents of major cations</td>
<td>123</td>
<td>34.000</td>
<td>14.000</td>
<td>26.057</td>
<td>32.800</td>
<td colspan="2">29.000</td>
<td>26.000</td>
<td>23.000</td>
<td>19.000</td>
</tr>
<tr class="odd">
<td>99430</td>
<td>Carbonate, wat., unf., incremental titration, field, mg/L as calcium
carbonate</td>
<td>56</td>
<td>66.000</td>
<td>5.000</td>
<td>28.804</td>
<td>52.150</td>
<td colspan="2">35.000</td>
<td>27.500</td>
<td>20.000</td>
<td>10.850</td>
</tr>
<tr class="even">
<td>90410</td>
<td>Acid neutralizing capacity, wat., unf., fixed endpoint (pH 4.5)
titration, laboratory, mg/L as calcium carbonate</td>
<td>123</td>
<td>65.000</td>
<td>5.900</td>
<td>27.280</td>
<td>48.800</td>
<td colspan="2">35.000</td>
<td>24.000</td>
<td>19.000</td>
<td>12.000</td>
</tr>
<tr class="odd">
<td>39086</td>
<td>Alkalinity, wat., filt., incremental titration, field, mg/L as
calcium carbonate</td>
<td>2</td>
<td>53.000</td>
<td>26.000</td>
<td>--</td>
<td>--</td>
<td colspan="2">--</td>
<td>--</td>
<td>--</td>
<td>--</td>
</tr>
<tr class="even">
<td>00410</td>
<td>Acid neutralizing capacity, wat., unf., fixed endpoint (pH 4.5)
titration, field, mg/L as calcium carbonate</td>
<td>57</td>
<td>67.000</td>
<td>10.000</td>
<td>28.877</td>
<td>52.100</td>
<td colspan="2">35.000</td>
<td>27.000</td>
<td>20.000</td>
<td>11.900</td>
</tr>
</tbody>
</table>

  -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent     Sample   Maximum    Minimum   Mean      **Percentile**                                                   
  code**                                         name**            size                                                                                                     
  ---------------------------------------------- ----------------- -------- ---------- --------- --------- ---------------- --------- --------- ------ --------- ---------- ---------
                                                                                                           95th                                 75th   50th      **25th**   **5th**

  00419                                          Acid neutralizing 13       62.000     7.000     25.615    62.000                     31.500           21.000    17.500     7.000
                                                 capacity, wat.,                                                                                                            
                                                 unf., incremental                                                                                                          
                                                 titration, field,                                                                                                          
                                                 mg/L as calcium                                                                                                            
                                                 carbonate                                                                                                                  

  99440                                          Bicarbonate,      69       81.000     5.000     34.443    63.500                     42.000           33.000    23.500     12.000
                                                 wat., unf.,                                                                                                                
                                                 incremental                                                                                                                
                                                 titration, field,                                                                                                          
                                                 mg/L                                                                                                                       

  00453                                          Bicarbonate,      1        32.000     \--       \--       \--                        \--              \--       \--        \--
                                                 wat., filt.,                                                                                                               
                                                 incremental                                                                                                                
                                                 titration, field,                                                                                                          
                                                 mg/L                                                                                                                       

  00440                                          Bicarbonate,      1        64.000     \--       \--       \--                        \--              \--       \--        \--
                                                 wat., unf., fixed                                                                                                          
                                                 endpoint (pH 4.5)                                                                                                          
                                                 titration, field,                                                                                                          
                                                 mg/L                                                                                                                       

  99445                                          Carbonate, wat.,  12       0.000      \--       \--       \--                        \--              \--       \--        \--
                                                 unf., incremental                                                                                                          
                                                 titration, field,                                                                                                          
                                                 mg/L                                                                                                                       

  00452                                          Carbonate, wat.,  1        0.000      \--       \--       \--                        \--              \--       \--        \--
                                                 filt.,                                                                                                                     
                                                 incremental                                                                                                                
                                                 titration, field,                                                                                                          
                                                 mg/L                                                                                                                       

  00940                                          Chloride, wat.,   118      11.000     3.100     6.169     8.700                      6.800            5.950     5.300      3.995
                                                 filt., mg/L                                                                                                                

  00950                                          Fluoride, wat.,   118      0.300      \--       0.075\*   \*0.200                    \*0.100          \*0.063   \*0.042    \*0.024
                                                 filt., mg/L                                                                                                                

  00955                                          Silica, wat.,     118      30.000     0.100     13.025    17.000                     15.000           13.000    11.000     6.790
                                                 filt., mg/L                                                                                                                

  00945                                          Sulfate, wat.,    117      12.000     1.300     3.817     8.010                      4.750            3.500     2.400      1.500
                                                 filt., mg/L                                                                                                                

  99890                                          Sulfate, wat.,    7        \--        \--       \--       \--                        \--              \--       \--        \--
                                                 filt.,                                                                                                                     
                                                 uncorrected, mg/L                                                                                                          

  70300                                          Residue on        117      146.000    25.000    66.248    92.900                     74.000           65.000    56.500     43.800
                                                 evaporation,                                                                                                               
                                                 dried at 180                                                                                                               
                                                 degrees Celsius,                                                                                                           
                                                 wat., filt., mg/L                                                                                                          

  00608                                          Ammonia, wat.,    122      0.360      \--       0.036\*   \*0.110                    \*0.040          \*0.020   \*0.009    \*0.003
                                                 filt., mg/L as                                                                                                             
                                                 nitrogen                                                                                                                   

  00623                                          Ammonia plus      84       1.300      \--       0.349\*   \*0.900                    \*0.400          \*0.300   \*0.200    \*0.117
                                                 organic nitrogen,                                                                                                          
                                                 wat., filt., mg/L                                                                                                          
                                                 as nitrogen                                                                                                                

  00625                                          Ammonia plus      122      2.300      \--       0.441\*   \*1.270                    \*0.500          \*0.300   \*0.200    \*0.116
                                                 organic nitrogen,                                                                                                          
                                                 wat., unf., mg/L                                                                                                           
                                                 as nitrogen                                                                                                                

  00610                                          Ammonia, wat.,    45       0.340      \--       0.050\*   \*0.272                    \*0.045          \*0.030   \*0.020    \*0.004
                                                 unf., mg/L as                                                                                                              
                                                 nitrogen                                                                                                                   

  00620                                          Nitrate, wat.,    24       1.240      0.070     0.667     1.217                      0.957            0.690     0.375      0.082
                                                 unf., mg/L as                                                                                                              
                                                 nitrogen                                                                                                                   

  00631                                          Nitrite plus      122      1.400      0.005     0.585     1.100                      0.795            0.600     0.338      0.050
                                                 nitrate, wat.,                                                                                                             
                                                 filt., mg/L as                                                                                                             
                                                 nitrogen                                                                                                                   

  00630                                          Nitrite plus      45       1.300      0.076     0.638     1.170                      0.900            0.600     0.365      0.105
                                                 nitrate, wat.,                                                                                                             
                                                 unf., mg/L as                                                                                                              
                                                 nitrogen                                                                                                                   

  00613                                          Nitrite, wat.,    97       0.100      \--       0.008\*   \*0.030                    \*0.010          \*0.003   \*0.002    \*0.001
                                                 filt., mg/L as                                                                                                             
                                                 nitrogen                                                                                                                   

  00615                                          Nitrite, wat.,    45       0.120      \--       0.013\*   \*0.058                    \*0.010          \*0.008   \*0.003    \*0.001
                                                 unf., mg/L as                                                                                                              
                                                 nitrogen                                                                                                                   

  00605                                          Organic nitrogen, 92       2.000      0.130     0.476     1.335                      0.558            0.360     0.270      0.170
                                                 wat., unf., mg/L                                                                                                           

  00666                                          Phosphorus, wat., 90       0.370      \--       0.063\*   \*0.170                    \*0.090          \*0.040   \*0.020    \*0.008
                                                 filt., mg/L                                                                                                                

  00671                                          Orthophosphate,   122      0.750      \--       0.051\*   \*0.150                    \*0.053          \*0.030   \*0.010    \*0.004
                                                 wat., filt., mg/L                                                                                                          
                                                 as phosphorus                                                                                                              

  70507                                          Orthophosphate,   45       0.450      0.000     0.064     0.261                      0.075            0.040     0.020      0.000
                                                 wat., unf., mg/L                                                                                                           
                                                 as phosphorus                                                                                                              

  00665                                          Phosphorus, wat., 122      0.820      \--       0.092\*   \*0.320                    \*0.100          \*0.050   \*0.030    \*0.020
                                                 unf., mg/L                                                                                                                 

  00680                                          Organic carbon,   122      31.000     2.100     6.289     13.000                     7.500            5.000     3.650      2.815
                                                 wat., unf., mg/L                                                                                                           

  31501                                          Total coliform,   4        2100.000   380.000   \--       \--                        \--              \--       \--        \--
                                                 M-Endo MF method,                                                                                                          
                                                 immediate, wat.,                                                                                                           
                                                 colonies per 100                                                                                                           
                                                 milliliters                                                                                                                

  90901                                          Escherichia coli, 4        \--        \--       \--       \--                        \--              \--       \--        \--
                                                 MI MF method,                                                                                                              
                                                 wat., colonies                                                                                                             
                                                 per 100                                                                                                                    
                                                 milliliters                                                                                                                

  90902                                          Escherichia coli, 4        1300.000   36.000    \--       \--                        \--              \--       \--        \--
                                                 modified m-TEC MF                                                                                                          
                                                 method, wat.,                                                                                                              
                                                 colonies per 100                                                                                                           
                                                 milliliters                                                                                                                

  31633                                          Escherichia coli, 4        750.000    32.000    \--       \--                        \--              \--       \--        \--
                                                 m-TEC MF method,                                                                                                           
                                                 wat., colonies                                                                                                             
                                                 per 100                                                                                                                    
                                                 milliliters                                                                                                                

  90900                                          Total coliform,   4        1900.000   86.000    \--       \--                        \--              \--       \--        \--
                                                 MI MF method,                                                                                                              
                                                 wat., colonies                                                                                                             
                                                 per 100                                                                                                                    
                                                 milliliters                                                                                                                

  01105                                          Aluminum, wat.,   46       4080.000   10.000    331.726   1567.501                   260.000          127.000   67.500     18.960
                                                 unf.,                                                                                                                      
                                                 recoverable, ug/L                                                                                                          

  01002                                          Arsenic, wat.,    46       \--        \--       \--       \--                        \--              \--       \--        \--
                                                 unf., ug/L                                                                                                                 

  01027                                          Cadmium, wat.,    46       \--        \--       \--       \--                        \--              \--       \--        \--
                                                 unf., ug/L                                                                                                                 

  01034                                          Chromium, wat.,   46       65.000     \--       2.458\*   \*14.575                   \*1.000          \*0.334   \*0.092    \*0.015
                                                 unf.,                                                                                                                      
                                                 recoverable, ug/L                                                                                                          

  01037                                          Cobalt, wat.,     46       4.000      \--       0.668\*   \*2.650                    \*1.000          \*0.442   \*0.246    \*0.107
                                                 unf.,                                                                                                                      
                                                 recoverable, ug/L                                                                                                          

  01042                                          Copper, wat.,     45       14.000     \--       2.219\*   \*8.400                    \*2.000          \*2.000   \*0.950    \*0.412
                                                 unf.,                                                                                                                      
                                                 recoverable, ug/L                                                                                                          

  01045                                          Iron, wat., unf., 46       6510.000   163.000   966.804   3215.002                   952.500          745.000   517.500    273.500
                                                 recoverable, ug/L                                                                                                          

  01051                                          Lead, wat., unf., 46       10.000     \--       1.081\*   \*4.650                    \*1.000          \*0.598   \*0.306    \*0.109
                                                 recoverable, ug/L                                                                                                          

  01055                                          Manganese, wat.,  46       681.000    10.000    100.220   567.000                    102.500          40.000    23.150     10.000
                                                 unf.,                                                                                                                      
                                                 recoverable, ug/L                                                                                                          

  71900                                          Mercury, wat.,    46       \--        \--       \--       \--                        \--              \--       \--        \--
                                                 unf.,                                                                                                                      
                                                 recoverable, ug/L                                                                                                          

  01062                                          Molybdenum, wat., 46       \--        \--       \--       \--                        \--              \--       \--        \--
                                                 unf.,                                                                                                                      
                                                 recoverable, ug/L                                                                                                          

  01067                                          Nickel, wat.,     46       33.000     \--       1.305\*   \*3.300                    \*1.000          \*0.268   \*0.085    \*0.017
                                                 unf.,                                                                                                                      
                                                 recoverable, ug/L                                                                                                          

  01092                                          Zinc, wat., unf., 46       \--        \--       \--       \--                        \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                          

  80154                                          Suspended         122      1110.000   0.000     36.125    105.250                    17.800           7.000     4.000      2.000
                                                 sediment                                                                                                                   
                                                 concentration,                                                                                                             
                                                 mg/L                                                                                                                       

  **0209684980**[]{#__RefHeading___Toc50352710                                                                                                                              
  .anchor} **Cane Creek Reservoir at dam near                                                                                                                               
  White Cross (April 1989--August 2001)**                                                                                                                                   

  00080                                          Color, wat.,      58       120.000    1.000     36.034                     75.750    55.000           25.500    20.000     9.900
                                                 filt., platinum                                                                                                            
                                                 cobalt units                                                                                                               

  00078                                          Transparency,     37       1.750      0.350     1.046                      1.705     1.250            1.100     0.825      0.440
                                                 wat., unf.,                                                                                                                
                                                 Secchi disc,                                                                                                               
                                                 meters                                                                                                                     

  00300                                          Dissolved oxygen, 75       11.600     0.080     6.413                      9.908     8.600            7.200     4.630      0.248
                                                 wat., unf., mg/L                                                                                                           

  00301                                          Dissolved oxygen, 75       128.000    0.000     73.667                     114.000   103.000          84.000    49.000     2.000
                                                 wat., unf.,                                                                                                                
                                                 percent of                                                                                                                 
                                                 saturation                                                                                                                 

  00400                                          pH, wat., unf.,   76       9.200      5.820     7.117                      8.818     7.500            6.900     6.600      5.964
                                                 field, standard                                                                                                            
                                                 units                                                                                                                      

  00403                                          pH, wat., unf.,   59       9.200      6.500     7.431                      8.400     7.600            7.400     7.200      6.600
                                                 laboratory,                                                                                                                
                                                 standard units                                                                                                             

  00480                                          Salinity, wat.,   1        0.000      \--       \--                        \--       \--              \--       \--        \--
                                                 unf., parts per                                                                                                            
                                                 thousand                                                                                                                   

  90095                                          Specific          59       120.000    50.000    78.864                     102.000   83.000           77.000    72.000     65.000
                                                 conductance,                                                                                                               
                                                 wat., unf.,                                                                                                                
                                                 laboratory,                                                                                                                
                                                 microsiemens per                                                                                                           
                                                 centimeter at 25                                                                                                           
                                                 degrees Celsius                                                                                                            

  00095                                          Specific          76       163.000    42.000    81.392                     142.150   84.250           76.000    69.250     61.700
                                                 conductance,                                                                                                               
                                                 wat., unf.,                                                                                                                
                                                 microsiemens per                                                                                                           
                                                 centimeter at 25                                                                                                           
                                                 degrees Celsius                                                                                                            

  00900                                          Hardness, wat.,   59       40.000     15.000    24.407                     29.000    26.000           24.000    22.000     19.000
                                                 unf., mg/L as                                                                                                              
                                                 calcium carbonate                                                                                                          

  00915                                          Calcium, wat.,    59       9.600      3.600     5.914                      7.500     6.400            5.800     5.200      4.600
                                                 filt., mg/L                                                                                                                

  00925                                          Magnesium, wat.,  59       3.800      1.500     2.346                      2.700     2.500            2.400     2.100      1.800
                                                 filt., mg/L                                                                                                                

  00935                                          Potassium, wat.,  59       3.600      1.400     2.302                      3.200     2.700            2.200     1.900      1.700
                                                 filt., mg/L                                                                                                                

  00931                                          Sodium adsorption 59       0.400      0.200     0.331                      0.400     0.400            0.300     0.300      0.300
                                                 ratio, wat.,                                                                                                               
                                                 number                                                                                                                     

  00930                                          Sodium, wat.,     59       5.800      2.400     3.834                      5.300     4.100            3.900     3.500      2.400
                                                 filt., mg/L                                                                                                                

  00932                                          Sodium, wat.,     59       28.000     18.000    23.356                     27.000    25.000           23.000    22.000     18.000
                                                 percent in                                                                                                                 
                                                 equivalents of                                                                                                             
                                                 major cations                                                                                                              

  99430                                          Carbonate, wat.,  25       38.000     11.000    21.560                     36.200    24.500           20.000    18.500     11.600
                                                 unf., incremental                                                                                                          
                                                 titration, field,                                                                                                          
                                                 mg/L as calcium                                                                                                            
                                                 carbonate                                                                                                                  

  90410                                          Acid neutralizing 58       36.000     13.000    24.638                     33.050    28.000           24.500    21.000     17.950
                                                 capacity, wat.,                                                                                                            
                                                 unf., fixed                                                                                                                
                                                 endpoint (pH 4.5)                                                                                                          
                                                 titration,                                                                                                                 
                                                 laboratory, mg/L                                                                                                           
                                                 as calcium                                                                                                                 
                                                 carbonate                                                                                                                  

  39086                                          Alkalinity, wat., 1        26.000     \--       \--                        \--       \--              \--       \--        \--
                                                 filt.,                                                                                                                     
                                                 incremental                                                                                                                
                                                 titration, field,                                                                                                          
                                                 mg/L as calcium                                                                                                            
                                                 carbonate                                                                                                                  

  00410                                          Acid neutralizing 24       41.000     11.000    23.083                     38.750    26.500           22.500    19.250     11.500
                                                 capacity, wat.,                                                                                                            
                                                 unf., fixed                                                                                                                
                                                 endpoint (pH 4.5)                                                                                                          
                                                 titration, field,                                                                                                          
                                                 mg/L as calcium                                                                                                            
                                                 carbonate                                                                                                                  
  -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                           **Constituent name**           Sample   Maximum     Minimum   Mean       **Percentile**                                                      
  code**                                                                      size                                                                                                          
  -------------------------------------------- ------------------------------ -------- ----------- --------- ---------- ---------------- ---------- ---------- ------ ---------- ---------- ---------
                                                                                                                        95th                                   75th   50th       **25th**   **5th**

  00419                                        Acid neutralizing capacity,    9        31.000      17.000    22.111                      31.000     22.500            22.000     20.500     17.000
                                               wat., unf., incremental                                                                                                                      
                                               titration, field, mg/L as                                                                                                                    
                                               calcium carbonate                                                                                                                            

  99440                                        Bicarbonate, wat., unf.,       33       46.000      13.000    26.445                      41.100     28.500            26.000     23.000     15.100
                                               incremental titration, field,                                                                                                                
                                               mg/L                                                                                                                                         

  00453                                        Bicarbonate, wat., filt.,      1        32.000      \--       \--                         \--        \--               \--        \--        \--
                                               incremental titration, field,                                                                                                                
                                               mg/L                                                                                                                                         

  99445                                        Carbonate, wat., unf.,         10       0.000       \--       \--                         \--        \--               \--        \--        \--
                                               incremental titration, field,                                                                                                                
                                               mg/L                                                                                                                                         

  00452                                        Carbonate, wat., filt.,        1        0.000       \--       \--                         \--        \--               \--        \--        \--
                                               incremental titration, field,                                                                                                                
                                               mg/L                                                                                                                                         

  00940                                        Chloride, wat., filt., mg/L    58       6.900       3.700     5.009                       6.005      5.500             5.050      4.600      3.895

  00950                                        Fluoride, wat., filt., mg/L    58       0.200       \--       0.085\*                     \*0.200    \*0.100           \*0.076    \*0.054    \*0.035

  00955                                        Silica, wat., filt., mg/L      57       16.000      2.200     6.953                       13.100     7.550             6.700      5.550      3.220

  00945                                        Sulfate, wat., filt., mg/L     58       7.000       1.200     3.803                       5.515      4.350             3.900      3.000      1.785

  99890                                        Sulfate, wat., filt.,          3        \--         \--       \--                         \--        \--               \--        \--        \--
                                               uncorrected, mg/L                                                                                                                            

  70300                                        Residue on evaporation, dried  57       88.000      29.000    55.491                      75.500     60.000            54.000     50.000     38.000
                                               at 180 degrees Celsius, wat.,                                                                                                                
                                               filt., mg/L                                                                                                                                  

  00608                                        Ammonia, wat., filt., mg/L as  67       2.270       \--       0.137\*                     \*0.610    \*0.098           \*0.030    \*0.010    \*0.004
                                               nitrogen                                                                                                                                     

  00623                                        Ammonia plus organic nitrogen, 39       1.700       0.200     0.490                       1.100      0.600             0.400      0.300      0.200
                                               wat., filt., mg/L as nitrogen                                                                                                                

  00625                                        Ammonia plus organic nitrogen, 67       3.100       0.300     0.730                       1.480      0.800             0.600      0.500      0.400
                                               wat., unf., mg/L as nitrogen                                                                                                                 

  00610                                        Ammonia, wat., unf., mg/L as   19       0.660       \--       0.181\*                     \*0.660    \*0.540           \*0.060    \*0.010    \*0.002
                                               nitrogen                                                                                                                                     

  00620                                        Nitrate, wat., unf., mg/L as   2        0.410       0.280     \--                         \--        \--               \--        \--        \--
                                               nitrogen                                                                                                                                     

  00631                                        Nitrite plus nitrate, wat.,    67       1.700       \--       0.127\*                     \*0.486    \*0.160           \*0.020    \*0.005    \*0.001
                                               filt., mg/L as nitrogen                                                                                                                      

  00630                                        Nitrite plus nitrate, wat.,    19       1.700       \--       0.177\*                     \*1.700    \*0.200           \*0.024    \*0.006    \*0.001
                                               unf., mg/L as nitrogen                                                                                                                       

  00613                                        Nitrite, wat., filt., mg/L as  58       0.020       \--       0.004\*                     \*0.014    \*0.005           \*0.002    \*0.001    \*0.000
                                               nitrogen                                                                                                                                     

  00615                                        Nitrite, wat., unf., mg/L as   19       \--         \--       \--                         \--        \--               \--        \--        \--
                                               nitrogen                                                                                                                                     

  00605                                        Organic nitrogen, wat., unf.,  63       1.600       0.310     0.569                       0.924      0.640             0.500      0.420      0.362
                                               mg/L                                                                                                                                         

  00666                                        Phosphorus, wat., filt., mg/L  39       0.200       \--       0.016\*                     \*0.060    \*0.020           \*0.006    \*0.002    \*0.000

  00671                                        Orthophosphate, wat., filt.,   67       0.200       \--       0.012\*                     \*0.065    \*0.007           \*0.002    \*0.001    \*0.000
                                               mg/L as phosphorus                                                                                                                           

  70507                                        Orthophosphate, wat., unf.,    19       0.200       \--       0.017\*                     \*0.200    \*0.010           \*0.002    \*0.000    \*0.000
                                               mg/L as phosphorus                                                                                                                           

  00665                                        Phosphorus, wat., unf., mg/L   66       0.250       \--       0.039\*                     \*0.108    \*0.040           \*0.030    \*0.020    \*0.009

  00680                                        Organic carbon, wat., unf.,    59       49.000      2.900     8.498                       16.000     8.800             7.400      6.400      4.100
                                               mg/L                                                                                                                                         

  70953                                        Chlorophyll a, phytoplankton,  59       87.800      0.100     10.849                      37.300     11.000            7.800      3.500      0.800
                                               chromatographic-fluorometric                                                                                                                 
                                               method, ug/L                                                                                                                                 

  70954                                        Chlorophyll b, phytoplankton,  59       11.700      \--       0.540\*                     \*1.800    \*0.500           \*0.100    \*0.037    \*0.007
                                               chromatographic-fluorometric                                                                                                                 
                                               method, ug/L                                                                                                                                 

  01105                                        Aluminum, wat., unf.,          46       360.000     10.000    70.665                      252.500    83.325            50.000     30.000     18.245
                                               recoverable, ug/L                                                                                                                            

  01002                                        Arsenic, wat., unf., ug/L      46       \--         \--       \--                         \--        \--               \--        \--        \--

  01027                                        Cadmium, wat., unf., ug/L      46       \--         \--       \--                         \--        \--               \--        \--        \--

  01034                                        Chromium, wat., unf.,          46       8.400       \--       0.910\*                     \*3.930    \*1.000           \*0.567    \*0.296    \*0.117
                                               recoverable, ug/L                                                                                                                            

  01037                                        Cobalt, wat., unf.,            46       4.000       \--       0.681\*                     \*3.650    \*0.774           \*0.321    \*0.132    \*0.039
                                               recoverable, ug/L                                                                                                                            

  01042                                        Copper, wat., unf.,            45       400.000     \--       10.704\*                    \*8.800    \*2.000           \*2.000    \*0.769    \*0.249
                                               recoverable, ug/L                                                                                                                            

  01045                                        Iron, wat., unf., recoverable, 65       15400.000   68.400    1349.960                    9574.001   740.000           430.000    229.000    118.800
                                               ug/L                                                                                                                                         

  01051                                        Lead, wat., unf., recoverable, 46       3.000       \--       0.837\*                     \*2.000    \*1.000           \*0.655    \*0.417    \*0.204
                                               ug/L                                                                                                                                         

  01055                                        Manganese, wat., unf.,         65       5600.000    30.000    960.242    5195.000                    1200.000          290.000    82.700     30.000
                                               recoverable, ug/L                                                                                                                            

  71900                                        Mercury, wat., unf.,           46       \--         \--       \--        \--                         \--               \--        \--        \--
                                               recoverable, ug/L                                                                                                                            

  01062                                        Molybdenum, wat., unf.,        46       3.000       \--       0.494\*    \*2.000                     \*0.587           \*0.300    \*0.153    \*0.054
                                               recoverable, ug/L                                                                                                                            

  01067                                        Nickel, wat., unf.,            46       15.000      \--       1.634\*    \*9.200                     \*2.000           \*0.819    \*0.373    \*0.126
                                               recoverable, ug/L                                                                                                                            

  01147                                        Selenium, wat., unf., ug/L     46       \--         \--       \--        \--                         \--               \--        \--        \--

  01077                                        Silver, wat., unf.,            43       \--         \--       \--        \--                         \--               \--        \--        \--
                                               recoverable, ug/L                                                                                                                            

  01092                                        Zinc, wat., unf., recoverable, 46       70.000      \--       6.205\*    \*20.000                    \*6.707           \*2.714    \*1.095    \*0.313
                                               ug/L                                                                                                                                         

  **02096960**[]{#__RefHeading___Toc50352711                                                                                                                                                
  .anchor} **Haw River near Bynum (November                                                                                                                                                 
  1998--February 1998)**                                                                                                                                                                    

  00060                                        Discharge, cubic feet per      1        328.000     \--       \--        \--                         \--               \--        \--        \--
                                               second                                                                                                                                       

  00061                                        Discharge, instantaneous,      40       25000.000   55.000    4979.400   23430.002                   5550.000          2740.000   343.000    56.950
                                               cubic feet per second                                                                                                                        

  00080                                        Color, wat., filt., platinum   10       350.000     80.000    208.000    350.000                     242.500           220.000    147.500    80.000
                                               cobalt units                                                                                                                                 

  00300                                        Dissolved oxygen, wat., unf.,  35       14.200      3.000     9.474      14.200                      11.200            9.100      7.800      5.240
                                               mg/L                                                                                                                                         

  00301                                        Dissolved oxygen, wat., unf.,  16       120.000     68.000    99.250     120.000                     103.000           101.000    97.500     68.000
                                               percent of saturation                                                                                                                        

  00400                                        pH, wat., unf., field,         41       8.600       6.100     7.198      7.989                       7.500             7.200      6.950      6.200
                                               standard units                                                                                                                               

  00403                                        pH, wat., unf., laboratory,    10       7.700       6.800     7.310      7.700                       7.600             7.400      7.075      6.800
                                               standard units                                                                                                                               

  90095                                        Specific conductance, wat.,    10       369.000     66.000    120.100    369.000                     126.750           87.500     76.250     66.000
                                               unf., laboratory, microsiemens                                                                                                               
                                               per centimeter at 25 degrees                                                                                                                 
                                               Celsius                                                                                                                                      

  00095                                        Specific conductance, wat.,    41       524.000     64.000    170.488    508.800                     218.500           115.000    85.000     67.100
                                               unf., microsiemens per                                                                                                                       
                                               centimeter at 25 degrees                                                                                                                     
                                               Celsius                                                                                                                                      

  00900                                        Hardness, wat., unf., mg/L as  10       41.000      19.000    24.500     41.000                      27.000            23.000     19.750     19.000
                                               calcium carbonate                                                                                                                            

  00915                                        Calcium, wat., filt., mg/L     10       9.800       4.500     5.880      9.800                       6.400             5.550      4.775      4.500

  00925                                        Magnesium, wat., filt., mg/L   10       3.900       1.800     2.420      3.900                       2.625             2.250      2.000      1.800

  00935                                        Potassium, wat., filt., mg/L   10       6.200       1.400     2.870      6.200                       3.475             2.550      1.975      1.400

  00931                                        Sodium adsorption ratio, wat., 10       4.000       0.400     0.970      4.000                       1.000             0.600      0.475      0.400
                                               number                                                                                                                                       

  00930                                        Sodium, wat., filt., mg/L      10       54.000      3.600     12.000     54.000                      12.750            6.550      4.700      3.600

  00932                                        Sodium, wat., percent in       10       71.000      27.000    39.700     71.000                      46.750            35.000     30.750     27.000
                                               equivalents of major cations                                                                                                                 

  99430                                        Carbonate, wat., unf.,         5        33.000      13.000    \--        \--                         \--               \--        \--        \--
                                               incremental titration, field,                                                                                                                
                                               mg/L as calcium carbonate                                                                                                                    

  90410                                        Acid neutralizing capacity,    10       55.000      15.000    22.900     55.000                      22.750            20.000     16.750     15.000
                                               wat., unf., fixed endpoint (pH                                                                                                               
                                               4.5) titration, laboratory,                                                                                                                  
                                               mg/L as calcium carbonate                                                                                                                    

  00410                                        Acid neutralizing capacity,    4        33.000      20.000    \--        \--                         \--               \--        \--        \--
                                               wat., unf., fixed endpoint (pH                                                                                                               
                                               4.5) titration, field, mg/L as                                                                                                               
                                               calcium carbonate                                                                                                                            

  99440                                        Bicarbonate, wat., unf.,       5        40.000      16.000    \--        \--                         \--               \--        \--        \--
                                               incremental titration, field,                                                                                                                
                                               mg/L                                                                                                                                         

  00440                                        Bicarbonate, wat., unf., fixed 1        0.000       \--       \--        \--                         \--               \--        \--        \--
                                               endpoint (pH 4.5) titration,                                                                                                                 
                                               field, mg/L                                                                                                                                  
  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent     Sample   Maximum    Minimum    Mean       **Percentile**                                           
  code**                                         name**            size                                                                                               
  ---------------------------------------------- ----------------- -------- ---------- ---------- ---------- ---------------- ---------- ------ ---------- ---------- ----------
                                                                                                             95th                        75th   50th       **25th**   **5th**

  99445                                          Carbonate, wat.,  2        0.000      \--        \--        \--              \--               \--        \--        \--
                                                 unf., incremental                                                                                                    
                                                 titration, field,                                                                                                    
                                                 mg/L                                                                                                                 

  00940                                          Chloride, wat.,   10       41.000     3.600      10.290     41.000           10.600            6.350      4.125      3.600
                                                 filt., mg/L                                                                                                          

  00950                                          Fluoride, wat.,   10       0.400      \--        0.106\*    \*0.400          \*0.100           \*0.100    \*0.042    \*0.025
                                                 filt., mg/L                                                                                                          

  00955                                          Silica, wat.,     10       12.000     6.800      8.920      12.000           10.250            8.850      7.075      6.800
                                                 filt., mg/L                                                                                                          

  00945                                          Sulfate, wat.,    10       51.000     6.900      13.570     51.000           12.500            9.300      7.275      6.900
                                                 filt., mg/L                                                                                                          

  70300                                          Residue on        10       222.000    52.000     89.700     222.000          99.000            77.500     55.750     52.000
                                                 evaporation,                                                                                                         
                                                 dried at 180                                                                                                         
                                                 degrees Celsius,                                                                                                     
                                                 wat., filt., mg/L                                                                                                    

  00608                                          Ammonia, wat.,    5        0.210      0.010      \--        \--              \--               \--        \--        \--
                                                 filt., mg/L as                                                                                                       
                                                 nitrogen                                                                                                             

  00623                                          Ammonia plus      4        \--        \--        \--        \--              \--               \--        \--        \--
                                                 organic nitrogen,                                                                                                    
                                                 wat., filt., mg/L                                                                                                    
                                                 as nitrogen                                                                                                          

  00625                                          Ammonia plus      9        1.700      0.600      0.933      1.700            1.050             0.900      0.700      0.600
                                                 organic nitrogen,                                                                                                    
                                                 wat., unf., mg/L                                                                                                     
                                                 as nitrogen                                                                                                          

  00610                                          Ammonia, wat.,    4        0.130      0.050      \--        \--              \--               \--        \--        \--
                                                 unf., mg/L as                                                                                                        
                                                 nitrogen                                                                                                             

  00620                                          Nitrate, wat.,    3        1.980      0.410      \--        \--              \--               \--        \--        \--
                                                 unf., mg/L as                                                                                                        
                                                 nitrogen                                                                                                             

  00631                                          Nitrite plus      5        0.560      0.280      \--        \--              \--               \--        \--        \--
                                                 nitrate, wat.,                                                                                                       
                                                 filt., mg/L as                                                                                                       
                                                 nitrogen                                                                                                             

  00630                                          Nitrite plus      4        2.000      0.270      \--        \--              \--               \--        \--        \--
                                                 nitrate, wat.,                                                                                                       
                                                 unf., mg/L as                                                                                                        
                                                 nitrogen                                                                                                             

  00613                                          Nitrite, wat.,    5        \--        \--        \--        \--              \--               \--        \--        \--
                                                 filt., mg/L as                                                                                                       
                                                 nitrogen                                                                                                             

  00615                                          Nitrite, wat.,    4        \--        \--        \--        \--              \--               \--        \--        \--
                                                 unf., mg/L as                                                                                                        
                                                 nitrogen                                                                                                             

  00605                                          Organic nitrogen, 9        1.600      0.540      0.836      1.600            0.915             0.750      0.625      0.540
                                                 wat., unf., mg/L                                                                                                     

  00666                                          Phosphorus, wat., 4        0.110      0.030      \--        \--              \--               \--        \--        \--
                                                 filt., mg/L                                                                                                          

  00671                                          Orthophosphate,   5        0.120      0.040      \--        \--              \--               \--        \--        \--
                                                 wat., filt., mg/L                                                                                                    
                                                 as phosphorus                                                                                                        

  70507                                          Orthophosphate,   4        0.280      0.020      \--        \--              \--               \--        \--        \--
                                                 wat., unf., mg/L                                                                                                     
                                                 as phosphorus                                                                                                        

  00665                                          Phosphorus, wat., 9        0.580      0.070      0.229      0.580            0.255             0.200      0.150      0.070
                                                 unf., mg/L                                                                                                           

  00680                                          Organic carbon,   10       22.000     9.200      13.350     22.000           14.500            13.000     10.575     9.200
                                                 wat., unf., mg/L                                                                                                     

  01105                                          Aluminum, wat.,   10       5900.000   1000.000   2580.000   5900.000         3325.000          2000.000   1650.000   1000.000
                                                 unf.,                                                                                                                
                                                 recoverable, ug/L                                                                                                    

  01002                                          Arsenic, wat.,    10       \--        \--        \--        \--              \--               \--        \--        \--
                                                 unf., ug/L                                                                                                           

  01027                                          Cadmium, wat.,    10       \--        \--        \--        \--              \--               \--        \--        \--
                                                 unf., ug/L                                                                                                           

  01034                                          Chromium, wat.,   10       11.000     1.000      6.030      11.000           8.250             5.500      4.500      1.000
                                                 unf.,                                                                                                                
                                                 recoverable, ug/L                                                                                                    

  01037                                          Cobalt, wat.,     10       10.000     \--        3.477\*    \*10.000         \*4.000           \*3.000    \*1.750    \*0.770
                                                 unf.,                                                                                                                
                                                 recoverable, ug/L                                                                                                    

  01042                                          Copper, wat.,     10       32.000     5.000      16.200     32.000           24.500            13.500     8.500      5.000
                                                 unf.,                                                                                                                
                                                 recoverable, ug/L                                                                                                    

  01045                                          Iron, wat., unf., 10       9200.000   1700.000   3820.000   9200.000         4400.000          3350.000   2450.000   1700.000
                                                 recoverable, ug/L                                                                                                    

  01051                                          Lead, wat., unf., 10       59.000     5.000      23.700     59.000           39.000            13.500     10.000     5.000
                                                 recoverable, ug/L                                                                                                    

  01055                                          Manganese, wat.,  10       730.000    110.000    354.000    730.000          485.000           335.000    192.500    110.000
                                                 unf.,                                                                                                                
                                                 recoverable, ug/L                                                                                                    

  71900                                          Mercury, wat.,    10       \--        \--        \--        \--              \--               \--        \--        \--
                                                 unf.,                                                                                                                
                                                 recoverable, ug/L                                                                                                    

  01062                                          Molybdenum, wat., 10       \--        \--        \--        \--              \--               \--        \--        \--
                                                 unf.,                                                                                                                
                                                 recoverable, ug/L                                                                                                    

  01067                                          Nickel, wat.,     10       7.000      2.000      4.400      7.000            6.000             4.000      3.000      2.000
                                                 unf.,                                                                                                                
                                                 recoverable, ug/L                                                                                                    

  01147                                          Selenium, wat.,   10       \--        \--        \--        \--              \--               \--        \--        \--
                                                 unf., ug/L                                                                                                           

  01077                                          Silver, wat.,     10       \--        \--        \--        \--              \--               \--        \--        \--
                                                 unf.,                                                                                                                
                                                 recoverable, ug/L                                                                                                    

  01092                                          Zinc, wat., unf., 10       60.000     20.000     35.000     60.000           42.500            30.000     27.500     20.000
                                                 recoverable, ug/L                                                                                                    

  80154                                          Suspended         17       691.000    49.000     254.647    691.000          338.000           209.000    146.000    49.000
                                                 sediment                                                                                                             
                                                 concentration,                                                                                                       
                                                 mg/L                                                                                                                 

  **0209719700**[]{#__RefHeading___Toc50352712                                                                                                                        
  .anchor} **B.E. Jordan Lake, Haw River arm                                                                                                                          
  above B.E. Jordan dam (December 1988--August                                                                                                                        
  2001)**                                                                                                                                                             

  00080                                          Color, wat.,      42       130.000    15.000     35.310     76.700           43.500            30.000     22.250     15.000
                                                 filt., platinum                                                                                                      
                                                 cobalt units                                                                                                         

  00078                                          Transparency,     37       0.950      0.300      0.628      0.905            0.750             0.650      0.525      0.345
                                                 wat., unf.,                                                                                                          
                                                 Secchi disc,                                                                                                         
                                                 meters                                                                                                               

  00300                                          Dissolved oxygen, 64       14.200     0.300      8.581      13.225           10.600            8.635      7.100      2.027
                                                 wat., unf., mg/L                                                                                                     

  00301                                          Dissolved oxygen, 56       184.000    3.000      97.661     180.150          115.750           95.000     75.250     20.900
                                                 wat., unf.,                                                                                                          
                                                 percent of                                                                                                           
                                                 saturation                                                                                                           

  00400                                          pH, wat., unf.,   65       11.500     6.320      7.902      10.580           8.925             7.500      7.000      6.450
                                                 field, standard                                                                                                      
                                                 units                                                                                                                

  00403                                          pH, wat., unf.,   42       10.100     6.900      7.981      9.485            8.550             7.600      7.300      7.200
                                                 laboratory,                                                                                                          
                                                 standard units                                                                                                       

  90095                                          Specific          42       367.000    106.000    193.095    332.750          222.250           193.500    157.500    114.300
                                                 conductance,                                                                                                         
                                                 wat., unf.,                                                                                                          
                                                 laboratory,                                                                                                          
                                                 microsiemens per                                                                                                     
                                                 centimeter at 25                                                                                                     
                                                 degrees Celsius                                                                                                      

  00095                                          Specific          65       362.000    101.000    184.585    285.100          215.500           185.000    144.000    104.300
                                                 conductance,                                                                                                         
                                                 wat., unf.,                                                                                                          
                                                 microsiemens per                                                                                                     
                                                 centimeter at 25                                                                                                     
                                                 degrees Celsius                                                                                                      

  00900                                          Hardness, wat.,   42       42.000     25.000     31.167     38.550           33.250            31.000     29.000     25.000
                                                 unf., mg/L as                                                                                                        
                                                 calcium carbonate                                                                                                    

  00915                                          Calcium, wat.,    42       10.000     5.900      7.590      9.210            8.000             7.600      7.075      6.015
                                                 filt., mg/L                                                                                                          

  00925                                          Magnesium, wat.,  42       3.900      2.300      2.969      3.840            3.200             3.000      2.775      2.300
                                                 filt., mg/L                                                                                                          

  00935                                          Potassium, wat.,  42       6.700      2.200      3.788      5.710            4.225             3.700      3.100      2.400
                                                 filt., mg/L                                                                                                          

  00931                                          Sodium adsorption 42       4.000      0.800      1.745      3.850            2.000             2.000      1.000      0.900
                                                 ratio, wat.,                                                                                                         
                                                 number                                                                                                               

  00930                                          Sodium, wat.,     42       56.000     9.900      23.164     48.200           28.250            23.000     15.000     10.000
                                                 filt., mg/L                                                                                                          

  00932                                          Sodium, wat.,     42       72.000     42.000     56.190     70.400           62.000            58.500     51.000     42.150
                                                 percent in                                                                                                           
                                                 equivalents of                                                                                                       
                                                 major cations                                                                                                        

  99430                                          Carbonate, wat.,  22       54.000     24.000     35.500     53.700           38.750            34.500     29.750     24.000
                                                 unf., incremental                                                                                                    
                                                 titration, field,                                                                                                    
                                                 mg/L as calcium                                                                                                      
                                                 carbonate                                                                                                            

  90410                                          Acid neutralizing 42       56.000     24.000     37.024     52.100           41.250            37.500     32.000     25.150
                                                 capacity, wat.,                                                                                                      
                                                 unf., fixed                                                                                                          
                                                 endpoint (pH 4.5)                                                                                                    
                                                 titration,                                                                                                           
                                                 laboratory, mg/L                                                                                                     
                                                 as calcium                                                                                                           
                                                 carbonate                                                                                                            

  39086                                          Alkalinity, wat., 1        36.000     \--        \--        \--              \--               \--        \--        \--
                                                 filt.,                                                                                                               
                                                 incremental                                                                                                          
                                                 titration, field,                                                                                                    
                                                 mg/L as calcium                                                                                                      
                                                 carbonate                                                                                                            

  00410                                          Acid neutralizing 23       54.000     24.000     37.000     53.800           42.000            35.000     31.000     24.400
                                                 capacity, wat.,                                                                                                      
                                                 unf., fixed                                                                                                          
                                                 endpoint (pH 4.5)                                                                                                    
                                                 titration, field,                                                                                                    
                                                 mg/L as calcium                                                                                                      
                                                 carbonate                                                                                                            

  00419                                          Acid neutralizing 7        43.000     25.000     35.571     43.000           42.000            34.000     31.000     25.000
                                                 capacity, wat.,                                                                                                      
                                                 unf., incremental                                                                                                    
                                                 titration, field,                                                                                                    
                                                 mg/L as calcium                                                                                                      
                                                 carbonate                                                                                                            

  99440                                          Bicarbonate,      29       66.000     10.000     39.041     64.500           49.000            38.000     30.000     11.500
                                                 wat., unf.,                                                                                                          
                                                 incremental                                                                                                          
                                                 titration, field,                                                                                                    
                                                 mg/L                                                                                                                 

  00453                                          Bicarbonate,      1        44.000     \--        \--        \--              \--               \--        \--        \--
                                                 wat., filt.,                                                                                                         
                                                 incremental                                                                                                          
                                                 titration, field,                                                                                                    
                                                 mg/L                                                                                                                 

  99445                                          Carbonate, wat.,  12       16.000     0.000      4.500      16.000           9.750             1.500      0.000      0.000
                                                 unf., incremental                                                                                                    
                                                 titration, field,                                                                                                    
                                                 mg/L                                                                                                                 

  00452                                          Carbonate, wat.,  1        0.000      \--        \--        \--              \--               \--        \--        \--
                                                 filt.,                                                                                                               
                                                 incremental                                                                                                          
                                                 titration, field,                                                                                                    
                                                 mg/L                                                                                                                 

  00940                                          Chloride, wat.,   41       35.000     6.800      16.961     31.500           21.000            16.000     12.500     8.450
                                                 filt., mg/L                                                                                                          

  00950                                          Fluoride, wat.,   41       0.400      0.100      0.217      0.390            0.300             0.200      0.200      0.100
                                                 filt., mg/L                                                                                                          

  00955                                          Silica, wat.,     40       12.000     4.100      7.153      10.950           8.075             6.850      5.925      4.105
                                                 filt., mg/L                                                                                                          

  00945                                          Sulfate, wat.,    41       53.000     10.000     23.024     48.000           28.500            23.000     16.000     11.000
                                                 filt., mg/L                                                                                                          

  70300                                          Residue on        40       220.000    74.000     117.125    201.200          127.500           116.500    98.500     76.150
                                                 evaporation,                                                                                                         
                                                 dried at 180                                                                                                         
                                                 degrees Celsius,                                                                                                     
                                                 wat., filt., mg/L                                                                                                    

  00608                                          Ammonia, wat.,    49       0.427      \--        0.045\*    \*0.156          \*0.050           \*0.030    \*0.008    \*0.003
                                                 filt., mg/L as                                                                                                       
                                                 nitrogen                                                                                                             

  00623                                          Ammonia plus      21       1.100      0.300      0.519      1.070            0.700             0.400      0.400      0.300
                                                 organic nitrogen,                                                                                                    
                                                 wat., filt., mg/L                                                                                                    
                                                 as nitrogen                                                                                                          

  00625                                          Ammonia plus      49       2.000      0.200      0.814      1.400            0.900             0.700      0.600      0.450
                                                 organic nitrogen,                                                                                                    
                                                 wat., unf., mg/L                                                                                                     
                                                 as nitrogen                                                                                                          

  00610                                          Ammonia, wat.,    3        0.050      0.020      \--        \--              \--               \--        \--        \--
                                                 unf., mg/L as                                                                                                        
                                                 nitrogen                                                                                                             

  00620                                          Nitrate, wat.,    2        0.330      0.190      \--        \--              \--               \--        \--        \--
                                                 unf., mg/L as                                                                                                        
                                                 nitrogen                                                                                                             

  00631                                          Nitrite plus      49       1.500      \--        0.325\*    \*0.805          \*0.495           \*0.260    \*0.090    \*0.028
                                                 nitrate, wat.,                                                                                                       
                                                 filt., mg/L as                                                                                                       
                                                 nitrogen                                                                                                             

  00630                                          Nitrite plus      3        \--        \--        \--        \--              \--               \--        \--        \--
                                                 nitrate, wat.,                                                                                                       
                                                 unf., mg/L as                                                                                                        
                                                 nitrogen                                                                                                             

  00613                                          Nitrite, wat.,    49       0.040      \--        0.013\*    \*0.032          \*0.020           \*0.010    \*0.007    \*0.001
                                                 filt., mg/L as                                                                                                       
                                                 nitrogen                                                                                                             

  00615                                          Nitrite, wat.,    3        0.030      0.020      \--        \--              \--               \--        \--        \--
                                                 unf., mg/L as                                                                                                        
                                                 nitrogen                                                                                                             

  00605                                          Organic nitrogen, 43       2.000      0.330      0.796      1.460            0.920             0.750      0.570      0.394
                                                 wat., unf., mg/L                                                                                                     

  00666                                          Phosphorus, wat., 22       0.240      \--        0.033\*    \*0.215          \*0.040           \*0.020    \*0.009    \*0.003
                                                 filt., mg/L                                                                                                          

  00671                                          Orthophosphate,   49       0.220      \--        0.022\*    \*0.087          \*0.022           \*0.010    \*0.005    \*0.001
                                                 wat., filt., mg/L                                                                                                    
                                                 as phosphorus                                                                                                        

  70507                                          Orthophosphate,   3        \--        \--        \--        \--              \--               \--        \--        \--
                                                 wat., unf., mg/L                                                                                                     
                                                 as phosphorus                                                                                                        

  00665                                          Phosphorus, wat., 49       0.250      0.010      0.080      0.175            0.100             0.070      0.045      0.015
                                                 unf., mg/L                                                                                                           

  00680                                          Organic carbon,   39       14.000     6.500      8.651      14.000           9.600             8.200      7.300      6.600
                                                 wat., unf., mg/L                                                                                                     

  32213                                          Pheophytin a,     7        \--        \--        \--        \--              \--               \--        \--        \--
                                                 fluorometric                                                                                                         
                                                 method, ug/L                                                                                                         

  32209                                          Chlorophyll a,    7        54.000     6.000      25.429     54.000           54.000            21.000     7.000      6.000
                                                 fluorometric                                                                                                         
                                                 method,                                                                                                              
                                                 corrected, wat.,                                                                                                     
                                                 ug/L                                                                                                                 
  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum    Minimum              Mean       **Percentile**                                                                 
  code**                                                                        size                                                                                                                               
  ---------------------------------------------- ------------------------------ -------- ---------- --------- ---------- ---------- ---------------- ----------- ---------- ------ --------- ---------- ---------- ----------
                                                                                                                                    95th                                    75th             50th       **25th**   **5th**

  32217                                          Chlorophyll a, fluorometric    7        61.000     7.000                27.857     61.000                       54.000                      21.000     8.000      7.000
                                                 method, uncorrected, ug/L                                                                                                                                         

  70953                                          Chlorophyll a, phytoplankton,  42       61.400     1.100                16.171     43.905                       22.925                      12.100     7.075      1.450
                                                 chromatographic-fluorometric                                                                                                                                      
                                                 method, ug/L                                                                                                                                                      

  70954                                          Chlorophyll b, phytoplankton,  41       123.000    \--                  3.855\*    \*3.030                      \*1.200                     \*0.800    \*0.300    \*0.077
                                                 chromatographic-fluorometric                                                                                                                                      
                                                 method, ug/L                                                                                                                                                      

  01105                                          Aluminum, wat., unf.,          29       530.000    40.000               124.483    390.000                      158.000                     100.000    70.800     45.000
                                                 recoverable, ug/L                                                                                                                                                 

  01002                                          Arsenic, wat., unf., ug/L      29       2.000      \--                  0.701\*    \*1.500                      \*0.898                     \*0.634    \*0.491    \*0.305

  01025                                          Cadmium, wat., filt., ug/L     1        \--        \--                  \--        \--                          \--                         \--        \--        \--

  01027                                          Cadmium, wat., unf., ug/L      29       \--        \--                  \--        \--                          \--                         \--        \--        \--

  01034                                          Chromium, wat., unf.,          29       7.000      \--                  0.898\*    \*4.500                      \*0.995                     \*0.571    \*0.287    \*0.107
                                                 recoverable, ug/L                                                                                                                                                 

  01037                                          Cobalt, wat., unf.,            29       \--        \--                  \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01040                                          Copper, wat., filt., ug/L      1        1.000      \--                  \--        \--                          \--                         \--        \--        \--

  01042                                          Copper, wat., unf.,            29       6.000      1.000                2.414      5.500                        3.000                       2.000      2.000      1.000
                                                 recoverable, ug/L                                                                                                                                                 

  01045                                          Iron, wat., unf., recoverable, 46       2260.000   70.000               437.783    1536.501                     505.000                     314.500    190.000    93.500
                                                 ug/L                                                                                                                                                              

  01049                                          Lead, wat., filt., ug/L        1        \--        \--                  \--        \--                          \--                         \--        \--        \--

  01051                                          Lead, wat., unf., recoverable, 29       \--        \--                  \--        \--                          \--                         \--        \--        \--
                                                 ug/L                                                                                                                                                              

  01056                                          Manganese, wat., filt., ug/L   1        34.000     \--                  \--        \--                          \--                         \--        \--        \--

  01055                                          Manganese, wat., unf.,         46       1990.000   10.000               173.517    1643.501                     94.500                      60.000     39.875     20.000
                                                 recoverable, ug/L                                                                                                                                                 

  71900                                          Mercury, wat., unf.,           29       \--        \--                  \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01062                                          Molybdenum, wat., unf.,        29       4.000      \--                  1.903\*    \*4.000                      \*2.100                     \*2.000    \*0.998    \*0.567
                                                 recoverable, ug/L                                                                                                                                                 

  01147                                          Selenium, wat., unf., ug/L     29       \--        \--                  \--        \--                          \--                         \--        \--        \--

  01077                                          Silver, wat., unf.,            29       \--        \--                  \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01090                                          Zinc, wat., filt., ug/L        1        \--        \--                  \--        \--                          \--                         \--        \--        \--

  01092                                          Zinc, wat., unf., recoverable, 29       40.000     \--                  8.127\*    \*35.000                     \*9.700                     \*4.963    \*2.669    \*1.035
                                                 ug/L                                                                                                                                                              

  **02097314**[]{#__RefHeading___Toc50352713                                                                                                                                                                       
  .anchor} **New Hope Creek near Blands                                                                                                                                                                            
  (December 1988--March 2001)**                                                                                                                                                                                    

  00061                                          Discharge, instantaneous,      25       1900.000   7.000                134.192    1419.701                     66.000                      34.000     14.000     7.660
                                                 cubic feet per second                                                                                                                                             

  00080                                          Color, wat., filt., platinum   4        130.000    50.000               \--        \--                          \--                         \--        \--        \--
                                                 cobalt units                                                                                                                                                      

  00076                                          Turbidity, wat., unf.,         1        19.400     \--                  \--        \--                          \--                         \--        \--        \--
                                                 nephelometric turbidity units                                                                                                                                     

  00300                                          Dissolved oxygen, wat., unf.,  25       9.900      4.400                7.268      9.660                        8.400                       7.530      6.000      4.430
                                                 mg/L                                                                                                                                                              

  00301                                          Dissolved oxygen, wat., unf.,  8        87.000     67.000               77.500     87.000                       81.750                      79.500     72.000     67.000
                                                 percent of saturation                                                                                                                                             

  00400                                          pH, wat., unf., field,         24       8.980      6.120                7.025      8.560                        7.193                       7.035      6.815      6.202
                                                 standard units                                                                                                                                                    

  00403                                          pH, wat., unf., laboratory,    4        7.500      6.600                \--        \--                          \--                         \--        \--        \--
                                                 standard units                                                                                                                                                    

  90095                                          Specific conductance, wat.,    4        257.000    57.000               \--        \--                          \--                         \--        \--        \--
                                                 unf., laboratory, microsiemens                                                                                                                                    
                                                 per centimeter at 25 degrees                                                                                                                                      
                                                 Celsius                                                                                                                                                           

  00095                                          Specific conductance, wat.,    26       430.000    57.000               226.962    413.900                      318.500                     218.500    137.000    71.000
                                                 unf., microsiemens per                                                                                                                                            
                                                 centimeter at 25 degrees                                                                                                                                          
                                                 Celsius                                                                                                                                                           

  00900                                          Hardness, wat., unf., mg/L as  4        55.000     17.000               \--        \--                          \--                         \--        \--        \--
                                                 calcium carbonate                                                                                                                                                 

  00915                                          Calcium, wat., filt., mg/L     4        15.000     4.700                \--        \--                          \--                         \--        \--        \--

  00925                                          Magnesium, wat., filt., mg/L   4        4.400      1.400                \--        \--                          \--                         \--        \--        \--

  00935                                          Potassium, wat., filt., mg/L   4        5.000      2.000                \--        \--                          \--                         \--        \--        \--

  00931                                          Sodium adsorption ratio, wat., 4        1.000      0.300                \--        \--                          \--                         \--        \--        \--
                                                 number                                                                                                                                                            

  00930                                          Sodium, wat., filt., mg/L      4        25.000     2.700                \--        \--                          \--                         \--        \--        \--

  00932                                          Sodium, wat., percent in       4        47.000     23.000               \--        \--                          \--                         \--        \--        \--
                                                 equivalents of major cations                                                                                                                                      

  99430                                          Carbonate, wat., unf.,         1        37.000     \--                  \--        \--                          \--                         \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L as calcium carbonate                                                                                                                                         

  90410                                          Acid neutralizing capacity,    4        50.000     14.000               \--        \--                          \--                         \--        \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                                                                    
                                                 4.5) titration, laboratory,                                                                                                                                       
                                                 mg/L as calcium carbonate                                                                                                                                         

  00419                                          Acid neutralizing capacity,    1        44.000     \--                  \--        \--                          \--                         \--        \--        \--
                                                 wat., unf., incremental                                                                                                                                           
                                                 titration, field, mg/L as                                                                                                                                         
                                                 calcium carbonate                                                                                                                                                 

  99440                                          Bicarbonate, wat., unf.,       2        53.600     45.000               \--        \--                          \--                         \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  00940                                          Chloride, wat., filt., mg/L    4        25.000     2.500                \--        \--                          \--                         \--        \--        \--

  00950                                          Fluoride, wat., filt., mg/L    4        \--        \--                  \--        \--                          \--                         \--        \--        \--

  00955                                          Silica, wat., filt., mg/L      4        9.400      6.700                \--        \--                          \--                         \--        \--        \--

  00945                                          Sulfate, wat., filt., mg/L     4        21.000     5.900                \--        \--                          \--                         \--        \--        \--

  70300                                          Residue on evaporation, dried  4        162.000    92.000               \--        \--                          \--                         \--        \--        \--
                                                 at 180 degrees Celsius, wat.,                                                                                                                                     
                                                 filt., mg/L                                                                                                                                                       

  00608                                          Ammonia, wat., filt., mg/L as  3        0.151      0.009                \--        \--                          \--                         \--        \--        \--
                                                 nitrogen                                                                                                                                                          

  00625                                          Ammonia plus organic nitrogen, 3        1.000      0.600                \--        \--                          \--                         \--        \--        \--
                                                 wat., unf., mg/L as nitrogen                                                                                                                                      

  00631                                          Nitrite plus nitrate, wat.,    3        2.400      0.120                \--        \--                          \--                         \--        \--        \--
                                                 filt., mg/L as nitrogen                                                                                                                                           

  00613                                          Nitrite, wat., filt., mg/L as  3        0.017      0.004                \--        \--                          \--                         \--        \--        \--
                                                 nitrogen                                                                                                                                                          

  00605                                          Organic nitrogen, wat., unf.,  3        0.890      0.600                \--        \--                          \--                         \--        \--        \--
                                                 mg/L                                                                                                                                                              

  00671                                          Orthophosphate, wat., filt.,   3        0.110      0.051                \--        \--                          \--                         \--        \--        \--
                                                 mg/L as phosphorus                                                                                                                                                

  00665                                          Phosphorus, wat., unf., mg/L   3        0.220      0.110                \--        \--                          \--                         \--        \--        \--

  00680                                          Organic carbon, wat., unf.,    4        14.000     7.200                \--        \--                          \--                         \--        \--        \--
                                                 mg/L                                                                                                                                                              

  31501                                          Total coliform, M-Endo MF      4        2400.000   150.000              \--        \--                          \--                         \--        \--        \--
                                                 method, immediate, wat.,                                                                                                                                          
                                                 colonies per 100 milliliters                                                                                                                                      

  90901                                          Escherichia coli, MI MF        4        580.000    18.000               \--        \--                          \--                         \--        \--        \--
                                                 method, wat., colonies per 100                                                                                                                                    
                                                 milliliters                                                                                                                                                       

  90902                                          Escherichia coli, modified     4        580.000    16.000               \--        \--                          \--                         \--        \--        \--
                                                 m-TEC MF method, wat.,                                                                                                                                            
                                                 colonies per 100 milliliters                                                                                                                                      

  31633                                          Escherichia coli, m-TEC MF     5        680.000    19.000               \--        \--                          \--                         \--        \--        \--
                                                 method, wat., colonies per 100                                                                                                                                    
                                                 milliliters                                                                                                                                                       

  90900                                          Total coliform, MI MF method,  4        2000.000   190.000              \--        \--                          \--                         \--        \--        \--
                                                 wat., colonies per 100                                                                                                                                            
                                                 milliliters                                                                                                                                                       

  01105                                          Aluminum, wat., unf.,          4        2400.000   40.000               \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01002                                          Arsenic, wat., unf., ug/L      3        \--        \--                  \--        \--                          \--                         \--        \--        \--

  01027                                          Cadmium, wat., unf., ug/L      4        \--        \--                  \--        \--                          \--                         \--        \--        \--

  01034                                          Chromium, wat., unf.,          4        4.000      0.900                \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01037                                          Cobalt, wat., unf.,            4        \--        \--                  \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01042                                          Copper, wat., unf.,            4        11.000     2.000                \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01045                                          Iron, wat., unf., recoverable, 4        2800.000   682.000              \--        \--                          \--                         \--        \--        \--
                                                 ug/L                                                                                                                                                              

  01051                                          Lead, wat., unf., recoverable, 4        5.000      1.000                \--        \--                          \--                         \--        \--        \--
                                                 ug/L                                                                                                                                                              

  01055                                          Manganese, wat., unf.,         4        230.000    20.200               \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  71900                                          Mercury, wat., unf.,           4        \--        \--                  \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01062                                          Molybdenum, wat., unf.,        4        \--        \--                  \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01067                                          Nickel, wat., unf.,            4        4.000      2.000                \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01147                                          Selenium, wat., unf., ug/L     4        \--        \--                  \--        \--                          \--                         \--        \--        \--

  01077                                          Silver, wat., unf.,            4        \--        \--                  \--        \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01092                                          Zinc, wat., unf., recoverable, 4        90.200     20.000               \--        \--                          \--                         \--        \--        \--
                                                 ug/L                                                                                                                                                              

  80154                                          Suspended sediment             4        202.000    20.000               \--        \--                          \--                         \--        \--        \--
                                                 concentration, mg/L                                                                                                                                               

  **0209741955**[]{#__RefHeading___Toc50352714                                                                                                                                                                     
  .anchor} **Northeast Creek at SR 1100 near                                                                                                                                                                       
  Genlee (December 1988--March 2001)**                                                                                                                                                                             

  00060                                          Discharge, cubic feet per      3        15.000     8.000                \--        \--                          \--                         \--        \--        \--
                                                 second                                                                                                                                                            

  00061                                          Discharge, instantaneous,      27       901.000    4.100                176.800    832.600                      394.000                     26.000     7.900      4.460
                                                 cubic feet per second                                                                                                                                             

  00080                                          Color, wat., filt., platinum   13       400.000    40.000               175.385    400.000                      240.000                     150.000    100.000    40.000
                                                 cobalt units                                                                                                                                                      

  00300                                          Dissolved oxygen, wat., unf.,  29       11.400     4.700                7.012      11.100                       8.115                       6.400      5.600      4.815
                                                 mg/L                                                                                                                                                              

  00301                                          Dissolved oxygen, wat., unf.,  11       594.000    51.000               119.000    594.000                      90.000                      70.000     62.000     51.000
                                                 percent of saturation                                                                                                                                             

  00400                                          pH, wat., unf., field,         33       7.500      6.210                6.859      7.297                        7.000                       6.900      6.700      6.273
                                                 standard units                                                                                                                                                    

  00403                                          pH, wat., unf., laboratory,    13       7.600      6.600                7.085      7.600                        7.200                       7.100      6.900      6.600
                                                 standard units                                                                                                                                                    

  90095                                          Specific conductance, wat.,    13       578.000    52.000               192.231    578.000                      219.500                     140.000    91.000     52.000
                                                 unf., laboratory, microsiemens                                                                                                                                    
                                                 per centimeter at 25 degrees                                                                                                                                      
                                                 Celsius                                                                                                                                                           

  00095                                          Specific conductance, wat.,    32       714.000    50.000               290.466    646.400                      435.000                     234.000    133.500    53.900
                                                 unf., microsiemens per                                                                                                                                            
                                                 centimeter at 25 degrees                                                                                                                                          
                                                 Celsius                                                                                                                                                           

  00900                                          Hardness, wat., unf., mg/L as  13       77.000     16.000               38.231     77.000                       52.000                      34.000     25.000     16.000
                                                 calcium carbonate                                                                                                                                                 

  00915                                          Calcium, wat., filt., mg/L     13       21.000     4.100                10.008     21.000                       14.000                      8.900      6.500      4.100

  00925                                          Magnesium, wat., filt., mg/L   13       5.900      1.400                3.200      5.900                        4.150                       2.900      2.200      1.400

  00935                                          Potassium, wat., filt., mg/L   13       9.100      1.300                3.608      9.100                        4.350                       2.900      2.000      1.300

  00931                                          Sodium adsorption ratio, wat., 13       4.000      0.300                1.115      4.000                        1.000                       0.800      0.550      0.300
                                                 number                                                                                                                                                            

  00930                                          Sodium, wat., filt., mg/L      13       70.000     3.200                19.292     70.000                       22.000                      11.000     6.600      3.200

  00932                                          Sodium, wat., percent in       13       68.000     26.000               40.308     68.000                       45.500                      36.000     31.500     26.000
                                                 equivalents of major cations                                                                                                                                      

  99430                                          Carbonate, wat., unf.,         5        69.000     13.000               \--        \--                          \--                         \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L as calcium carbonate                                                                                                                                         

  90410                                          Acid neutralizing capacity,    13       46.000     13.000               29.462     46.000                       39.000                      31.000     21.000     13.000
                                                 wat., unf., fixed endpoint (pH                                                                                                                                    
                                                 4.5) titration, laboratory,                                                                                                                                       
                                                 mg/L as calcium carbonate                                                                                                                                         

  00410                                          Acid neutralizing capacity,    5        69.000     14.000               \--        \--                          \--                         \--        \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                                                                    
                                                 4.5) titration, field, mg/L as                                                                                                                                    
                                                 calcium carbonate                                                                                                                                                 

  00419                                          Acid neutralizing capacity,    2        40.000     21.000               \--        \--                          \--                         \--        \--        \--
                                                 wat., unf., incremental                                                                                                                                           
                                                 titration, field, mg/L as                                                                                                                                         
                                                 calcium carbonate                                                                                                                                                 

  99440                                          Bicarbonate, wat., unf.,       7        84.000     16.000               42.171     84.000                       56.000                      45.000     20.000     16.000
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  99445                                          Carbonate, wat., unf.,         5        0.000      \--                  \--        \--                          \--                         \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  00940                                          Chloride, wat., filt., mg/L    13       86.000     2.900                22.185     86.000                       26.500                      12.000     7.300      2.900

  00950                                          Fluoride, wat., filt., mg/L    13       0.900      \--                  0.269\*    \*0.900                      \*0.300                     \*0.200    \*0.100    \*0.043

  00955                                          Silica, wat., filt., mg/L      13       12.000     4.100                6.577      12.000                       6.950                       6.200      5.600      4.100

  00945                                          Sulfate, wat., filt., mg/L     13       46.000     5.000                16.854     46.000                       24.000                      11.000     8.450      5.000

  70300                                          Residue on evaporation, dried  13       344.000    40.000               129.462                     344.000     143.000                     101.000    77.500     40.000
                                                 at 180 degrees Celsius, wat.,                                                                                                                                     
                                                 filt., mg/L                                                                                                                                                       

  00608                                          Ammonia, wat., filt., mg/L as  8        0.284      0.019                0.132                       0.284       0.250                       0.090      0.047      0.019
                                                 nitrogen                                                                                                                                                          

  00623                                          Ammonia plus organic nitrogen, 5        0.700      0.300                \--                         \--         \--                         \--        \--        \--
                                                 wat., filt., mg/L as nitrogen                                                                                                                                     

  00625                                          Ammonia plus organic nitrogen, 12       1.600      0.600                0.875                       1.600       1.050                       0.800      0.600      0.600
                                                 wat., unf., mg/L as nitrogen                                                                                                                                      

  00610                                          Ammonia, wat., unf., mg/L as   4        0.150      0.020                \--                         \--         \--                         \--        \--        \--
                                                 nitrogen                                                                                                                                                          

  00620                                          Nitrate, wat., unf., mg/L as   4        1.280      0.540                \--                         \--         \--                         \--        \--        \--
                                                 nitrogen                                                                                                                                                          

  00631                                          Nitrite plus nitrate, wat.,    8        9.500      0.071                1.631                       9.500       1.185                       0.520      0.135      0.071
                                                 filt., mg/L as nitrogen                                                                                                                                           

  00630                                          Nitrite plus nitrate, wat.,    4        1.300      0.590                \--                         \--         \--                         \--        \--        \--
                                                 unf., mg/L as nitrogen                                                                                                                                            

  00613                                          Nitrite, wat., filt., mg/L as  8        0.065      \--                  0.020\*                     \*0.065     \*0.033                     \*0.010    \*0.008    \*0.005
                                                 nitrogen                                                                                                                                                          

  00615                                          Nitrite, wat., unf., mg/L as   4        0.050      0.020                \--                         \--         \--                         \--        \--        \--
                                                 nitrogen                                                                                                                                                          

  00605                                          Organic nitrogen, wat., unf.,  11       1.300      0.500                0.754                       1.300       0.860                       0.680      0.530      0.500
                                                 mg/L                                                                                                                                                              

  00666                                          Phosphorus, wat., filt., mg/L  5        0.170      0.030                \--                         \--         \--                         \--        \--        \--

  00671                                          Orthophosphate, wat., filt.,   8        1.500      0.030                0.247                       1.500       0.132                       0.062      0.032      0.030
                                                 mg/L as phosphorus                                                                                                                                                

  70507                                          Orthophosphate, wat., unf.,    4        0.180      0.040                \--                         \--         \--                         \--        \--        \--
                                                 mg/L as phosphorus                                                                                                                                                

  00665                                          Phosphorus, wat., unf., mg/L   12       1.800      0.110                0.316                       1.800       0.228                       0.180      0.125      0.110

  00680                                          Organic carbon, wat., unf.,    13       25.000     8.900                13.069                      25.000      14.500                      13.000     10.500     8.900
                                                 mg/L                                                                                                                                                              

  01105                                          Aluminum, wat., unf.,          13       2500.000   301.000              1664.692                    2500.000    2150.000                    1700.000   1310.000   301.000
                                                 recoverable, ug/L                                                                                                                                                 

  01002                                          Arsenic, wat., unf., ug/L      12       1.000      \--                  1.000\*                     \*1.000     \*1.000                     \*1.000    \*1.000    \*1.000

  01027                                          Cadmium, wat., unf., ug/L      13       \--        \--                  \--                         \--         \--                         \--        \--        \--

  01034                                          Chromium, wat., unf.,          13       11.000     \--                  3.997\*                     \*11.000    \*6.000                     \*3.300    \*1.900    \*0.659
                                                 recoverable, ug/L                                                                                                                                                 

  01037                                          Cobalt, wat., unf.,            13       2.000      \--                  1.429\*                     \*2.000     \*2.000                     \*1.134    \*0.948    \*0.710
                                                 recoverable, ug/L                                                                                                                                                 

  01042                                          Copper, wat., unf.,            13       13.000     4.000                10.000                      13.000      11.500                      11.000     8.500      4.000
                                                 recoverable, ug/L                                                                                                                                                 

  01045                                          Iron, wat., unf., recoverable, 13       2900.000   526.000              1929.538                    2900.000    2600.000                    2300.000   1174.000   526.000
                                                 ug/L                                                                                                                                                              

  01051                                          Lead, wat., unf., recoverable, 13       10.000     0.800                4.215                       10.000      5.500                       4.000      2.500      0.800
                                                 ug/L                                                                                                                                                              

  01055                                          Manganese, wat., unf.,         13       380.000    22.300               175.246                     380.000     295.000                     160.000    75.000     22.300
                                                 recoverable, ug/L                                                                                                                                                 

  71900                                          Mercury, wat., unf.,           13       \--        \--                  \--                         \--         \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01062                                          Molybdenum, wat., unf.,        13       21.000     \--                  5.761\*                     \*21.000    \*10.000                    \*2.000    \*0.887    \*0.306
                                                 recoverable, ug/L                                                                                                                                                 

  01067                                          Nickel, wat., unf.,            13       5.000      2.000                3.385                       5.000       4.000                       3.000      3.000      2.000
                                                 recoverable, ug/L                                                                                                                                                 

  01147                                          Selenium, wat., unf., ug/L     13       \--        \--                  \--                         \--         \--                         \--        \--        \--

  01077                                          Silver, wat., unf.,            13       \--        \--                  \--                         \--         \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01092                                          Zinc, wat., unf., recoverable, 13       144.000    \--                  44.412\*                    \*144.000   \*40.000                    \*30.000   \*26.678   \*20.000
                                                 ug/L                                                                                                                                                              

  80154                                          Suspended sediment             13       202.000    12.000               83.308                      202.000     118.000                     67.000     38.500     12.000
                                                 concentration, mg/L                                                                                                                                               

  **02097464**[]{#__RefHeading___Toc50352715                                                                                                                                                                       
  .anchor} **Morgan Creek near White Cross                                                                                                                                                                         
  (October 1988--August 2001)**                                                                                                                                                                                    

  00061                                          Discharge, instantaneous,      129      309.000    0.050     13.617                68.500                       6.950                       3.100      1.100      0.155
                                                 cubic feet per second                                                                                                                                             

  00080                                          Color, wat., filt., platinum   129      280.000    10.000    52.209                130.000                      58.000                      45.000     30.000     21.000
                                                 cobalt units                                                                                                                                                      

  00300                                          Dissolved oxygen, wat., unf.,  126      15.200     4.380     9.590                 14.190                       11.625                      9.800      7.775      5.300
                                                 mg/L                                                                                                                                                              

  00301                                          Dissolved oxygen, wat., unf.,  125      171.000    49.000    92.872                124.200                      104.000                     93.000     85.500     57.000
                                                 percent of saturation                                                                                                                                             

  00400                                          pH, wat., unf., field,         129      8.500      5.600     7.080                 7.620                        7.300                       7.150      6.890      6.285
                                                 standard units                                                                                                                                                    

  00403                                          pH, wat., unf., laboratory,    129      9.100      6.700     7.454                 8.100                        7.600                       7.400      7.200      7.000
                                                 standard units                                                                                                                                                    

  90095                                          Specific conductance, wat.,    129      222.000    37.000    107.550               154.000                      124.500                     105.000    87.000     69.000
                                                 unf., laboratory, microsiemens                                                                                                                                    
                                                 per centimeter at 25 degrees                                                                                                                                      
                                                 Celsius                                                                                                                                                           

  00095                                          Specific conductance, wat.,    128      222.000    36.000    104.773               152.000                      119.750                     103.000    83.250     71.450
                                                 unf., microsiemens per                                                                                                                                            
                                                 centimeter at 25 degrees                                                                                                                                          
                                                 Celsius                                                                                                                                                           

  00900                                          Hardness, wat., unf., mg/L as  129      61.000     10.000    34.403                49.500                       41.000                      34.000     27.500     21.500
                                                 calcium carbonate                                                                                                                                                 

  00915                                          Calcium, wat., filt., mg/L     129      15.000     2.400     8.586                 13.000                       10.000                      8.500      6.700      5.250

  00925                                          Magnesium, wat., filt., mg/L   129      5.700      1.000     3.143                 4.700                        3.800                       3.000      2.500      2.050

  00935                                          Potassium, wat., filt., mg/L   129      18.000     0.100     3.553                 8.950                        4.350                       2.700      1.600      1.200

  00931                                          Sodium adsorption ratio, wat., 129      0.500      0.200     0.385                 0.400                        0.400                       0.400      0.400      0.300
                                                 number                                                                                                                                                            

  00930                                          Sodium, wat., filt., mg/L      129      7.700      1.400     5.027                 6.350                        5.600                       5.000      4.600      3.550

  00932                                          Sodium, wat., percent in       128      28.000     15.000    22.562                28.000                       25.000                      23.000     20.000     18.000
                                                 equivalents of major cations                                                                                                                                      

  99430                                          Carbonate, wat., unf.,         52       69.000     6.000     33.865                60.800                       42.750                      31.500     24.250     12.200
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L as calcium carbonate                                                                                                                                         

  90410                                          Acid neutralizing capacity,    129      66.000     6.900     33.983                55.000                       41.500                      32.000     25.000     17.000
                                                 wat., unf., fixed endpoint (pH                                                                                                                                    
                                                 4.5) titration, laboratory,                                                                                                                                       
                                                 mg/L as calcium carbonate                                                                                                                                         

  39036                                          Alkalinity, wat., filt., fixed 1        31.000     \--       \--                   \--                          \--                         \--        \--        \--
                                                 endpoint (pH 4.5) titration,                                                                                                                                      
                                                 field, mg/L as calcium                                                                                                                                            
                                                 carbonate                                                                                                                                                         

  39086                                          Alkalinity, wat., filt.,       3        34.000     17.000    \--                   \--                          \--                         \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L as calcium carbonate                                                                                                                                         

  00410                                          Acid neutralizing capacity,    60       410.000    6.000     41.167                67.500                       45.000                      33.000     26.000     15.000
                                                 wat., unf., fixed endpoint (pH                                                                                                                                    
                                                 4.5) titration, field, mg/L as                                                                                                                                    
                                                 calcium carbonate                                                                                                                                                 

  00419                                          Acid neutralizing capacity,    16       68.000     12.000    33.438                68.000                       44.750                      30.500     23.500     12.000
                                                 wat., unf., incremental                                                                                                                                           
                                                 titration, field, mg/L as                                                                                                                                         
                                                 calcium carbonate                                                                                                                                                 

  99440                                          Bicarbonate, wat., unf.,       67       84.000     7.000     41.157                77.000                       53.000                      38.000     29.000     14.920
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  00453                                          Bicarbonate, wat., filt.,      3        41.000     20.000    \--                   \--                          \--                         \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  99445                                          Carbonate, wat., unf.,         12       0.000      \--       \--                   \--                          \--                         \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  00452                                          Carbonate, wat., filt.,        2        0.000      \--       \--                   \--                          \--                         \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  00940                                          Chloride, wat., filt., mg/L    123      17.000     2.800     6.537                 9.100                        7.300                       6.200      5.400      4.520

  00950                                          Fluoride, wat., filt., mg/L    123      0.400      \--       0.088\*               \*0.200                      \*0.100                     \*0.073    \*0.048    \*0.027

  00955                                          Silica, wat., filt., mg/L      122      21.000     1.200     13.332                19.000                       16.000                      14.000     11.000     7.215

  00945                                          Sulfate, wat., filt., mg/L     122      12.000     0.100     4.651                 8.740                        5.500                       4.100      3.275      2.600

  99890                                          Sulfate, wat., filt.,          7        \--        \--       \--                   \--                          \--                         \--        \--        \--
                                                 uncorrected, mg/L                                                                                                                                                 

  70300                                          Residue on evaporation, dried  123      158.000    1.000     74.463                111.400                      86.000                      72.000     60.000     46.000
                                                 at 180 degrees Celsius, wat.,                                                                                                                                     
                                                 filt., mg/L                                                                                                                                                       

  00608                                          Ammonia, wat., filt., mg/L as  128      1.500      \--       0.073\*               \*0.267                      \*0.057                     \*0.030    \*0.010    \*0.003
                                                 nitrogen                                                                                                                                                          

  00623                                          Ammonia plus organic nitrogen, 87       2.600      \--       0.479\*               \*1.600                      \*0.500                     \*0.300    \*0.200    \*0.099
                                                 wat., filt., mg/L as nitrogen                                                                                                                                     

  00625                                          Ammonia plus organic nitrogen, 129      3.300      \--       0.575\*               \*2.100                      \*0.600                     \*0.400    \*0.300    \*0.129
                                                 wat., unf., mg/L as nitrogen                                                                                                                                      

  00610                                          Ammonia, wat., unf., mg/L as   49       1.600      \--       0.140\*               \*1.236                      \*0.082                     \*0.030    \*0.020    \*0.002
                                                 nitrogen                                                                                                                                                          

  00620                                          Nitrate, wat., unf., mg/L as   32       1.680      0.320     0.831                 1.680                        1.100                       0.775      0.592      0.333
                                                 nitrogen                                                                                                                                                          

  00631                                          Nitrite plus nitrate, wat.,    128      1.700      0.005     0.688                 1.400                        0.900                       0.675      0.435      0.058
                                                 filt., mg/L as nitrogen                                                                                                                                           

  00630                                          Nitrite plus nitrate, wat.,    49       1.700      0.170     0.830                 1.600                        1.100                       0.800      0.510      0.265
                                                 unf., mg/L as nitrogen                                                                                                                                            

  00613                                          Nitrite, wat., filt., mg/L as  104      0.050      \--       0.010\*               \*0.039                      \*0.015                     \*0.006    \*0.003    \*0.001
                                                 nitrogen                                                                                                                                                          

  00615                                          Nitrite, wat., unf., mg/L as   49       0.100      \--       0.020\*               \*0.070                      \*0.030                     \*0.010    \*0.005    \*0.002
                                                 nitrogen                                                                                                                                                          

  00605                                          Organic nitrogen, wat., unf.,  112      2.000      0.110     0.517                 1.540                        0.585                       0.380      0.290      0.186
                                                 mg/L                                                                                                                                                              

  00666                                          Phosphorus, wat., filt., mg/L  92       0.970      0.020     0.204                 0.440                        0.300                       0.155      0.093      0.040

  00671                                          Orthophosphate, wat., filt.,   128      0.900      0.001     0.153                 0.410                        0.230                       0.105      0.051      0.017
                                                 mg/L as phosphorus                                                                                                                                                

  70507                                          Orthophosphate, wat., unf.,    49       0.900      0.030     0.226                 0.495                        0.350                       0.150      0.100      0.055
                                                 mg/L as phosphorus                                                                                                                                                

  00665                                          Phosphorus, wat., unf., mg/L   129      2.800      0.040     0.234                 0.575                        0.290                       0.150      0.090      0.045

  00680                                          Organic carbon, wat., unf.,    128      58.000     2.100     6.669                 14.550                       6.600                       4.800      4.000      3.045
                                                 mg/L                                                                                                                                                              

  01105                                          Aluminum, wat., unf.,          48       4400.000   20.000    388.906               2387.499                     238.250                     120.000    70.000     29.305
                                                 recoverable, ug/L                                                                                                                                                 

  01002                                          Arsenic, wat., unf., ug/L      48       2.000      \--       0.741\*               \*2.000                      \*1.000                     \*0.629    \*0.441    \*0.244

  01027                                          Cadmium, wat., unf., ug/L      48       \--        \--       \--                   \--                          \--                         \--        \--        \--

  01034                                          Chromium, wat., unf.,          48       11.000     \--       1.032\*               \*4.440                      \*1.150                     \*0.391    \*0.143    \*0.033
                                                 recoverable, ug/L                                                                                                                                                 

  01037                                          Cobalt, wat., unf.,            48       5.000      \--       0.772\*               \*3.550                      \*1.000                     \*0.494    \*0.281    \*0.120
                                                 recoverable, ug/L                                                                                                                                                 

  01042                                          Copper, wat., unf.,            48       10.000     \--       2.142\*               \*7.650                      \*3.000                     \*2.000    \*0.826    \*0.383
                                                 recoverable, ug/L                                                                                                                                                 

  01045                                          Iron, wat., unf., recoverable, 48       6700.000   220.000   1113.958              5035.498                     1095.000                    740.000    590.250    268.350
                                                 ug/L                                                                                                                                                              

  01051                                          Lead, wat., unf., recoverable, 47       20.000     \--       1.609\*               \*9.600                      \*2.000                     \*0.533    \*0.202    \*0.045
                                                 ug/L                                                                                                                                                              

  01055                                          Manganese, wat., unf.,         48       750.000    17.200    132.829               667.600                      142.000                     55.000     34.850     20.000
                                                 recoverable, ug/L                                                                                                                                                 

  71900                                          Mercury, wat., unf.,           47       \--        \--       \--                   \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01062                                          Molybdenum, wat., unf.,        48       3.000      \--       0.429\*               \*1.550                      \*0.499                     \*0.251    \*0.125    \*0.047
                                                 recoverable, ug/L                                                                                                                                                 

  01067                                          Nickel, wat., unf.,            48       5.000      \--       1.056\*               \*4.550                      \*1.000                     \*0.591    \*0.279    \*0.098
                                                 recoverable, ug/L                                                                                                                                                 

  01147                                          Selenium, wat., unf., ug/L     48       \--        \--       \--                   \--                          \--                         \--        \--        \--

  01077                                          Silver, wat., unf.,            47       \--        \--       \--                   \--                          \--                         \--        \--        \--
                                                 recoverable, ug/L                                                                                                                                                 

  01092                                          Zinc, wat., unf., recoverable, 48       269.000    \--       9.905\*               \*43.845                     \*3.929                     \*0.851    \*0.184    \*0.019
                                                 ug/L                                                                                                                                                              

  80154                                          Suspended sediment             113      603.000    0.000     25.640                72.390                       14.000                      7.000      4.000      2.000
                                                 concentration, mg/L                                                                                                                                               

  **0209749990**[]{#__RefHeading___Toc50352716                                                                                                                                                                     
  .anchor} **University Lake at the dam near                                                                                                                                                                       
  Chapel Hill (November 1988--August 2001)**                                                                                                                                                                       

  00080                                          Color, wat., filt., platinum   57       120.000    8.000                32.912                      75.000                        36.000    25.000     22.000     13.800
                                                 cobalt units                                                                                                                                                      

  00078                                          Transparency, wat., unf.,      36       1.450      0.250                0.693                       1.025                         0.887     0.675      0.512      0.335
                                                 Secchi disc, meters                                                                                                                                               

  00300                                          Dissolved oxygen, wat., unf.,  61       11.700     0.140                6.628                       10.400                        9.460     7.770      4.800      0.279
                                                 mg/L                                                                                                                                                              

  00301                                          Dissolved oxygen, wat., unf.,  60       133.000    2.000                76.783                      129.750                       105.000   87.000     56.250     3.000
                                                 percent of saturation                                                                                                                                             

  00400                                          pH, wat., unf., field,         73       8.600      5.970                7.157                       8.543                         7.290     7.060      6.825      6.082
                                                 standard units                                                                                                                                                    

  00403                                          pH, wat., unf., laboratory,    58       8.600      6.300                7.366                       8.010                         7.600     7.400      7.100      6.900
                                                 standard units                                                                                                                                                    

  90095                                          Specific conductance, wat.,    58       161.000    70.000               90.103                      118.600                       92.500    88.000     82.000     74.000
                                                 unf., laboratory, microsiemens                                                                                                                                    
                                                 per centimeter at 25 degrees                                                                                                                                      
                                                 Celsius                                                                                                                                                           

  00095                                          Specific conductance, wat.,    73       467.000    66.000               104.189                     247.500                       93.600    88.000     80.500     70.400
                                                 unf., microsiemens per                                                                                                                                            
                                                 centimeter at 25 degrees                                                                                                                                          
                                                 Celsius                                                                                                                                                           

  00900                                          Hardness, wat., unf., mg/L as  58       42.000     22.000               27.690                      34.000                        30.000    28.000     25.000     22.000
                                                 calcium carbonate                                                                                                                                                 

  00915                                          Calcium, wat., filt., mg/L     58       12.000     5.400                7.031                       8.710                         7.525     7.050      6.200      5.595

  00925                                          Magnesium, wat., filt., mg/L   58       2.900      2.000                2.469                       2.900                         2.700     2.500      2.200      2.000

  00935                                          Potassium, wat., filt., mg/L   58       3.500      1.300                2.284                       3.300                         2.800     2.200      1.800      1.400

  00931                                          Sodium adsorption ratio, wat., 58       0.500      0.300                0.419                       0.500                         0.500     0.400      0.400      0.300
                                                 number                                                                                                                                                            

  00930                                          Sodium, wat., filt., mg/L      58       6.400      3.200                5.052                       6.205                         5.625     5.000      4.500      3.585

  00932                                          Sodium, wat., percent in       58       31.000     18.000               26.500                      30.000                        29.000    27.000     24.000     20.950
                                                 equivalents of major cations                                                                                                                                      

  99430                                          Carbonate, wat., unf.,         24       47.000     19.000               28.000                      45.000                        35.000    26.000     22.000     19.000
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L as calcium carbonate                                                                                                                                         

  90410                                          Acid neutralizing capacity,    58       49.000     20.000               30.034                      39.050                        33.250    29.500     26.000     22.950
                                                 wat., unf., fixed endpoint (pH                                                                                                                                    
                                                 4.5) titration, laboratory,                                                                                                                                       
                                                 mg/L as calcium carbonate                                                                                                                                         

  00418                                          Alkalinity, wat., filt., fixed 1        30.000     \--                  \--                         \--                           \--       \--        \--        \--
                                                 endpoint (pH 4.5) titration,                                                                                                                                      
                                                 field, mg/L as calcium                                                                                                                                            
                                                 carbonate                                                                                                                                                         

  39086                                          Alkalinity, wat., filt.,       1        30.000     \--                  \--                         \--                           \--       \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L as calcium carbonate                                                                                                                                         

  00410                                          Acid neutralizing capacity,    25       47.000     19.000               29.320                      44.600                        35.000    29.000     23.000     19.000
                                                 wat., unf., fixed endpoint (pH                                                                                                                                    
                                                 4.5) titration, field, mg/L as                                                                                                                                    
                                                 calcium carbonate                                                                                                                                                 

  00419                                          Acid neutralizing capacity,    10       35.000     23.000               29.600                      35.000                        33.500    29.500     26.750     23.000
                                                 wat., unf., incremental                                                                                                                                           
                                                 titration, field, mg/L as                                                                                                                                         
                                                 calcium carbonate                                                                                                                                                 

  99440                                          Bicarbonate, wat., unf.,       34       57.000     23.000               33.703                      50.250                        38.250    32.500     27.000     23.000
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  00453                                          Bicarbonate, wat., filt.,      1        37.000     \--                  \--                         \--                           \--       \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  99445                                          Carbonate, wat., unf.,         9        7.000      0.000                0.778                       7.000                         0.000     0.000      0.000      0.000
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  00452                                          Carbonate, wat., filt.,        1        0.000      \--                  \--                         \--                           \--       \--        \--        \--
                                                 incremental titration, field,                                                                                                                                     
                                                 mg/L                                                                                                                                                              

  00940                                          Chloride, wat., filt., mg/L    57       6.800      3.800                5.104                       6.210                         5.400     5.100      4.600      4.080

  00950                                          Fluoride, wat., filt., mg/L    57       0.300      \--                  0.083\*                     \*0.200                       \*0.100   \*0.073    \*0.052    \*0.032

  00955                                          Silica, wat., filt., mg/L      56       20.000     4.200                12.864                      17.150                        15.000    13.000     11.000     5.765

  00945                                          Sulfate, wat., filt., mg/L     57       11.000     0.200                4.591                       7.100                         5.350     4.600      3.600      2.380

  99890                                          Sulfate, wat., filt.,          3        \--        \--                  \--                         \--                           \--       \--        \--        \--
                                                 uncorrected, mg/L                                                                                                                                                 

  70300                                          Residue on evaporation, dried  55       124.000    34.000               66.309                      97.600                        72.000    65.000     58.000     42.800
                                                 at 180 degrees Celsius, wat.,                                                                                                                                     
                                                 filt., mg/L                                                                                                                                                       

  00608                                          Ammonia, wat., filt., mg/L as  66       6.800      \--                  0.206\*                     \*1.108                       \*0.061   \*0.030    \*0.007    \*0.001
                                                 nitrogen                                                                                                                                                          

  00623                                          Ammonia plus organic nitrogen, 38       2.700      \--                  0.468\*                     \*1.085                       \*0.500   \*0.300    \*0.300    \*0.130
                                                 wat., filt., mg/L as nitrogen                                                                                                                                     

  00625                                          Ammonia plus organic nitrogen, 66       9.100      0.200                0.918                       2.795                         0.900     0.600      0.500      0.335
                                                 wat., unf., mg/L as nitrogen                                                                                                                                      

  00610                                          Ammonia, wat., unf., mg/L as   18       2.300      0.010                0.298                       2.300                         0.110     0.045      0.030      0.010
                                                 nitrogen                                                                                                                                                          

  00620                                          Nitrate, wat., unf., mg/L as   3        0.590      0.100                \--                         \--                           \--       \--        \--        \--
                                                 nitrogen                                                                                                                                                          

  00631                                          Nitrite plus nitrate, wat.,    66       0.470      \--                  0.033\*                     \*0.186                       \*0.015   \*0.005    \*0.001    \*0.000
                                                 filt., mg/L as nitrogen                                                                                                                                           

  00630                                          Nitrite plus nitrate, wat.,    18       0.600      \--                  0.092\*                     \*0.600                       \*0.100   \*0.042    \*0.017    \*0.007
                                                 unf., mg/L as nitrogen                                                                                                                                            

  00613                                          Nitrite, wat., filt., mg/L as  56       0.020      \--                  0.002\*                     \*0.010                       \*0.003   \*0.001    \*0.000    \*0.000
                                                 nitrogen                                                                                                                                                          

  00615                                          Nitrite, wat., unf., mg/L as   18       0.020      \--                  0.008\*                     \*0.020                       \*0.010   \*0.006    \*0.004    \*0.002
                                                 nitrogen                                                                                                                                                          

  00605                                          Organic nitrogen, wat., unf.,  53       2.700      0.270                0.685                       1.290                         0.775     0.590      0.495      0.367
                                                 mg/L                                                                                                                                                              

  00666                                          Phosphorus, wat., filt., mg/L  38       0.080      \--                  0.013\*                     \*0.053                       \*0.020   \*0.007    \*0.003    \*0.001

  00671                                          Orthophosphate, wat., filt.,   66       0.150      \--                  0.009\*                     \*0.060                       \*0.006   \*0.002    \*0.001    \*0.000
                                                 mg/L as phosphorus                                                                                                                                                

  70507                                          Orthophosphate, wat., unf.,    18       0.050      \--                  0.015\*                     \*0.050                       \*0.020   \*0.010    \*0.005    \*0.002
                                                 mg/L as phosphorus                                                                                                                                                

  00665                                          Phosphorus, wat., unf., mg/L   63       0.470      \--                  0.055\*                     \*0.116                       \*0.060   \*0.040    \*0.030    \*0.015

  00680                                          Organic carbon, wat., unf.,    58       15.000     4.800                7.874                       11.000                        8.950     7.450      6.575      5.200
                                                 mg/L                                                                                                                                                              
  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum     Minimum   Mean       **Percentile**                                                               
  code**                                                                        size                                                                                                                   
  ---------------------------------------------- ------------------------------ -------- ----------- --------- ---------- ---------------- ----------- --------- ------ --------- --------- ---------- ---------
                                                                                                                          95th                                   75th             50th      **25th**   **5th**

  70953                                          Chlorophyll a, phytoplankton,  52       165.000     1.200     18.437                      42.635                       24.050    11.050    6.700      1.920
                                                 chromatographic-fluorometric                                                                                                                          
                                                 method, ug/L                                                                                                                                          

  70954                                          Chlorophyll b, phytoplankton,  52       47.600      \--       1.662\*                     \*2.950                      \*1.275   \*0.500   \*0.150    \*0.045
                                                 chromatographic-fluorometric                                                                                                                          
                                                 method, ug/L                                                                                                                                          

  01105                                          Aluminum, wat., unf.,          45       240.000     10.000    51.971                      156.700                      66.000    40.000    27.600     10.000
                                                 recoverable, ug/L                                                                                                                                     

  01002                                          Arsenic, wat., unf., ug/L      45       \--         \--       \--                         \--                          \--       \--       \--        \--

  01027                                          Cadmium, wat., unf., ug/L      45       \--         \--       \--                         \--                          \--       \--       \--        \--

  01034                                          Chromium, wat., unf.,          45       4.000       \--       0.602\*                     \*2.700                      \*0.696   \*0.295   \*0.125    \*0.036
                                                 recoverable, ug/L                                                                                                                                     

  01037                                          Cobalt, wat., unf.,            45       2.000       \--       0.519\*                     \*1.000                      \*0.658   \*0.439   \*0.292    \*0.167
                                                 recoverable, ug/L                                                                                                                                     

  01042                                          Copper, wat., unf.,            32       95.000      \--       4.614\*                     \*48.850                     \*1.750   \*0.900   \*0.244    \*0.046
                                                 recoverable, ug/L                                                                                                                                     

  01045                                          Iron, wat., unf., recoverable, 63       49000.000   100.000   2058.873                    12679.995                    580.000   375.000   280.000    165.600
                                                 ug/L                                                                                                                                                  

  01051                                          Lead, wat., unf., recoverable, 33       3.000       \--       0.598\*                     \*2.300                      \*0.732   \*0.340   \*0.158    \*0.052
                                                 ug/L                                                                                                                                                  

  01055                                          Manganese, wat., unf.,         63       23000.000   50.000    1237.887                    7354.000                     520.000   160.000   94.100     60.000
                                                 recoverable, ug/L                                                                                                                                     

  71900                                          Mercury, wat., unf.,           45       \--         \--       \--                         \--                          \--       \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01062                                          Molybdenum, wat., unf.,        33       32.000      \--       1.251\*                     \*12.400                     \*0.188   \*0.026   \*0.004    \*0.000
                                                 recoverable, ug/L                                                                                                                                     

  01067                                          Nickel, wat., unf.,            32       2.000       \--       0.507\*                     \*2.000                      \*0.643   \*0.362   \*0.200    \*0.089
                                                 recoverable, ug/L                                                                                                                                     

  01147                                          Selenium, wat., unf., ug/L     45       \--         \--       \--                         \--                          \--       \--       \--        \--

  01077                                          Silver, wat., unf.,            44       \--         \--       \--                         \--                          \--       \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01092                                          Zinc, wat., unf., recoverable, 33       20.000      \--       4.707\*                     \*20.000                     \*6.093   \*3.087   \*1.562    \*0.617
                                                 ug/L                                                                                                                                                  

  **020927521**[]{#__RefHeading___Toc50352717                                                                                                                                                          
  .anchor} **Morgan Creek near Farrington                                                                                                                                                              
  (December 1988--April 1995)**                                                                                                                                                                        

  00061                                          Discharge, instantaneous,      16       296.000     13.000    39.250     296.000                      31.750                     20.000    15.250     13.000
                                                 cubic feet per second                                                                                                                                 

  00080                                          Color, wat., filt., platinum   1        120.000     \--       \--        \--                          \--                        \--       \--        \--
                                                 cobalt units                                                                                                                                          

  00300                                          Dissolved oxygen, wat., unf.,  16       10.900      5.500     7.091      10.900                       7.850                      6.400     6.125      5.500
                                                 mg/L                                                                                                                                                  

  00301                                          Dissolved oxygen, wat., unf.,  1        88.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 percent of saturation                                                                                                                                 

  00400                                          pH, wat., unf., field,         16       7.540       6.300     7.091      7.540                        7.267                      7.115     7.025      6.300
                                                 standard units                                                                                                                                        

  00403                                          pH, wat., unf., laboratory,    1        7.300       \--       \--        \--                          \--                        \--       \--        \--
                                                 standard units                                                                                                                                        

  90095                                          Specific conductance, wat.,    1        95.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 unf., laboratory, microsiemens                                                                                                                        
                                                 per centimeter at 25 degrees                                                                                                                          
                                                 Celsius                                                                                                                                               

  00095                                          Specific conductance, wat.,    16       411.000     75.000    246.938    411.000                      354.000                    244.500   151.250    75.000
                                                 unf., microsiemens per                                                                                                                                
                                                 centimeter at 25 degrees                                                                                                                              
                                                 Celsius                                                                                                                                               

  00900                                          Hardness, wat., unf., mg/L as  1        21.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 calcium carbonate                                                                                                                                     

  00915                                          Calcium, wat., filt., mg/L     1        5.400       \--       \--        \--                          \--                        \--       \--        \--

  00925                                          Magnesium, wat., filt., mg/L   1        1.800       \--       \--        \--                          \--                        \--       \--        \--

  00935                                          Potassium, wat., filt., mg/L   1        2.100       \--       \--        \--                          \--                        \--       \--        \--

  00931                                          Sodium adsorption ratio, wat., 1        0.800       \--       \--        \--                          \--                        \--       \--        \--
                                                 number                                                                                                                                                

  00930                                          Sodium, wat., filt., mg/L      1        8.400       \--       \--        \--                          \--                        \--       \--        \--

  00932                                          Sodium, wat., percent in       1        44.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 equivalents of major cations                                                                                                                          

  99430                                          Carbonate, wat., unf.,         1        14.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 incremental titration, field,                                                                                                                         
                                                 mg/L as calcium carbonate                                                                                                                             

  90410                                          Acid neutralizing capacity,    1        15.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                                                        
                                                 4.5) titration, laboratory,                                                                                                                           
                                                 mg/L as calcium carbonate                                                                                                                             

  00410                                          Acid neutralizing capacity,    1        14.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                                                        
                                                 4.5) titration, field, mg/L as                                                                                                                        
                                                 calcium carbonate                                                                                                                                     

  99440                                          Bicarbonate, wat., unf.,       1        17.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 incremental titration, field,                                                                                                                         
                                                 mg/L                                                                                                                                                  

  00940                                          Chloride, wat., filt., mg/L    1        7.300       \--       \--        \--                          \--                        \--       \--        \--

  00950                                          Fluoride, wat., filt., mg/L    1        \--         \--       \--        \--                          \--                        \--       \--        \--

  00955                                          Silica, wat., filt., mg/L      1        9.500       \--       \--        \--                          \--                        \--       \--        \--

  00945                                          Sulfate, wat., filt., mg/L     1        13.000      \--       \--        \--                          \--                        \--       \--        \--

  70300                                          Residue on evaporation, dried  1        76.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 at 180 degrees Celsius, wat.,                                                                                                                         
                                                 filt., mg/L                                                                                                                                           

  00608                                          Ammonia, wat., filt., mg/L as  1        0.090       \--       \--        \--                          \--                        \--       \--        \--
                                                 nitrogen                                                                                                                                              

  00623                                          Ammonia plus organic nitrogen, 1        0.400       \--       \--        \--                          \--                        \--       \--        \--
                                                 wat., filt., mg/L as nitrogen                                                                                                                         

  00625                                          Ammonia plus organic nitrogen, 1        0.600       \--       \--        \--                          \--                        \--       \--        \--
                                                 wat., unf., mg/L as nitrogen                                                                                                                          

  00631                                          Nitrite plus nitrate, wat.,    1        0.530       \--       \--        \--                          \--                        \--       \--        \--
                                                 filt., mg/L as nitrogen                                                                                                                               

  00613                                          Nitrite, wat., filt., mg/L as  1        0.040       \--       \--        \--                          \--                        \--       \--        \--
                                                 nitrogen                                                                                                                                              

  00605                                          Organic nitrogen, wat., unf.,  1        0.510       \--       \--        \--                          \--                        \--       \--        \--
                                                 mg/L                                                                                                                                                  

  00666                                          Phosphorus, wat., filt., mg/L  1        0.050       \--       \--        \--                          \--                        \--       \--        \--

  00671                                          Orthophosphate, wat., filt.,   1        0.040       \--       \--        \--                          \--                        \--       \--        \--
                                                 mg/L as phosphorus                                                                                                                                    

  00665                                          Phosphorus, wat., unf., mg/L   1        0.140       \--       \--        \--                          \--                        \--       \--        \--

  00680                                          Organic carbon, wat., unf.,    1        10.000      \--       \--        \--                          \--                        \--       \--        \--
                                                 mg/L                                                                                                                                                  

  01105                                          Aluminum, wat., unf.,          1        940.000     \--       \--        \--                          \--                        \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01002                                          Arsenic, wat., unf., ug/L      1        \--         \--       \--        \--                          \--                        \--       \--        \--

  01027                                          Cadmium, wat., unf., ug/L      1        \--         \--       \--        \--                          \--                        \--       \--        \--

  01034                                          Chromium, wat., unf.,          1        2.000       \--       \--        \--                          \--                        \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01037                                          Cobalt, wat., unf.,            1        \--         \--       \--        \--                          \--                        \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01042                                          Copper, wat., unf.,            1        4.000       \--       \--        \--                          \--                        \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01045                                          Iron, wat., unf., recoverable, 1        1400.000    \--       \--        \--                          \--                        \--       \--        \--
                                                 ug/L                                                                                                                                                  

  01051                                          Lead, wat., unf., recoverable, 1        3.000       \--       \--        \--                          \--                        \--       \--        \--
                                                 ug/L                                                                                                                                                  

  01055                                          Manganese, wat., unf.,         1        210.000     \--       \--        \--                          \--                        \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  71900                                          Mercury, wat., unf.,           1        \--         \--       \--        \--                          \--                        \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01062                                          Molybdenum, wat., unf.,        1        \--         \--       \--        \--                          \--                        \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01067                                          Nickel, wat., unf.,            1        1.000       \--       \--        \--                          \--                        \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01147                                          Selenium, wat., unf., ug/L     1        \--         \--       \--        \--                          \--                        \--       \--        \--

  01077                                          Silver, wat., unf.,            1        \--         \--       \--        \--                          \--                        \--       \--        \--
                                                 recoverable, ug/L                                                                                                                                     

  01092                                          Zinc, wat., unf., recoverable, 1        \--         \--       \--        \--                          \--                        \--       \--        \--
                                                 ug/L                                                                                                                                                  

  80154                                          Suspended sediment             1        102.000     \--       \--        \--                          \--                        \--       \--        \--
                                                 concentration, mg/L                                                                                                                                   

  **0209768310**[]{#__RefHeading___Toc50352718                                                                                                                                                         
  .anchor} **Jordan Lake at buoy 12 at                                                                                                                                                                 
  Farrington (August 1992--August 2001)**                                                                                                                                                              

  00080                                          Color, wat., filt., platinum   38       100.000     1.000     41.368     90.500                       53.500                     39.000    22.750     7.650
                                                 cobalt units                                                                                                                                          

  00078                                          Transparency, wat., unf.,      37       0.800       0.200     0.426      0.710                        0.450                      0.400     0.350      0.245
                                                 Secchi disc, meters                                                                                                                                   

  00300                                          Dissolved oxygen, wat., unf.,  52       13.500      0.400     7.653      12.475                       9.623                      7.905     6.555      1.886
                                                 mg/L                                                                                                                                                  

  00301                                          Dissolved oxygen, wat., unf.,  52       143.000     4.000     88.404     138.700                      107.500                    91.500    76.750     20.650
                                                 percent of saturation                                                                                                                                 

  00400                                          pH, wat., unf., field,         52       9.100       6.440     7.515      9.000                        8.100                      7.300     6.855      6.507
                                                 standard units                                                                                                                                        

  00403                                          pH, wat., unf., laboratory,    37       8.900       6.700     7.695      8.900                        8.100                      7.600     7.250      6.700
                                                 standard units                                                                                                                                        

  90095                                          Specific conductance, wat.,    37       204.000     79.000    145.676    190.500                      163.500                    149.000   128.000    79.000
                                                 unf., laboratory, microsiemens                                                                                                                        
                                                 per centimeter at 25 degrees                                                                                                                          
                                                 Celsius                                                                                                                                               

  00095                                          Specific conductance, wat.,    52       202.000     74.000    147.558    182.400                      164.750                    154.000   132.250    91.000
                                                 unf., microsiemens per                                                                                                                                
                                                 centimeter at 25 degrees                                                                                                                              
                                                 Celsius                                                                                                                                               

  00900                                          Hardness, wat., unf., mg/L as  37       37.000      20.000    30.405     36.100                       33.000                     31.000    28.500     20.000
                                                 calcium carbonate                                                                                                                                     

  00915                                          Calcium, wat., filt., mg/L     37       9.600       5.200     7.862      9.420                        8.500                      8.000     7.300      5.290

  00925                                          Magnesium, wat., filt., mg/L   37       3.100       1.700     2.619      3.100                        2.800                      2.700     2.450      1.790

  00935                                          Potassium, wat., filt., mg/L   37       4.000       1.700     3.008      4.000                        3.300                      3.100     2.600      2.150

  00931                                          Sodium adsorption ratio, wat., 37       2.000       0.500     0.968      1.100                        1.000                      1.000     0.900      0.590
                                                 number                                                                                                                                                

  00930                                          Sodium, wat., filt., mg/L      37       23.000      5.100     14.097     20.300                       17.000                     14.000    12.000     5.820

  00932                                          Sodium, wat., percent in       37       55.000      32.000    46.216     52.300                       51.000                     47.000    43.000     35.600
                                                 equivalents of major cations                                                                                                                          

  99430                                          Carbonate, wat., unf.,         22       77.000      16.000    31.773     71.600                       33.000                     32.000    26.750     16.450
                                                 incremental titration, field,                                                                                                                         
                                                 mg/L as calcium carbonate                                                                                                                             

  90410                                          Acid neutralizing capacity,    37       43.000      19.000    31.757     41.200                       36.000                     33.000    27.500     19.000
                                                 wat., unf., fixed endpoint (pH                                                                                                                        
                                                 4.5) titration, laboratory,                                                                                                                           
                                                 mg/L as calcium carbonate                                                                                                                             

  00410                                          Acid neutralizing capacity,    24       77.000      16.000    31.958     68.000                       33.750                     32.000    27.000     16.000
                                                 wat., unf., fixed endpoint (pH                                                                                                                        
                                                 4.5) titration, field, mg/L as                                                                                                                        
                                                 calcium carbonate                                                                                                                                     

  00419                                          Acid neutralizing capacity,    7        48.000      16.000    33.000     48.000                       45.000                     33.000    23.000     16.000
                                                 wat., unf., incremental                                                                                                                               
                                                 titration, field, mg/L as                                                                                                                             
                                                 calcium carbonate                                                                                                                                     

  99440                                          Bicarbonate, wat., unf.,       29       92.000      16.000    36.428     73.000                       40.000                     34.000    28.500     17.500
                                                 incremental titration, field,                                                                                                                         
                                                 mg/L                                                                                                                                                  
  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  -----------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS        **Constituent name**           Sample   Maximum    Minimum   Mean      **Percentile**                                         
  Param-eter\                                  size                                                                                           
  code**                                                                                                                                      
  ------------- ------------------------------ -------- ---------- --------- --------- ---------------- --------- ------ --------- ---------- ---------
                                                                                       95th                       75th   50th      **25th**   **5th**

  99445         Carbonate, wat., unf.,         14       9.000      0.000     2.500     9.000            5.000            1.000     0.000      0.000
                incremental titration, field,                                                                                                 
                mg/L                                                                                                                          

  00452         Carbonate, wat., filt.,        1        0.000      \--       \--       \--              \--              \--       \--        \--
                incremental titration, field,                                                                                                 
                mg/L                                                                                                                          

  00940         Chloride, wat., filt., mg/L    36       22.000     4.500     13.514    20.300           16.750           13.000    11.000     5.435

  00950         Fluoride, wat., filt., mg/L    36       0.300      0.100     0.219     0.300            0.300            0.200     0.200      0.100

  00955         Silica, wat., filt., mg/L      35       7.500      0.900     4.200     7.100            5.500            4.000     3.000      1.140

  00945         Sulfate, wat., filt., mg/L     36       22.000     6.900     13.128    20.300           15.750           13.000    11.000     7.325

  70300         Residue on evaporation, dried  35       121.000    60.000    91.000    117.000          100.000          92.000    81.000     62.400
                at 180 degrees Celsius, wat.,                                                                                                 
                filt., mg/L                                                                                                                   

  00608         Ammonia, wat., filt., mg/L as  45       0.336      \--       0.050\*   \*0.238          \*0.061          \*0.020   \*0.007    \*0.002
                nitrogen                                                                                                                      

  00623         Ammonia plus organic nitrogen, 18       1.000      \--       0.483\*   \*1.000          \*0.525          \*0.400   \*0.375    \*0.203
                wat., filt., mg/L as nitrogen                                                                                                 

  00625         Ammonia plus organic nitrogen, 45       3.400      0.300     0.907     1.270            1.000            0.900     0.750      0.400
                wat., unf., mg/L as nitrogen                                                                                                  

  00631         Nitrite plus nitrate, wat.,    45       0.350      \--       0.052\*   \*0.215          \*0.092          \*0.012   \*0.005    \*0.001
                filt., mg/L as nitrogen                                                                                                       

  00613         Nitrite, wat., filt., mg/L as  45       0.031      \--       0.006\*   \*0.030          \*0.008          \*0.004   \*0.001    \*0.000
                nitrogen                                                                                                                      

  00605         Organic nitrogen, wat., unf.,  40       3.400      0.260     0.840     1.295            0.935            0.780     0.642      0.312
                mg/L                                                                                                                          

  00666         Phosphorus, wat., filt., mg/L  18       0.040      \--       0.009\*   \*0.040          \*0.010          \*0.005   \*0.002    \*0.001

  00671         Orthophosphate, wat., filt.,   45       0.022      \--       0.004\*   \*0.017          \*0.004          \*0.003   \*0.002    \*0.001
                mg/L as phosphorus                                                                                                            

  00665         Phosphorus, wat., unf., mg/L   45       0.300      0.010     0.066     0.107            0.080            0.060     0.040      0.013

  00680         Organic carbon, wat., unf.,    37       80.000     8.000     12.249    20.600           11.000           11.000    9.450      8.000
                mg/L                                                                                                                          

  70953         Chlorophyll a, phytoplankton,  37       63.700     0.900     23.370    60.640           29.700           21.900    10.300     1.170
                chromatographic-fluorometric                                                                                                  
                method, ug/L                                                                                                                  

  70954         Chlorophyll b, phytoplankton,  37       4.300      \--       1.658\*   \*4.120          \*2.100          \*1.400   \*1.000    \*0.246
                chromatographic-fluorometric                                                                                                  
                method, ug/L                                                                                                                  

  01105         Aluminum, wat., unf.,          24       555.000    51.000    199.667   518.750          219.750          175.000   110.000    53.250
                recoverable, ug/L                                                                                                             

  01002         Arsenic, wat., unf., ug/L      24       \--        \--       \--       \--              \--              \--       \--        \--

  01027         Cadmium, wat., unf., ug/L      24       \--        \--       \--       \--              \--              \--       \--        \--

  01034         Chromium, wat., unf.,          24       \--        \--       \--       \--              \--              \--       \--        \--
                recoverable, ug/L                                                                                                             

  01037         Cobalt, wat., unf.,            24       \--        \--       \--       \--              \--              \--       \--        \--
                recoverable, ug/L                                                                                                             

  01042         Copper, wat., unf.,            24       2.000      \--       1.439\*   \*2.000          \*2.000          \*1.101   \*1.000    \*0.717
                recoverable, ug/L                                                                                                             

  01045         Iron, wat., unf., recoverable, 38       1090.000   130.000   443.368   1023.500         562.500          390.000   275.500    139.500
                ug/L                                                                                                                          

  01051         Lead, wat., unf., recoverable, 24       1.000      \--       0.922\*   \*1.000          \*0.954          \*0.917   \*0.887    \*0.838
                ug/L                                                                                                                          
  -----------------------------------------------------------------------------------------------------------------------------------------------------

  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent     Sample   Maximum   Minimum   Mean      **Percentile**                                         
  code**                                         name**            size                                                                                          
  ---------------------------------------------- ----------------- -------- --------- --------- --------- ---------------- --------- ------ --------- ---------- ---------
                                                                                                          95th                       75th   50th      **25th**   **5th**

  01055                                          Manganese, wat.,  38       807.000   60.000    207.895   674.000          235.000          180.000   122.250    88.500
                                                 unf.,                                                                                                           
                                                 recoverable, ug/L                                                                                               

  71900                                          Mercury, wat.,    24       \--       \--       \--       \--              \--              \--       \--        \--
                                                 unf.,                                                                                                           
                                                 recoverable, ug/L                                                                                               

  01062                                          Molybdenum, wat., 24       3.000     \--       1.530\*   \*2.950          \*2.000          \*1.350   \*0.969    \*0.565
                                                 unf.,                                                                                                           
                                                 recoverable, ug/L                                                                                               

  01067                                          Nickel, wat.,     24       3.000     \--       1.109\*   \*3.000          \*1.750          \*0.992   \*0.514    \*0.268
                                                 unf.,                                                                                                           
                                                 recoverable, ug/L                                                                                               

  01147                                          Selenium, wat.,   24       \--       \--       \--       \--              \--              \--       \--        \--
                                                 unf., ug/L                                                                                                      

  01077                                          Silver, wat.,     24       \--       \--       \--       \--              \--              \--       \--        \--
                                                 unf.,                                                                                                           
                                                 recoverable, ug/L                                                                                               

  01092                                          Zinc, wat., unf., 24       \--       \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                               

  **0209771550**[]{#__RefHeading___Toc50352719                                                                                                                   
  .anchor} **Jordan Lake at buoy 9 near                                                                                                                          
  Farrington (December 1988--June 1992)**                                                                                                                        

  00080                                          Color, wat.,      5        42.000    14.000    \--       \--              \--              \--       \--        \--
                                                 filt., platinum                                                                                                 
                                                 cobalt units                                                                                                    

  00300                                          Dissolved oxygen, 13       12.500    7.400     9.991     12.500           11.600           10.100    8.140      7.400
                                                 wat., unf., mg/L                                                                                                

  00301                                          Dissolved oxygen, 5        130.000   86.000    \--       \--              \--              \--       \--        \--
                                                 wat., unf.,                                                                                                     
                                                 percent of                                                                                                      
                                                 saturation                                                                                                      

  00400                                          pH, wat., unf.,   14       8.900     6.520     7.666     8.900            8.520            7.365     6.890      6.520
                                                 field, standard                                                                                                 
                                                 units                                                                                                           

  00403                                          pH, wat., unf.,   5        8.300     7.100     \--       \--              \--              \--       \--        \--
                                                 laboratory,                                                                                                     
                                                 standard units                                                                                                  

  90095                                          Specific          5        153.000   134.000   \--       \--              \--              \--       \--        \--
                                                 conductance,                                                                                                    
                                                 wat., unf.,                                                                                                     
                                                 laboratory,                                                                                                     
                                                 microsiemens per                                                                                                
                                                 centimeter at 25                                                                                                
                                                 degrees Celsius                                                                                                 

  00095                                          Specific          14       180.000   96.000    130.143   180.000          146.500          131.500   108.250    96.000
                                                 conductance,                                                                                                    
                                                 wat., unf.,                                                                                                     
                                                 microsiemens per                                                                                                
                                                 centimeter at 25                                                                                                
                                                 degrees Celsius                                                                                                 

  00900                                          Hardness, wat.,   5        31.000    28.000    \--       \--              \--              \--       \--        \--
                                                 unf., mg/L as                                                                                                   
                                                 calcium carbonate                                                                                               

  00915                                          Calcium, wat.,    5        7.700     7.000     \--       \--              \--              \--       \--        \--
                                                 filt., mg/L                                                                                                     

  00925                                          Magnesium, wat.,  5        2.900     2.600     \--       \--              \--              \--       \--        \--
                                                 filt., mg/L                                                                                                     

  00935                                          Potassium, wat.,  5        3.100     2.900     \--       \--              \--              \--       \--        \--
                                                 filt., mg/L                                                                                                     

  00931                                          Sodium adsorption 5        1.000     1.000     \--       \--              \--              \--       \--        \--
                                                 ratio, wat.,                                                                                                    
                                                 number                                                                                                          

  00930                                          Sodium, wat.,     5        18.000    14.000    \--       \--              \--              \--       \--        \--
                                                 filt., mg/L                                                                                                     

  00932                                          Sodium, wat.,     5        54.000    48.000    \--       \--              \--              \--       \--        \--
                                                 percent in                                                                                                      
                                                 equivalents of                                                                                                  
                                                 major cations                                                                                                   

  90410                                          Acid neutralizing 5        36.000    31.000    \--       \--              \--              \--       \--        \--
                                                 capacity, wat.,                                                                                                 
                                                 unf., fixed                                                                                                     
                                                 endpoint (pH 4.5)                                                                                               
                                                 titration,                                                                                                      
                                                 laboratory, mg/L                                                                                                
                                                 as calcium                                                                                                      
                                                 carbonate                                                                                                       

  00940                                          Chloride, wat.,   5        14.000    11.000    \--       \--              \--              \--       \--        \--
                                                 filt., mg/L                                                                                                     

  00950                                          Fluoride, wat.,   5        \--       \--       \--       \--              \--              \--       \--        \--
                                                 filt., mg/L                                                                                                     

  00955                                          Silica, wat.,     5        4.800     2.300     \--       \--              \--              \--       \--        \--
                                                 filt., mg/L                                                                                                     

  00945                                          Sulfate, wat.,    5        17.000    14.000    \--       \--              \--              \--       \--        \--
                                                 filt., mg/L                                                                                                     

  70300                                          Residue on        5        90.000    72.000    \--       \--              \--              \--       \--        \--
                                                 evaporation,                                                                                                    
                                                 dried at 180                                                                                                    
                                                 degrees Celsius,                                                                                                
                                                 wat., filt., mg/L                                                                                               

  00608                                          Ammonia, wat.,    5        \--       \--       \--       \--              \--              \--       \--        \--
                                                 filt., mg/L as                                                                                                  
                                                 nitrogen                                                                                                        

  00623                                          Ammonia plus      5        0.500     0.300     \--       \--              \--              \--       \--        \--
                                                 organic nitrogen,                                                                                               
                                                 wat., filt., mg/L                                                                                               
                                                 as nitrogen                                                                                                     

  00625                                          Ammonia plus      5        0.900     0.500     \--       \--              \--              \--       \--        \--
                                                 organic nitrogen,                                                                                               
                                                 wat., unf., mg/L                                                                                                
                                                 as nitrogen                                                                                                     

  00610                                          Ammonia, wat.,    4        0.150     0.020     \--       \--              \--              \--       \--        \--
                                                 unf., mg/L as                                                                                                   
                                                 nitrogen                                                                                                        

  00620                                          Nitrate, wat.,    2        0.270     0.070     \--       \--              \--              \--       \--        \--
                                                 unf., mg/L as                                                                                                   
                                                 nitrogen                                                                                                        
  ------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum    Minimum   Mean       **Percentile**                                                      
  code**                                                                        size                                                                                                         
  ---------------------------------------------- ------------------------------ -------- ---------- --------- ---------- ---------------- ---------- ---------- ------ ---------- ---------- ---------
                                                                                                                         95th                                   75th   50th       **25th**   **5th**

  00631                                          Nitrite plus nitrate, wat.,    5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 filt., mg/L as nitrogen                                                                                                                     

  00630                                          Nitrite plus nitrate, wat.,    4        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 unf., mg/L as nitrogen                                                                                                                      

  00613                                          Nitrite, wat., filt., mg/L as  5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 nitrogen                                                                                                                                    

  00615                                          Nitrite, wat., unf., mg/L as   4        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 nitrogen                                                                                                                                    

  00605                                          Organic nitrogen, wat., unf.,  5        0.880      0.470     \--        \--                         \--               \--        \--        \--
                                                 mg/L                                                                                                                                        

  00666                                          Phosphorus, wat., filt., mg/L  5        \--        \--       \--        \--                         \--               \--        \--        \--

  00671                                          Orthophosphate, wat., filt.,   5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 mg/L as phosphorus                                                                                                                          

  70507                                          Orthophosphate, wat., unf.,    4        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 mg/L as phosphorus                                                                                                                          

  00665                                          Phosphorus, wat., unf., mg/L   5        0.100      0.020     \--        \--                         \--               \--        \--        \--

  00680                                          Organic carbon, wat., unf.,    5        11.000     8.000     \--        \--                         \--               \--        \--        \--
                                                 mg/L                                                                                                                                        

  70953                                          Chlorophyll a, phytoplankton,  5        9.500      1.000     \--        \--                         \--               \--        \--        \--
                                                 chromatographic-fluorometric                                                                                                                
                                                 method, ug/L                                                                                                                                

  70954                                          Chlorophyll b, phytoplankton,  5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 chromatographic-fluorometric                                                                                                                
                                                 method, ug/L                                                                                                                                

  01105                                          Aluminum, wat., unf.,          5        310.000    40.000    \--        \--                         \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01002                                          Arsenic, wat., unf., ug/L      5        \--        \--       \--        \--                         \--               \--        \--        \--

  01027                                          Cadmium, wat., unf., ug/L      5        \--        \--       \--        \--                         \--               \--        \--        \--

  01034                                          Chromium, wat., unf.,          5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01037                                          Cobalt, wat., unf.,            5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01042                                          Copper, wat., unf.,            5        7.000      1.000     \--        \--                         \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01045                                          Iron, wat., unf., recoverable, 5        650.000    60.000    \--        \--                         \--               \--        \--        \--
                                                 ug/L                                                                                                                                        

  01051                                          Lead, wat., unf., recoverable, 5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 ug/L                                                                                                                                        

  01055                                          Manganese, wat., unf.,         5        470.000    20.000    \--        \--                         \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  71900                                          Mercury, wat., unf.,           5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01062                                          Molybdenum, wat., unf.,        5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01067                                          Nickel, wat., unf.,            5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01147                                          Selenium, wat., unf., ug/L     5        \--        \--       \--        \--                         \--               \--        \--        \--

  01077                                          Silver, wat., unf.,            5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01092                                          Zinc, wat., unf., recoverable, 5        \--        \--       \--        \--                         \--               \--        \--        \--
                                                 ug/L                                                                                                                                        

  **0209782520**[]{#__RefHeading___Toc50352720                                                                                                                                               
  .anchor} **White Oak Creek at Green Level                                                                                                                                                  
  (September 1999--August 2002)**                                                                                                                                                            

  00061                                          Discharge, instantaneous,      17       317.000    0.720     42.591                      317.000    14.500            6.200      1.600      0.720
                                                 cubic feet per second                                                                                                                       

  00080                                          Color, wat., filt., platinum   14       200.000    40.000    99.286                      200.000    142.500           90.000     58.750     40.000
                                                 cobalt units                                                                                                                                

  00300                                          Dissolved oxygen, wat., unf.,  17       12.000     5.500     8.129                       12.000     9.785             8.140      6.665      5.500
                                                 mg/L                                                                                                                                        

  00301                                          Dissolved oxygen, wat., unf.,  16       93.000     55.000    79.812                      93.000     87.750            79.500     76.000     55.000
                                                 percent of saturation                                                                                                                       

  00400                                          pH, wat., unf., field,         17       6.900      5.600     6.448                       6.900      6.630             6.520      6.300      5.600
                                                 standard units                                                                                                                              

  00403                                          pH, wat., unf., laboratory,    16       7.500      6.400     7.094                       7.500      7.200             7.100      7.025      6.400
                                                 standard units                                                                                                                              

  90095                                          Specific conductance, wat.,    16       110.000    53.000    89.062                      110.000    98.250            93.000     82.000     53.000
                                                 unf., laboratory, microsiemens                                                                                                              
                                                 per centimeter at 25 degrees                                                                                                                
                                                 Celsius                                                                                                                                     

  00095                                          Specific conductance, wat.,    17       108.000    45.000    78.841                      108.000    91.250            82.000     69.900     45.000
                                                 unf., microsiemens per                                                                                                                      
                                                 centimeter at 25 degrees                                                                                                                    
                                                 Celsius                                                                                                                                     

  00900                                          Hardness, wat., unf., mg/L as  16       32.000     12.000    22.938                      32.000     26.750            23.000     19.250     12.000
                                                 calcium carbonate                                                                                                                           

  00915                                          Calcium, wat., filt., mg/L     16       7.900      2.700     5.556                       7.900      6.650             5.350      4.475      2.700

  00925                                          Magnesium, wat., filt., mg/L   16       3.100      1.100     2.187                       3.100      2.500             2.200      1.900      1.100

  00935                                          Potassium, wat., filt., mg/L   16       3.700      2.000     2.688                       3.700      3.050             2.550      2.400      2.000

  00931                                          Sodium adsorption ratio, wat., 16       0.700      0.400     0.544                       0.700      0.600             0.500      0.500      0.400
                                                 number                                                                                                                                      

  00930                                          Sodium, wat., filt., mg/L      16       8.100      3.100     6.019                       8.100      6.575             6.200      5.775      3.100

  00932                                          Sodium, wat., percent in       16       41.000     27.000    33.500                      41.000     38.000            32.500     30.250     27.000
                                                 equivalents of major cations                                                                                                                

  90410                                          Acid neutralizing capacity,    16       36.000     7.200     21.094                      36.000     28.500            19.500     14.000     7.200
                                                 wat., unf., fixed endpoint (pH                                                                                                              
                                                 4.5) titration, laboratory,                                                                                                                 
                                                 mg/L as calcium carbonate                                                                                                                   

  00410                                          Acid neutralizing capacity,    4        21.000     13.000    \--                         \--        \--               \--        \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                                              
                                                 4.5) titration, field, mg/L as                                                                                                              
                                                 calcium carbonate                                                                                                                           

  00419                                          Acid neutralizing capacity,    14       32.000     5.000     20.429                      32.000     28.250            20.500     12.750     5.000
                                                 wat., unf., incremental                                                                                                                     
                                                 titration, field, mg/L as                                                                                                                   
                                                 calcium carbonate                                                                                                                           

  99440                                          Bicarbonate, wat., unf.,       13       40.000     5.800     24.292                      40.000     34.600            24.000     15.500     5.800
                                                 incremental titration, field,                                                                                                               
                                                 mg/L                                                                                                                                        

  00940                                          Chloride, wat., filt., mg/L    16       10.000     3.800     6.981                       10.000     8.525             6.950      6.250      3.800

  00950                                          Fluoride, wat., filt., mg/L    16       0.200      \--       0.092\*                     \*0.200    \*0.100           \*0.088    \*0.056    \*0.038

  00955                                          Silica, wat., filt., mg/L      16       9.400      4.100     7.025                       9.400      8.400             6.800      5.675      4.100

  00945                                          Sulfate, wat., filt., mg/L     16       20.000     2.600     6.888                       20.000     8.575             6.250      3.700      2.600

  70300                                          Residue on evaporation, dried  16       83.000     57.000    70.438                      83.000     79.750            71.000     62.000     57.000
                                                 at 180 degrees Celsius, wat.,                                                                                                               
                                                 filt., mg/L                                                                                                                                 

  00608                                          Ammonia, wat., filt., mg/L as  16       0.045      0.002     0.016                       0.045      0.025             0.013      0.004      0.002
                                                 nitrogen                                                                                                                                    

  00625                                          Ammonia plus organic nitrogen, 16       0.800      0.400     0.556                       0.800      0.675             0.600      0.400      0.400
                                                 wat., unf., mg/L as nitrogen                                                                                                                

  00631                                          Nitrite plus nitrate, wat.,    16       0.130      \--       0.038\*                     \*0.130    \*0.053           \*0.025    \*0.015    \*0.005
                                                 filt., mg/L as nitrogen                                                                                                                     

  00613                                          Nitrite, wat., filt., mg/L as  16       0.004      \--       0.002\*                     \*0.004    \*0.002           \*0.001    \*0.001    \*0.000
                                                 nitrogen                                                                                                                                    

  00605                                          Organic nitrogen, wat., unf.,  16       0.840      0.340     0.536                       0.840      0.637             0.530      0.433      0.340
                                                 mg/L                                                                                                                                        

  00671                                          Orthophosphate, wat., filt.,   16       0.130      \--       0.014\*                     \*0.130    \*0.013           \*0.005    \*0.001    \*0.000
                                                 mg/L as phosphorus                                                                                                                          

  00665                                          Phosphorus, wat., unf., mg/L   15       0.110      \--       0.048\*                     \*0.110    \*0.060           \*0.040    \*0.030    \*0.025

  00680                                          Organic carbon, wat., unf.,    16       17.000     8.500     11.519                      17.000     13.000            11.000     10.000     8.500
                                                 mg/L                                                                                                                                        

  01105                                          Aluminum, wat., unf.,          8        1020.000   50.700    435.087                     1020.000   893.500           252.000    142.500    50.700
                                                 recoverable, ug/L                                                                                                                           

  01002                                          Arsenic, wat., unf., ug/L      8        \--        \--       \--                         \--        \--               \--        \--        \--

  01027                                          Cadmium, wat., unf., ug/L      8        \--        \--       \--                         \--        \--               \--        \--        \--

  01034                                          Chromium, wat., unf.,          8        \--        \--       \--                         \--        \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01037                                          Cobalt, wat., unf.,            8        \--        \--       \--                         \--        \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01042                                          Copper, wat., unf.,            8        4.000      \--       1.883\*                     \*4.000    \*2.750           \*1.531    \*1.000    \*1.000
                                                 recoverable, ug/L                                                                                                                           

  01045                                          Iron, wat., unf., recoverable, 8        3190.000   902.000   1615.000                    3190.000   2522.500          1185.000   1001.000   902.000
                                                 ug/L                                                                                                                                        

  01051                                          Lead, wat., unf., recoverable, 8        3.000      \--       1.424\*                     \*3.000    \*2.000           \*1.032    \*0.823    \*0.636
                                                 ug/L                                                                                                                                        

  01055                                          Manganese, wat., unf.,         8        297.000    55.900    158.538                     297.000    275.000           110.000    80.550     55.900
                                                 recoverable, ug/L                                                                                                                           

  71900                                          Mercury, wat., unf.,           7        \--        \--       \--                         \--        \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01062                                          Molybdenum, wat., unf.,        8        \--        \--       \--                         \--        \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01067                                          Nickel, wat., unf.,            8        2.000      \--       1.247\*                     \*2.000    \*1.792           \*1.000    \*0.932    \*0.900
                                                 recoverable, ug/L                                                                                                                           

  01147                                          Selenium, wat., unf., ug/L     8        \--        \--       \--                         \--        \--               \--        \--        \--

  01077                                          Silver, wat., unf.,            8        \--        \--       \--                         \--        \--               \--        \--        \--
                                                 recoverable, ug/L                                                                                                                           

  01092                                          Zinc, wat., unf., recoverable, 8        \--        \--       \--                         \--        \--               \--        \--        \--
                                                 ug/L                                                                                                                                        

  80154                                          Suspended sediment             16       73.800     3.000     19.731                      73.800     20.650            13.000     6.000      3.000
                                                 concentration, mg/L                                                                                                                         

  **0209799150**[]{#__RefHeading___Toc50352721                                                                                                                                               
  .anchor} **B.E. Jordan Lake above U.S. 64 at                                                                                                                                               
  Wilsonville (July 1991--August 2001)**                                                                                                                                                     

  00080                                          Color, wat., filt., platinum   44       90.000     5.000     29.455     62.500                      36.500            27.500     18.250     9.250
                                                 cobalt units                                                                                                                                

  00078                                          Transparency, wat., unf.,      37       1.200      0.450     0.650      1.020                       0.750             0.600      0.550      0.450
                                                 Secchi disc, meters                                                                                                                         

  00300                                          Dissolved oxygen, wat., unf.,  58       12.000     0.400     7.280      10.285                      8.802             7.990      6.475      0.477
                                                 mg/L                                                                                                                                        

  00301                                          Dissolved oxygen, wat., unf.,  58       138.000    5.000     82.966     124.500                     104.000           88.500     72.750     5.000
                                                 percent of saturation                                                                                                                       

  00400                                          pH, wat., unf., field,         59       9.050      6.300     7.436      8.800                       7.800             7.170      6.940      6.470
                                                 standard units                                                                                                                              

  00403                                          pH, wat., unf., laboratory,    44       9.000      6.500     7.577      8.575                       8.100             7.600      7.100      6.625
                                                 standard units                                                                                                                              

  90095                                          Specific conductance, wat.,    44       166.000    85.000    134.591    165.000                     147.750           137.000    124.500    87.250
                                                 unf., laboratory, microsiemens                                                                                                              
                                                 per centimeter at 25 degrees                                                                                                                
                                                 Celsius                                                                                                                                     

  00095                                          Specific conductance, wat.,    59       194.000    80.000    135.780    166.000                     147.000           136.000    128.000    94.000
                                                 unf., microsiemens per                                                                                                                      
                                                 centimeter at 25 degrees                                                                                                                    
                                                 Celsius                                                                                                                                     

  00900                                          Hardness, wat., unf., mg/L as  44       33.000     20.000    28.023     31.000                      30.000            29.000     27.000     20.500
                                                 calcium carbonate                                                                                                                           

  00915                                          Calcium, wat., filt., mg/L     44       8.200      5.100     7.023      7.900                       7.500             7.200      6.700      5.200

  00925                                          Magnesium, wat., filt., mg/L   44       3.000      1.800     2.550      2.900                       2.700             2.600      2.400      1.825

  00935                                          Potassium, wat., filt., mg/L   44       3.400      1.900     2.823      3.300                       3.100             2.900      2.600      1.925

  00931                                          Sodium adsorption ratio, wat., 44       1.000      0.700     0.943      1.000                       1.000             1.000      0.900      0.700
                                                 number                                                                                                                                      

  00930                                          Sodium, wat., filt., mg/L      44       18.000     6.900     13.109     18.000                      15.000            13.000     11.000     6.975

  00932                                          Sodium, wat., percent in       44       53.000     39.000    46.750     53.000                      49.000            47.000     43.250     39.250
                                                 equivalents of major cations                                                                                                                

  99430                                          Carbonate, wat., unf.,         24       36.000     7.000     27.375     35.750                      32.000            28.000     24.250     9.250
                                                 incremental titration, field,                                                                                                               
                                                 mg/L as calcium carbonate                                                                                                                   

  90410                                          Acid neutralizing capacity,    44       38.000     11.000    29.909     36.000                      34.750            31.500     26.000     18.500
                                                 wat., unf., fixed endpoint (pH                                                                                                              
                                                 4.5) titration, laboratory,                                                                                                                 
                                                 mg/L as calcium carbonate                                                                                                                   

  00410                                          Acid neutralizing capacity,    25       36.000     10.000    28.100     35.850                      32.500            29.000     25.000     11.800
                                                 wat., unf., fixed endpoint (pH                                                                                                              
                                                 4.5) titration, field, mg/L as                                                                                                              
                                                 calcium carbonate                                                                                                                           

  00419                                          Acid neutralizing capacity,    8        33.000     24.800    29.225     33.000                      31.750            29.500     26.500     24.800
                                                 wat., unf., incremental                                                                                                                     
                                                 titration, field, mg/L as                                                                                                                   
                                                 calcium carbonate                                                                                                                           

  99440                                          Bicarbonate, wat., unf.,       32       42.000     9.000     33.175     41.350                      38.000            34.000     30.475     16.150
                                                 incremental titration, field,                                                                                                               
                                                 mg/L                                                                                                                                        
  ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum    Minimum   Mean      **Percentile**                                         
  code**                                                                        size                                                                                           
  ---------------------------------------------- ------------------------------ -------- ---------- --------- --------- ---------------- --------- ------ --------- ---------- ---------
                                                                                                                        95th                       75th   50th      **25th**   **5th**

  99445                                          Carbonate, wat., unf.,         14       4.000      0.000     0.929     4.000            1.250            0.500     0.000      0.000
                                                 incremental titration, field,                                                                                                 
                                                 mg/L                                                                                                                          

  00452                                          Carbonate, wat., filt.,        1        0.000      \--       \--       \--              \--              \--       \--        \--
                                                 incremental titration, field,                                                                                                 
                                                 mg/L                                                                                                                          

  00940                                          Chloride, wat., filt., mg/L    43       20.000     6.400     11.937    16.600           14.000           12.000    11.000     6.560

  00950                                          Fluoride, wat., filt., mg/L    43       0.300      0.100     0.184     0.280            0.200            0.200     0.200      0.100

  00955                                          Silica, wat., filt., mg/L      42       6.500      0.800     4.021     6.440            5.025            4.150     3.125      1.915

  00945                                          Sulfate, wat., filt., mg/L     43       18.000     0.300     12.442    16.800           15.000           12.000    11.000     8.040

  70300                                          Residue on evaporation, dried  42       114.000    62.000    82.548    106.250          90.500           80.500    74.000     64.300
                                                 at 180 degrees Celsius, wat.,                                                                                                 
                                                 filt., mg/L                                                                                                                   

  00608                                          Ammonia, wat., filt., mg/L as  53       1.400      \--       0.073\*   \*0.270          \*0.070          \*0.020   \*0.005    \*0.002
                                                 nitrogen                                                                                                                      

  00623                                          Ammonia plus organic nitrogen, 26       0.900      0.200     0.438     0.830            0.500            0.400     0.375      0.235
                                                 wat., filt., mg/L as nitrogen                                                                                                 

  00625                                          Ammonia plus organic nitrogen, 53       2.200      0.400     0.717     1.000            0.800            0.700     0.600      0.470
                                                 wat., unf., mg/L as nitrogen                                                                                                  

  00610                                          Ammonia, wat., unf., mg/L as   6        \--        \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                      

  00620                                          Nitrate, wat., unf., mg/L as   1        0.110      \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                      

  00631                                          Nitrite plus nitrate, wat.,    53       0.270      \--       0.060\*   \*0.220          \*0.120          \*0.012   \*0.004    \*0.001
                                                 filt., mg/L as nitrogen                                                                                                       

  00630                                          Nitrite plus nitrate, wat.,    6        \--        \--       \--       \--              \--              \--       \--        \--
                                                 unf., mg/L as nitrogen                                                                                                        

  00613                                          Nitrite, wat., filt., mg/L as  53       0.027      \--       0.006\*   \*0.020          \*0.008          \*0.004   \*0.002    \*0.001
                                                 nitrogen                                                                                                                      

  00615                                          Nitrite, wat., unf., mg/L as   6        \--        \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                      

  00605                                          Organic nitrogen, wat., unf.,  44       1.000      0.320     0.640     0.970            0.740            0.610     0.522      0.392
                                                 mg/L                                                                                                                          

  00666                                          Phosphorus, wat., filt., mg/L  26       0.030      \--       0.009\*   \*0.030          \*0.010          \*0.006   \*0.003    \*0.001

  00671                                          Orthophosphate, wat., filt.,   53       0.088      \--       0.004\*   \*0.010          \*0.004          \*0.002   \*0.001    \*0.000
                                                 mg/L as phosphorus                                                                                                            

  70507                                          Orthophosphate, wat., unf.,    6        \--        \--       \--       \--              \--              \--       \--        \--
                                                 mg/L as phosphorus                                                                                                            

  00665                                          Phosphorus, wat., unf., mg/L   53       0.190      \--       0.039\*   \*0.063          \*0.041          \*0.040   \*0.030    \*0.014

  00680                                          Organic carbon, wat., unf.,    43       17.000     2.300     8.958     13.600           9.600            8.800     8.100      6.820
                                                 mg/L                                                                                                                          

  70953                                          Chlorophyll a, phytoplankton,  43       40.500     1.200     13.307    37.700           18.600           10.500    4.700      1.620
                                                 chromatographic-fluorometric                                                                                                  
                                                 method, ug/L                                                                                                                  

  70954                                          Chlorophyll b, phytoplankton,  43       3.900      \--       0.801\*   \*2.060          \*1.100          \*0.700   \*0.293    \*0.105
                                                 chromatographic-fluorometric                                                                                                  
                                                 method, ug/L                                                                                                                  

  01105                                          Aluminum, wat., unf.,          31       294.000    20.000    83.255    243.600          100.000          60.000    50.000     26.000
                                                 recoverable, ug/L                                                                                                             

  01002                                          Arsenic, wat., unf., ug/L      31       \--        \--       \--       \--              \--              \--       \--        \--

  01027                                          Cadmium, wat., unf., ug/L      31       \--        \--       \--       \--              \--              \--       \--        \--

  01034                                          Chromium, wat., unf.,          31       4.000      \--       0.677\*   \*3.580          \*0.733          \*0.271   \*0.100    \*0.024
                                                 recoverable, ug/L                                                                                                             

  01037                                          Cobalt, wat., unf.,            31       \--        \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                             

  01042                                          Copper, wat., unf.,            31       3.000      \--       1.232\*   \*3.000          \*2.000          \*1.000   \*0.698    \*0.370
                                                 recoverable, ug/L                                                                                                             

  01045                                          Iron, wat., unf., recoverable, 48       3910.000   40.000    335.879   1883.749         267.500          165.000   110.000    53.015
                                                 ug/L                                                                                                                          

  01051                                          Lead, wat., unf., recoverable, 30       \--        \--       \--       \--              \--              \--       \--        \--
                                                 ug/L                                                                                                                          

  01055                                          Manganese, wat., unf.,         48       3670.000   10.000    293.363   2311.348         177.250          110.000   80.000     34.500
                                                 recoverable, ug/L                                                                                                             

  71900                                          Mercury, wat., unf.,           31       \--        \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                             

  01062                                          Molybdenum, wat., unf.,        31       3.000      \--       1.444\*   \*3.000          \*2.000          \*1.000   \*0.884    \*0.524
                                                 recoverable, ug/L                                                                                                             

  01067                                          Nickel, wat., unf.,            31       8.000      \--       1.081\*   \*5.000          \*1.000          \*0.617   \*0.304    \*0.104
                                                 recoverable, ug/L                                                                                                             

  01147                                          Selenium, wat., unf., ug/L     31       \--        \--       \--       \--              \--              \--       \--        \--

  01077                                          Silver, wat., unf.,            31       \--        \--       \--       \--              \--              \--       \--        \--
                                                 recoverable, ug/L                                                                                                             

  01092                                          Zinc, wat., unf., recoverable, 31       \--        \--       \--       \--              \--              \--       \--        \--
                                                 ug/L                                                                                                                          

  **0209801050**[]{#__RefHeading___Toc50352722                                                                                                                                 
  .anchor} **Jordan Lake at buoy 7 below U.S. 64                                                                                                                               
  near Griffins Crossroads (December 1988--June                                                                                                                                
  1992)**                                                                                                                                                                      

  00080                                          Color, wat., filt., platinum   5        30.000     13.000    \--       \--              \--              \--       \--        \--
                                                 cobalt units                                                                                                                  

  00300                                          Dissolved oxygen, wat., unf.,  13       12.700     8.600     9.985     12.700           11.050           9.800     8.755      8.600
                                                 mg/L                                                                                                                          

  00301                                          Dissolved oxygen, wat., unf.,  5        122.000    81.000    \--       \--              \--              \--       \--        \--
                                                 percent of saturation                                                                                                         

  00400                                          pH, wat., unf., field,         13       9.400      6.600     7.927     9.400            8.925            7.600     6.950      6.600
                                                 standard units                                                                                                                

  00403                                          pH, wat., unf., laboratory,    5        8.700      7.200     \--       \--              \--              \--       \--        \--
                                                 standard units                                                                                                                

  90095                                          Specific conductance, wat.,    5        157.000    143.000   \--       \--              \--              \--       \--        \--
                                                 unf., laboratory, microsiemens                                                                                                
                                                 per centimeter at 25 degrees                                                                                                  
                                                 Celsius                                                                                                                       

  00095                                          Specific conductance, wat.,    13       179.000    98.000    131.769   179.000          150.500          130.000   109.000    98.000
                                                 unf., microsiemens per                                                                                                        
                                                 centimeter at 25 degrees                                                                                                      
                                                 Celsius                                                                                                                       

  00900                                          Hardness, wat., unf., mg/L as  5        30.000     28.000    \--       \--              \--              \--       \--        \--
                                                 calcium carbonate                                                                                                             

  00915                                          Calcium, wat., filt., mg/L     5        7.500      6.900     \--       \--              \--              \--       \--        \--

  00925                                          Magnesium, wat., filt., mg/L   5        3.100      2.600     \--       \--              \--              \--       \--        \--

  00935                                          Potassium, wat., filt., mg/L   5        3.200      3.000     \--       \--              \--              \--       \--        \--

  00931                                          Sodium adsorption ratio, wat., 5        1.000      1.000     \--       \--              \--              \--       \--        \--
                                                 number                                                                                                                        

  00930                                          Sodium, wat., filt., mg/L      5        18.000     16.000    \--       \--              \--              \--       \--        \--

  00932                                          Sodium, wat., percent in       5        54.000     50.000    \--       \--              \--              \--       \--        \--
                                                 equivalents of major cations                                                                                                  

  90410                                          Acid neutralizing capacity,    5        36.000     30.000    \--       \--              \--              \--       \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                                
                                                 4.5) titration, laboratory,                                                                                                   
                                                 mg/L as calcium carbonate                                                                                                     

  00940                                          Chloride, wat., filt., mg/L    5        14.000     12.000    \--       \--              \--              \--       \--        \--

  00950                                          Fluoride, wat., filt., mg/L    5        0.300      0.200     \--       \--              \--              \--       \--        \--

  00955                                          Silica, wat., filt., mg/L      5        4.900      2.300     \--       \--              \--              \--       \--        \--

  00945                                          Sulfate, wat., filt., mg/L     5        18.000     15.000    \--       \--              \--              \--       \--        \--

  70300                                          Residue on evaporation, dried  5        96.000     77.000    \--       \--              \--              \--       \--        \--
                                                 at 180 degrees Celsius, wat.,                                                                                                 
                                                 filt., mg/L                                                                                                                   

  00608                                          Ammonia, wat., filt., mg/L as  5        \--        \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                      

  00623                                          Ammonia plus organic nitrogen, 5        0.500      0.300     \--       \--              \--              \--       \--        \--
                                                 wat., filt., mg/L as nitrogen                                                                                                 

  00625                                          Ammonia plus organic nitrogen, 5        0.800      0.500     \--       \--              \--              \--       \--        \--
                                                 wat., unf., mg/L as nitrogen                                                                                                  

  00610                                          Ammonia, wat., unf., mg/L as   4        \--        \--       \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                      

  00620                                          Nitrate, wat., unf., mg/L as   2        0.280      0.140     \--       \--              \--              \--       \--        \--
                                                 nitrogen                                                                                                                      
  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum   Minimum   Mean      **Percentile**                                                         
  code**                                                                        size                                                                                                          
  ---------------------------------------------- ------------------------------ -------- --------- --------- --------- ---------------- --------- ----- ------ --------- --------- ---------- ---------
                                                                                                                       95th                             75th             50th      **25th**   **5th**

  00631                                          Nitrite plus nitrate, wat.,    5        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 filt., mg/L as nitrogen                                                                                                                      

  00630                                          Nitrite plus nitrate, wat.,    4        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 unf., mg/L as nitrogen                                                                                                                       

  00613                                          Nitrite, wat., filt., mg/L as  5        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 nitrogen                                                                                                                                     

  00615                                          Nitrite, wat., unf., mg/L as   4        0.020     0.000     \--       \--                        \--                    \--       \--        \--
                                                 nitrogen                                                                                                                                     

  00605                                          Organic nitrogen, wat., unf.,  4        0.770     0.470     \--       \--                        \--                    \--       \--        \--
                                                 mg/L                                                                                                                                         

  00666                                          Phosphorus, wat., filt., mg/L  5        \--       \--       \--       \--                        \--                    \--       \--        \--

  00671                                          Orthophosphate, wat., filt.,   5        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 mg/L as phosphorus                                                                                                                           

  70507                                          Orthophosphate, wat., unf.,    4        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 mg/L as phosphorus                                                                                                                           

  00665                                          Phosphorus, wat., unf., mg/L   5        0.100     0.020     \--       \--                        \--                    \--       \--        \--

  00680                                          Organic carbon, wat., unf.,    5        26.000    8.000     \--       \--                        \--                    \--       \--        \--
                                                 mg/L                                                                                                                                         

  70953                                          Chlorophyll a, phytoplankton,  4        7.800     1.100     \--       \--                        \--                    \--       \--        \--
                                                 chromatographic-fluorometric                                                                                                                 
                                                 method, ug/L                                                                                                                                 

  70954                                          Chlorophyll b, phytoplankton,  4        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 chromatographic-fluorometric                                                                                                                 
                                                 method, ug/L                                                                                                                                 

  01105                                          Aluminum, wat., unf.,          5        300.000   40.000    \--       \--                        \--                    \--       \--        \--
                                                 recoverable, ug/L                                                                                                                            

  01002                                          Arsenic, wat., unf., ug/L      5        \--       \--       \--       \--                        \--                    \--       \--        \--

  01027                                          Cadmium, wat., unf., ug/L      5        \--       \--       \--       \--                        \--                    \--       \--        \--

  01034                                          Chromium, wat., unf.,          5        2.000     1.000     \--       \--                        \--                    \--       \--        \--
                                                 recoverable, ug/L                                                                                                                            

  01037                                          Cobalt, wat., unf.,            5        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 recoverable, ug/L                                                                                                                            

  01042                                          Copper, wat., unf.,            5        8.000     1.000     \--       \--                        \--                    \--       \--        \--
                                                 recoverable, ug/L                                                                                                                            

  01045                                          Iron, wat., unf., recoverable, 5        570.000   60.000    \--       \--                        \--                    \--       \--        \--
                                                 ug/L                                                                                                                                         

  01051                                          Lead, wat., unf., recoverable, 5        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 ug/L                                                                                                                                         

  01055                                          Manganese, wat., unf.,         5        390.000   20.000    \--       \--                        \--                    \--       \--        \--
                                                 recoverable, ug/L                                                                                                                            

  71900                                          Mercury, wat., unf.,           5        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 recoverable, ug/L                                                                                                                            

  01062                                          Molybdenum, wat., unf.,        5        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 recoverable, ug/L                                                                                                                            

  01067                                          Nickel, wat., unf.,            5        2.000     1.000     \--       \--                        \--                    \--       \--        \--
                                                 recoverable, ug/L                                                                                                                            

  01147                                          Selenium, wat., unf., ug/L     5        \--       \--       \--       \--                        \--                    \--       \--        \--

  01077                                          Silver, wat., unf.,            5        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 recoverable, ug/L                                                                                                                            

  01092                                          Zinc, wat., unf., recoverable, 5        \--       \--       \--       \--                        \--                    \--       \--        \--
                                                 ug/L                                                                                                                                         

  **0209801100**[]{#__RefHeading___Toc50352723                                                                                                                                                
  .anchor} **B.E. Jordan Lake at Bells Landing                                                                                                                                                
  near Griffins Crossroads (July 1991--August                                                                                                                                                 
  2001)**                                                                                                                                                                                     

  00080                                          Color, wat., filt., platinum   28       110.000   5.000     27.714                     85.250                 30.000    20.500    15.250     6.350
                                                 cobalt units                                                                                                                                 

  00078                                          Transparency, wat., unf.,      19       1.100     0.450     0.663                      1.100                  0.750     0.650     0.550      0.450
                                                 Secchi disc, meters                                                                                                                          

  00300                                          Dissolved oxygen, wat., unf.,  41       11.200    0.380     7.385                      10.570                 9.200     8.200     6.300      0.641
                                                 mg/L                                                                                                                                         

  00301                                          Dissolved oxygen, wat., unf.,  41       129.000   5.000     87.366                     126.600                111.500   95.000    73.000     7.600
                                                 percent of saturation                                                                                                                        

  00400                                          pH, wat., unf., field,         42       9.090     6.200     7.612                      9.009                  8.500     7.315     6.760      6.395
                                                 standard units                                                                                                                               

  00403                                          pH, wat., unf., laboratory,    28       9.000     6.800     7.782                      8.955                  8.450     7.600     7.300      6.890
                                                 standard units                                                                                                                               

  90095                                          Specific conductance, wat.,    28       272.000   86.000    145.714                    230.150                154.750   149.500   128.500    90.500
                                                 unf., laboratory, microsiemens                                                                                                               
                                                 per centimeter at 25 degrees                                                                                                                 
                                                 Celsius                                                                                                                                      

  00095                                          Specific conductance, wat.,    42       177.000   83.000    143.500                    174.650                156.000   146.500   133.750    97.050
                                                 unf., microsiemens per                                                                                                                       
                                                 centimeter at 25 degrees                                                                                                                     
                                                 Celsius                                                                                                                                      

  00900                                          Hardness, wat., unf., mg/L as  28       32.000    20.000    27.893                     31.550                 30.000    28.000    27.000     20.900
                                                 calcium carbonate                                                                                                                            

  00915                                          Calcium, wat., filt., mg/L     28       7.900     5.000     6.843                      7.810                  7.300     6.900     6.700      5.090

  00925                                          Magnesium, wat., filt., mg/L   28       3.100     1.900     2.607                      3.010                  2.800     2.600     2.500      1.990

  00935                                          Potassium, wat., filt., mg/L   28       3.600     1.900     2.943                      3.555                  3.275     3.000     2.625      1.945

  00931                                          Sodium adsorption ratio, wat., 28       2.000     0.700     1.004                      1.550                  1.000     1.000     1.000      0.745
                                                 number                                                                                                                                       

  00930                                          Sodium, wat., filt., mg/L      28       20.000    7.000     14.514                     19.550                 17.000    15.000    12.250     7.765

  00932                                          Sodium, wat., percent in       28       57.000    39.000    49.250                     55.650                 52.750    49.000    47.250     40.800
                                                 equivalents of major cations                                                                                                                 

  99430                                          Carbonate, wat., unf.,         13       39.000    16.000    27.154                     39.000                 33.000    26.000    22.500     16.000
                                                 incremental titration, field,                                                                                                                
                                                 mg/L as calcium carbonate                                                                                                                    

  90410                                          Acid neutralizing capacity,    28       47.000    19.000    31.857                     42.950                 35.000    32.000    28.000     20.800
                                                 wat., unf., fixed endpoint (pH                                                                                                               
                                                 4.5) titration, laboratory,                                                                                                                  
                                                 mg/L as calcium carbonate                                                                                                                    

  00410                                          Acid neutralizing capacity,    14       39.000    16.000    28.271                     39.000                 33.850    28.000    24.750     16.000
                                                 wat., unf., fixed endpoint (pH                                                                                                               
                                                 4.5) titration, field, mg/L as                                                                                                               
                                                 calcium carbonate                                                                                                                            

  00419                                          Acid neutralizing capacity,    5        31.000    24.000    \--                        \--                    \--       \--       \--        \--
                                                 wat., unf., incremental                                                                                                                      
                                                 titration, field, mg/L as                                                                                                                    
                                                 calcium carbonate                                                                                                                            

  99440                                          Bicarbonate, wat., unf.,       18       48.000    20.000    32.939                     48.000                 39.000    33.500    27.000     20.000
                                                 incremental titration, field,                                                                                                                
                                                 mg/L                                                                                                                                         
  -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS Param-eter\                             **Constituent name**           Sample   Maximum     Minimum   Mean       **Percentile**                                                                                                  
  code**                                                                        size                                                                                                                                                      
  ---------------------------------------------- ------------------------------ -------- ----------- --------- ---------- ---------------- ----------- ----------- --------- ------ ---------- ---------- ---------- --------- ---------- ---------
                                                                                                                          95th                                               75th                         50th                 **25th**   **5th**

  99445                                          Carbonate, wat., unf.,         10       9.000       0.000     1.200                                   9.000                        1.250                 0.000                0.000      0.000
                                                 incremental titration, field,                                                                                                                                                            
                                                 mg/L                                                                                                                                                                                     

  00940                                          Chloride, wat., filt., mg/L    28       16.000      6.400     12.246                                  16.000                       14.000                13.000               11.000     6.715

  00950                                          Fluoride, wat., filt., mg/L    28       0.300       \--       0.194\*                                 \*0.300                      \*0.200               \*0.200              \*0.200    \*0.100

  00955                                          Silica, wat., filt., mg/L      28       6.300       1.900     4.114                                   6.075                        5.250                 4.450                2.700      2.035

  00945                                          Sulfate, wat., filt., mg/L     28       18.000      9.300     14.171                                  18.000                       16.750                14.500               12.000     9.390

  70300                                          Residue on evaporation, dried  27       110.000     63.000    85.741                                  106.000                      93.000                88.000               78.000     65.000
                                                 at 180 degrees Celsius, wat.,                                                                                                                                                            
                                                 filt., mg/L                                                                                                                                                                              

  00608                                          Ammonia, wat., filt., mg/L as  36       0.289       \--       0.046\*                                 \*0.189                      \*0.040               \*0.020              \*0.006    \*0.002
                                                 nitrogen                                                                                                                                                                                 

  00623                                          Ammonia plus organic nitrogen, 19       1.200       0.300     0.474                                   1.200                        0.500                 0.400                0.300      0.300
                                                 wat., filt., mg/L as nitrogen                                                                                                                                                            

  00625                                          Ammonia plus organic nitrogen, 36       1.300       0.400     0.722                                   1.215                        0.800                 0.700                0.600      0.485
                                                 wat., unf., mg/L as nitrogen                                                                                                                                                             

  00610                                          Ammonia, wat., unf., mg/L as   5        \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 nitrogen                                                                                                                                                                                 

  00620                                          Nitrate, wat., unf., mg/L as   1        0.150       \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 nitrogen                                                                                                                                                                                 

  00631                                          Nitrite plus nitrate, wat.,    36       0.260       \--       0.072\*                                 \*0.243                      \*0.110               \*0.021              \*0.006    \*0.002
                                                 filt., mg/L as nitrogen                                                                                                                                                                  

  00630                                          Nitrite plus nitrate, wat.,    5        \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 unf., mg/L as nitrogen                                                                                                                                                                   

  00613                                          Nitrite, wat., filt., mg/L as  36       0.020       \--       0.007\*                                 \*0.020                      \*0.008               \*0.007              \*0.004    \*0.002
                                                 nitrogen                                                                                                                                                                                 

  00615                                          Nitrite, wat., unf., mg/L as   5        \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 nitrogen                                                                                                                                                                                 

  00605                                          Organic nitrogen, wat., unf.,  30       1.200       0.380     0.659                                   1.046                        0.740                 0.660                0.575      0.424
                                                 mg/L                                                                                                                                                                                     

  00666                                          Phosphorus, wat., filt., mg/L  19       0.030       \--       0.007\*                                 \*0.030                      \*0.010               \*0.004              \*0.002    \*0.001

  00671                                          Orthophosphate, wat., filt.,   36       0.010       \--       0.003\*                                 \*0.010                      \*0.003               \*0.002              \*0.001    \*0.000
                                                 mg/L as phosphorus                                                                                                                                                                       

  70507                                          Orthophosphate, wat., unf.,    5        \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 mg/L as phosphorus                                                                                                                                                                       

  00665                                          Phosphorus, wat., unf., mg/L   36       0.130       \--       0.036\*                                 \*0.090                      \*0.044               \*0.030              \*0.026    \*0.011

  00680                                          Organic carbon, wat., unf.,    26       10.000      6.700     8.488                                   9.930                        9.225                 8.550                7.700      6.910
                                                 mg/L                                                                                                                                                                                     

  70953                                          Chlorophyll a, phytoplankton,  28       35.100      2.400     12.175                                  32.265                       16.325                9.250                6.025      2.895
                                                 chromatographic-fluorometric                                                                                                                                                             
                                                 method, ug/L                                                                                                                                                                             

  70954                                          Chlorophyll b, phytoplankton,  28       1.800       \--       0.610\*                                 \*1.575                      \*0.950               \*0.450              \*0.283    \*0.129
                                                 chromatographic-fluorometric                                                                                                                                                             
                                                 method, ug/L                                                                                                                                                                             

  01105                                          Aluminum, wat., unf.,          23       257.000     30.000    92.191                                  255.600                      130.000               60.000               40.000     30.000
                                                 recoverable, ug/L                                                                                                                                                                        

  01002                                          Arsenic, wat., unf., ug/L      23       \--         \--       \--                                     \--                          \--                   \--                  \--        \--

  01025                                          Cadmium, wat., filt., ug/L     1        \--         \--       \--                                     \--                          \--                   \--                  \--        \--

  01027                                          Cadmium, wat., unf., ug/L      23       \--         \--       \--                                     \--                          \--                   \--                  \--        \--

  01034                                          Chromium, wat., unf.,          23       \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01037                                          Cobalt, wat., unf.,            23       \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01040                                          Copper, wat., filt., ug/L      1        2.000       \--       \--                                     \--                          \--                   \--                  \--        \--

  01042                                          Copper, wat., unf.,            23       6.000       \--       1.552\*                                 \*5.400                      \*2.000               \*1.000              \*0.666    \*0.305
                                                 recoverable, ug/L                                                                                                                                                                        

  01045                                          Iron, wat., unf., recoverable, 40       2740.000    47.400    290.895                                 1719.151                     247.500               140.000              80.000     49.905
                                                 ug/L                                                                                                                                                                                     

  01049                                          Lead, wat., filt., ug/L        1        \--         \--       \--                                     \--                          \--                   \--                  \--        \--

  01051                                          Lead, wat., unf., recoverable, 22       \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 ug/L                                                                                                                                                                                     

  01056                                          Manganese, wat., filt., ug/L   1        66.000      \--       \--                                     \--                          \--                   \--                  \--        \--

  01055                                          Manganese, wat., unf.,         39       2930.000    20.000    208.526                                 664.000                      161.000               90.000               57.400     20.000
                                                 recoverable, ug/L                                                                                                                                                                        

  71900                                          Mercury, wat., unf.,           23       \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01062                                          Molybdenum, wat., unf.,        23       3.000       \--       1.211\*                                 \*2.800                      \*2.000               \*1.000              \*0.704    \*0.404
                                                 recoverable, ug/L                                                                                                                                                                        

  01067                                          Nickel, wat., unf.,            23       3.000       \--       1.156\*                                 \*2.800                      \*2.000               \*1.000              \*0.665    \*0.382
                                                 recoverable, ug/L                                                                                                                                                                        

  01145                                          Selenium, wat., filt., ug/L    1        \--         \--       \--                                     \--                          \--                   \--                  \--        \--

  01147                                          Selenium, wat., unf., ug/L     23       \--         \--       \--                                     \--                          \--                   \--                  \--        \--

  01077                                          Silver, wat., unf.,            23       \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01090                                          Zinc, wat., filt., ug/L        1        21.000      \--       \--                                     \--                          \--                   \--                  \--        \--

  01092                                          Zinc, wat., unf., recoverable, 23       \--         \--       \--                                     \--                          \--                   \--                  \--        \--
                                                 ug/L                                                                                                                                                                                     

  []{#__RefHeading___Toc50352724                                                                                                                                                                                                          
  .anchor}**02098198 Haw River below B. Everett                                                                                                                                                                                           
  Jordan dam near Moncure (December 1988--April                                                                                                                                                                                           
  1995)**                                                                                                                                                                                                                                 

  00060                                          Discharge, cubic feet per      2        390.000     384.000   \--                                     \--                                     \--                   \--       \--        \--
                                                 second                                                                                                                                                                                   

  00061                                          Discharge, instantaneous,      16       14700.000   235.000   2403.562                                14700.000                               3855.000              542.000   426.000    235.000
                                                 cubic feet per second                                                                                                                                                                    

  00300                                          Dissolved oxygen, wat., unf.,  16       13.000      6.500     8.881                                   13.000                                  10.150                9.250     6.725      6.500
                                                 mg/L                                                                                                                                                                                     

  00400                                          pH, wat., unf., field,         17       7.400       6.300     7.064                                   7.400                                   7.255                 7.100     6.900      6.300
                                                 standard units                                                                                                                                                                           

  00095                                          Specific conductance, wat.,    16       216.000     63.000    131.312                                 216.000                                 158.750               129.000   94.500     63.000
                                                 unf., microsiemens per                                                                                                                                                                   
                                                 centimeter at 25 degrees                                                                                                                                                                 
                                                 Celsius                                                                                                                                                                                  

  00927                                          Magnesium, wat., unf.,         1        2.700       \--       \--                                     \--                                     \--                   \--       \--        \--
                                                 recoverable, mg/L                                                                                                                                                                        

  31616                                          Fecal coliform, M-FC MF (0.45  1        \--         \--       \--                                     \--                                     \--                   \--       \--        \--
                                                 micron) method, wat., colonies                                                                                                                                                           
                                                 per 100 milliliters                                                                                                                                                                      

  **0210140200**[]{#__RefHeading___Toc50352725                                                                                                                                                                                            
  .anchor} **Deep River at Carbonton (January                                                                                                                                                                                             
  1993--August 1996)**                                                                                                                                                                                                                    

  00080                                          Color, wat., filt., platinum   1        200.000     \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 cobalt units                                                                                                                                                                             

  00300                                          Dissolved oxygen, wat., unf.,  6        9.900       5.200     6.750      9.900                                    8.775                                  5.900                5.200      5.200
                                                 mg/L                                                                                                                                                                                     

  00301                                          Dissolved oxygen, wat., unf.,  2        88.000      77.000    \--        \--                                      \--                                    \--                  \--        \--
                                                 percent of saturation                                                                                                                                                                    

  00400                                          pH, wat., unf., field,         6        7.100       6.900     7.017      7.100                                    7.100                                  7.000                6.975      6.900
                                                 standard units                                                                                                                                                                           

  00403                                          pH, wat., unf., laboratory,    1        6.700       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 standard units                                                                                                                                                                           

  90095                                          Specific conductance, wat.,    1        86.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 unf., laboratory, microsiemens                                                                                                                                                           
                                                 per centimeter at 25 degrees                                                                                                                                                             
                                                 Celsius                                                                                                                                                                                  

  00095                                          Specific conductance, wat.,    6        242.000     80.000    138.333    242.000                                  180.500                                132.500              82.250     80.000
                                                 unf., microsiemens per                                                                                                                                                                   
                                                 centimeter at 25 degrees                                                                                                                                                                 
                                                 Celsius                                                                                                                                                                                  

  00900                                          Hardness, wat., unf., mg/L as  1        23.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 calcium carbonate                                                                                                                                                                        

  00915                                          Calcium, wat., filt., mg/L     1        5.400       \--       \--        \--                                      \--                                    \--                  \--        \--

  00925                                          Magnesium, wat., filt., mg/L   1        2.200       \--       \--        \--                                      \--                                    \--                  \--        \--

  00935                                          Potassium, wat., filt., mg/L   1        2.900       \--       \--        \--                                      \--                                    \--                  \--        \--

  00931                                          Sodium adsorption ratio, wat., 1        0.500       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 number                                                                                                                                                                                   

  00930                                          Sodium, wat., filt., mg/L      1        5.800       \--       \--        \--                                      \--                                    \--                  \--        \--

  00932                                          Sodium, wat., percent in       1        32.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 equivalents of major cations                                                                                                                                                             

  99430                                          Carbonate, wat., unf.,         1        20.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 incremental titration, field,                                                                                                                                                            
                                                 mg/L as calcium carbonate                                                                                                                                                                

  90410                                          Acid neutralizing capacity,    1        17.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                                                                                           
                                                 4.5) titration, laboratory,                                                                                                                                                              
                                                 mg/L as calcium carbonate                                                                                                                                                                

  00410                                          Acid neutralizing capacity,    1        22.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 wat., unf., fixed endpoint (pH                                                                                                                                                           
                                                 4.5) titration, field, mg/L as                                                                                                                                                           
                                                 calcium carbonate                                                                                                                                                                        

  99440                                          Bicarbonate, wat., unf.,       1        24.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 incremental titration, field,                                                                                                                                                            
                                                 mg/L                                                                                                                                                                                     

  99445                                          Carbonate, wat., unf.,         1        0.000       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 incremental titration, field,                                                                                                                                                            
                                                 mg/L                                                                                                                                                                                     

  00940                                          Chloride, wat., filt., mg/L    1        7.600       \--       \--        \--                                      \--                                    \--                  \--        \--

  00950                                          Fluoride, wat., filt., mg/L    1        \--         \--       \--        \--                                      \--                                    \--                  \--        \--

  00955                                          Silica, wat., filt., mg/L      1        9.500       \--       \--        \--                                      \--                                    \--                  \--        \--

  00945                                          Sulfate, wat., filt., mg/L     1        7.300       \--       \--        \--                                      \--                                    \--                  \--        \--

  70300                                          Residue on evaporation, dried  1        66.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 at 180 degrees Celsius, wat.,                                                                                                                                                            
                                                 filt., mg/L                                                                                                                                                                              

  00608                                          Ammonia, wat., filt., mg/L as  1        0.100       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 nitrogen                                                                                                                                                                                 

  00623                                          Ammonia plus organic nitrogen, 1        0.500       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 wat., filt., mg/L as nitrogen                                                                                                                                                            

  00625                                          Ammonia plus organic nitrogen, 1        0.800       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 wat., unf., mg/L as nitrogen                                                                                                                                                             

  00631                                          Nitrite plus nitrate, wat.,    1        0.800       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 filt., mg/L as nitrogen                                                                                                                                                                  

  00613                                          Nitrite, wat., filt., mg/L as  1        0.030       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 nitrogen                                                                                                                                                                                 

  00605                                          Organic nitrogen, wat., unf.,  1        0.700       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 mg/L                                                                                                                                                                                     

  00666                                          Phosphorus, wat., filt., mg/L  1        0.110       \--       \--        \--                                      \--                                    \--                  \--        \--

  00671                                          Orthophosphate, wat., filt.,   1        0.100       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 mg/L as phosphorus                                                                                                                                                                       

  00665                                          Phosphorus, wat., unf., mg/L   1        0.250       \--       \--        \--                                      \--                                    \--                  \--        \--

  00680                                          Organic carbon, wat., unf.,    1        12.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 mg/L                                                                                                                                                                                     

  01105                                          Aluminum, wat., unf.,          1        1400.000    \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01002                                          Arsenic, wat., unf., ug/L      1        \--         \--       \--        \--                                      \--                                    \--                  \--        \--

  01027                                          Cadmium, wat., unf., ug/L      1        \--         \--       \--        \--                                      \--                                    \--                  \--        \--

  01034                                          Chromium, wat., unf.,          1        4.000       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01037                                          Cobalt, wat., unf.,            1        1.000       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01042                                          Copper, wat., unf.,            1        5.000       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01045                                          Iron, wat., unf., recoverable, 1        1700.000    \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 ug/L                                                                                                                                                                                     

  01051                                          Lead, wat., unf., recoverable, 1        3.000       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 ug/L                                                                                                                                                                                     

  01055                                          Manganese, wat., unf.,         1        70.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  71900                                          Mercury, wat., unf.,           1        \--         \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01062                                          Molybdenum, wat., unf.,        1        \--         \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01067                                          Nickel, wat., unf.,            1        2.000       \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01147                                          Selenium, wat., unf., ug/L     1        \--         \--       \--        \--                                      \--                                    \--                  \--        \--

  01077                                          Silver, wat., unf.,            1        \--         \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 recoverable, ug/L                                                                                                                                                                        

  01092                                          Zinc, wat., unf., recoverable, 1        20.000      \--       \--        \--                                      \--                                    \--                  \--        \--
                                                 ug/L                                                                                                                                                                                     

  80154                                          Suspended sediment             2        68.000      48.000    \--        \--                                      \--                                    \--                  \--        \--
                                                 concentration, mg/L                                                                                                                                                                      

  **0210215985**[]{#__RefHeading___Toc50352726                                                                                                                                                                                            
  .anchor} **Cape Fear River at N.C. 42 near                                                                                                                                                                                              
  Brickhaven (October 1988--August 2001)**                                                                                                                                                                                                

  00060                                          Discharge, cubic feet per      121      22700.000   439.000   3318.248                    15690.002                                3635.000              1410.000             750.000    551.800
                                                 second                                                                                                                                                                                   

  00080                                          Color, wat., filt., platinum   120      250.000     12.000    69.550                      199.000                                  91.500                55.000               35.250     15.250
                                                 cobalt units                                                                                                                                                                             

  00300                                          Dissolved oxygen, wat., unf.,  119      15.000      2.200     9.084                       12.900                                   11.400                9.100                7.200      4.200
                                                 mg/L                                                                                                                                                                                     

  00301                                          Dissolved oxygen, wat., unf.,  117      173.000     27.000    91.068                      123.200                                  101.000               93.000               80.000     51.000
                                                 percent of saturation                                                                                                                                                                    

  00400                                          pH, wat., unf., field,         121      8.430       6.200     7.114                       7.754                                    7.310                 7.100                6.855      6.600
                                                 standard units                                                                                                                                                                           

  00403                                          pH, wat., unf., laboratory,    121      8.000       6.400     7.322                       7.800                                    7.500                 7.300                7.100      6.900
                                                 standard units                                                                                                                                                                           

  90095                                          Specific conductance, wat.,    121      298.000     46.000    152.612                     261.700                                  176.500               146.000              116.500    77.000
                                                 unf., laboratory, microsiemens                                                                                                                                                           
                                                 per centimeter at 25 degrees                                                                                                                                                             
                                                 Celsius                                                                                                                                                                                  

  00095                                          Specific conductance, wat.,    120      298.000     42.000    150.667                     258.800                                  176.750               145.000              116.000    72.250
                                                 unf., microsiemens per                                                                                                                                                                   
                                                 centimeter at 25 degrees                                                                                                                                                                 
                                                 Celsius                                                                                                                                                                                  

  00900                                          Hardness, wat., unf., mg/L as  121      40.000      12.000    28.645                      36.000                                   32.000                29.000               26.000     20.000
                                                 calcium carbonate                                                                                                                                                                        

  00915                                          Calcium, wat., filt., mg/L     121      10.000      2.500     6.948                       9.000                                    7.700                 6.900                6.300      4.910

  00925                                          Magnesium, wat., filt., mg/L   121      3.600       1.300     2.735                       3.390                                    3.100                 2.800                2.500      1.900

  00935                                          Potassium, wat., filt., mg/L   121      5.800       1.400     3.341                       5.300                                    3.950                 3.300                2.500      1.810

  00931                                          Sodium adsorption ratio, wat., 121      3.000       0.300     1.258                       3.000                                    2.000                 1.000                0.900      0.500
                                                 number                                                                                                                                                                                   

  00930                                          Sodium, wat., filt., mg/L      121      40.000      2.700     16.426                      34.900                                   20.500                14.000               10.500     5.700

  00932                                          Sodium, wat., percent in       121      66.000      26.000    49.281                      64.000                                   56.000                49.000               43.000     33.100
                                                 equivalents of major cations                                                                                                                                                             

  99430                                          Carbonate, wat., unf.,         52       61.000      5.000     29.173                      52.200                                   35.750                27.000               21.250     13.300
                                                 incremental titration, field,                                                                                                                                                            
                                                 mg/L as calcium carbonate                                                                                                                                                                

  90410                                          Acid neutralizing capacity,    121      50.000      11.000    29.463                      43.900                                   36.000                29.000               24.000     16.000
                                                 wat., unf., fixed endpoint (pH                                                                                                                                                           
                                                 4.5) titration, laboratory,                                                                                                                                                              
                                                 mg/L as calcium carbonate                                                                                                                                                                

  39086                                          Alkalinity, wat., filt.,       1        22.000      \--       \--                         \--                                      \--                   \--                  \--        \--
                                                 incremental titration, field,                                                                                                                                                            
                                                 mg/L as calcium carbonate                                                                                                                                                                

  00410                                          Acid neutralizing capacity,    59       62.000      7.000     29.559                      48.000                                   36.000                28.000               22.000     14.000
                                                 wat., unf., fixed endpoint (pH                                                                                                                                                           
                                                 4.5) titration, field, mg/L as                                                                                                                                                           
                                                 calcium carbonate                                                                                                                                                                        

  00419                                          Acid neutralizing capacity,    15       41.000      13.000    29.733                      41.000                                   37.000                31.000               24.000     13.000
                                                 wat., unf., incremental                                                                                                                                                                  
                                                 titration, field, mg/L as                                                                                                                                                                
                                                 calcium carbonate                                                                                                                                                                        
  -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  --------------------------------------------------------------------------------------------------------------------------------------------------------------
  **NWIS        **Constituent     Sample   Maximum    Minimum   Mean       **Percentile**                                                              
  Param-eter\   name**            size                                                                                                                 
  code**                                                                                                                                               
  ------------- ----------------- -------- ---------- --------- ---------- ---------------- ---------- -------- ------ ---------- --------- ---------- ---------
                                                                           95th                                 75th              50th      **25th**   **5th**

  99440         Bicarbonate,      67       74.000     6.000     36.007                      56.800                     44.000     34.000    28.000     16.400
                wat., unf.,                                                                                                                            
                incremental                                                                                                                            
                titration, field,                                                                                                                      
                mg/L                                                                                                                                   

  00453         Bicarbonate,      1        27.000     \--       \--                         \--                        \--        \--       \--        \--
                wat., filt.,                                                                                                                           
                incremental                                                                                                                            
                titration, field,                                                                                                                      
                mg/L                                                                                                                                   

  99445         Carbonate, wat.,  12       0.000      \--       \--                         \--                        \--        \--       \--        \--
                unf., incremental                                                                                                                      
                titration, field,                                                                                                                      
                mg/L                                                                                                                                   

  00940         Chloride, wat.,   116      32.000     4.800     13.851                      29.150                     17.000     12.000    9.325      5.685
                filt., mg/L                                                                                                                            

  00950         Fluoride, wat.,   115      0.600      \--       0.167\*                     \*0.300                    \*0.200    \*0.200   \*0.100    \*0.061
                filt., mg/L                                                                                                                            

  00955         Silica, wat.,     116      13.000     0.300     7.685                       11.000                     9.675      8.150     5.900      3.370
                filt., mg/L                                                                                                                            

  00945         Sulfate, wat.,    116      37.000     4.000     16.040                      31.150                     20.000     14.500    11.000     8.055
                filt., mg/L                                                                                                                            

  99890         Sulfate, wat.,    7        \--        \--       \--                         \--                        \--        \--       \--        \--
                filt.,                                                                                                                                 
                uncorrected, mg/L                                                                                                                      

  70300         Residue on        115      268.000    32.000    99.461                      150.400                    112.000    94.000    80.000     59.800
                evaporation,                                                                                                                           
                dried at 180                                                                                                                           
                degrees Celsius,                                                                                                                       
                wat., filt., mg/L                                                                                                                      

  00608         Ammonia, wat.,    115      0.410      0.002     0.085                       0.215                      0.120      0.070     0.040      0.013
                filt., mg/L as                                                                                                                         
                nitrogen                                                                                                                               

  00623         Ammonia plus      83       1.700      0.200     0.581                       1.080                      0.600      0.500     0.400      0.300
                organic nitrogen,                                                                                                                      
                wat., filt., mg/L                                                                                                                      
                as nitrogen                                                                                                                            

  00625         Ammonia plus      119      1.700      0.100     0.728                       1.100                      0.900      0.700     0.600      0.500
                organic nitrogen,                                                                                                                      
                wat., unf., mg/L                                                                                                                       
                as nitrogen                                                                                                                            

  00610         Ammonia, wat.,    44       0.410      0.020     0.104                       0.257                      0.130      0.090     0.060      0.022
                unf., mg/L as                                                                                                                          
                nitrogen                                                                                                                               

  00620         Nitrate, wat.,    41       1.390      0.280     0.588                       1.169                      0.685      0.570     0.450      0.292
                unf., mg/L as                                                                                                                          
                nitrogen                                                                                                                               

  00631         Nitrite plus      116      1.200      0.007     0.544                       0.908                      0.697      0.535     0.442      0.053
                nitrate, wat.,                                                                                                                         
                filt., mg/L as                                                                                                                         
                nitrogen                                                                                                                               

  00630         Nitrite plus      44       1.400      0.100     0.592                       1.150                      0.700      0.575     0.500      0.150
                nitrate, wat.,                                                                                                                         
                unf., mg/L as                                                                                                                          
                nitrogen                                                                                                                               

  00613         Nitrite, wat.,    91       0.160      \--       0.020\*                     \*0.101                    \*0.020    \*0.010   \*0.007    \*0.003
                filt., mg/L as                                                                                                                         
                nitrogen                                                                                                                               

  00615         Nitrite, wat.,    44       0.170      0.000     0.028                       0.120                      0.030      0.020     0.010      0.000
                unf., mg/L as                                                                                                                          
                nitrogen                                                                                                                               

  00605         Organic nitrogen, 118      1.600      0.340     0.646                       1.000                      0.745      0.610     0.507      0.410
                wat., unf., mg/L                                                                                                                       

  00666         Phosphorus, wat., 86       0.150      0.010     0.062                       0.130                      0.080      0.060     0.040      0.020
                filt., mg/L                                                                                                                            

  00671         Orthophosphate,   115      0.270      \--       0.053\*                     \*0.130                    \*0.070    \*0.040   \*0.030    \*0.008
                wat., filt., mg/L                                                                                                                      
                as phosphorus                                                                                                                          

  70507         Orthophosphate,   44       0.160      0.020     0.071                       0.142                      0.100      0.070     0.050      0.020
                wat., unf., mg/L                                                                                                                       
                as phosphorus                                                                                                                          

  00665         Phosphorus, wat., 119      0.380      0.020     0.115                       0.270                      0.130      0.100     0.070      0.050
                unf., mg/L                                                                                                                             

  00680         Organic carbon,   120      22.000     0.800     8.700                       14.000                     9.475      8.000     7.300      5.905
                wat., unf., mg/L                                                                                                                       

  01105         Aluminum, wat.,   50       3400.000   60.000    645.420                     2415.000                   930.000    420.000   173.750    85.500
                unf.,                                                                                                                                  
                recoverable, ug/L                                                                                                                      

  01002         Arsenic, wat.,    50       2.000      \--       0.720\*                     \*1.450                    \*1.000    \*0.651   \*0.496    \*0.317
                unf., ug/L                                                                                                                             

  01027         Cadmium, wat.,    50       \--        \--       \--                         \--                        \--        \--       \--        \--
                unf., ug/L                                                                                                                             

  01034         Chromium, wat.,   50       30.000     \--       1.914\*                     \*6.700                    \*2.000    \*0.813   \*0.369    \*0.109
                unf.,                                                                                                                                  
                recoverable, ug/L                                                                                                                      

  01037         Cobalt, wat.,     50       3.000      \--       0.913\*                     \*2.000                    \*1.000    \*0.800   \*0.552    \*0.337
                unf.,                                                                                                                                  
                recoverable, ug/L                                                                                                                      

  01042         Copper, wat.,     49       16.000     1.000     4.531                       11.500                     5.000      4.000     3.000      2.000
                unf.,                                                                                                                                  
                recoverable, ug/L                                                                                                                      

  01045         Iron, wat., unf., 50       4700.000   10.000    1100.540                    3465.001                   1525.000   840.000   485.000    215.950
                recoverable, ug/L                                                                                                                      

  01051         Lead, wat., unf., 49       12.000     \--       1.968\*                     \*8.500                    \*2.000    \*1.000   \*0.652    \*0.275
                recoverable, ug/L                                                                                                                      

  01055         Manganese, wat.,  50       680.000    60.000    180.074                     670.000                    190.000    130.000   100.000    60.000
                unf.,                                                                                                                                  
                recoverable, ug/L                                                                                                                      

  71900         Mercury, wat.,    49       \--        \--       \--                         \--                        \--        \--       \--        \--
                unf.,                                                                                                                                  
                recoverable, ug/L                                                                                                                      

  01062         Molybdenum, wat., 50       4.800      \--       1.480\*                     \*4.000                    \*2.000    \*1.000   \*0.696    \*0.332
                unf.,                                                                                                                                  
                recoverable, ug/L                                                                                                                      

  01067         Nickel, wat.,     49       8.000      \--       2.414\*                     \*6.000                    \*3.000    \*2.000   \*1.589    \*0.783
                unf.,                                                                                                                                  
                recoverable, ug/L                                                                                                                      

  01147         Selenium, wat.,   50       \--        \--       \--                         \--                        \--        \--       \--        \--
                unf., ug/L                                                                                                                             

  01077         Silver, wat.,     48       \--        \--       \--                         \--                        \--        \--       \--        \--
                unf.,                                                                                                                                  
                recoverable, ug/L                                                                                                                      

  01092         Zinc, wat., unf., 50       210.000    \--       13.623\*                    \*30.000                   \*19.550   \*6.975   \*3.465    \*1.263
                recoverable, ug/L                                                                                                                      

  80154         Suspended         106      290.000    1.000     29.395     99.650                      30.250                     16.000    10.000     5.000
                sediment                                                                                                                               
                concentration,                                                                                                                         
                mg/L                                                                                                                                   
  --------------------------------------------------------------------------------------------------------------------------------------------------------------