Summary of Data from Onsite and Laboratory Analyses 

of Surface Water and Marsh Porewater from South Florida 

Water Management District Water Conservation Areas, 

the Everglades, South Florida, March 1995

By Michael M. Reddy and Charmaine D. Gunther

Open-File Report 2012–1063

U.S. Department of the Interior

U.S. Geological Survey
U.S. Department of the Interior

KEN SALAZAR, Secretary

U.S. Geological Survey

Marcia K. McNutt, Director

U.S. Geological Survey, Reston, Virginia: 2012 

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Suggested citation:

Reddy, M.M., and Gunther C.D., 2012, Summary of data from onsite and laboratory analyses of surface water and 

marsh porewater from South Florida Water Management District Water Conservation Areas, the Everglades, South 

Florida, March 1995: U.S. Geological Survey Open-File Report 2012–1063, 14 p. 

Any use of trade, product, or firm names is for descriptive purposes only and does not imply 

endorsement by the U.S. Government. 

Although this report is in the public domain, permission must be secured from the individual 

copyright owners to reproduce any copyrighted material contained within this report.
iii

Contents

Abstract ......................................................................................................................................................................... 1

Introduction.................................................................................................................................................................... 1

Data File ........................................................................................................................................................................ 2

Summary ....................................................................................................................................................................... 2

References Cited........................................................................................................................................................... 2

Tables

1. Variable names and codes for sample description and identification ...................................................................... 4

2. Variable names for onsite and laboratory measured parameters............................................................................ 5

3. Summary standard reference water samples (SRWS) and distilled-water blank samples (SBL)............................ 6

4. Detection limits for laboratory and onsite analyses ................................................................................................. 8

5. Analyses of surface water and march porewater from the South Florida Water Management Districts Water 

Conservation Areas, the Everglades, South Florida, March 1995.

5.A........................................................................................................................................................................... 9

5.B..........................................................................................................................................................................10

5.C .........................................................................................................................................................................11

5.D .........................................................................................................................................................................12

Photographs

1. U3 sampling site in the South Florida Water management District Water Conservation Area 2A..........................13

2. Everglades study site location................................................................................................................................14
1

Summary of Data from Onsite and Laboratory Analyses 

of Surface Water and Marsh Porewater from South Florida 

Water Management District Water Conservation Areas, 

the Everglades, South Florida, March 1995

By Michael M. Reddy and Charmaine D. Gunther

Abstract

This report presents results of chemical analysis for samples collected during March 1995 as part 

of a study to quantify the interaction of aquatic organic material (referred to here as dissolved organic 

carbon with dissolved metal ions. The work was done in conjunction with the South Florida Water 

Management District, the U.S. Environmental Protection Agency, the U.S. Geological Survey South 

Florida Ecosystems Initiative, and the South Florida National Water Quality Assessment Study Unit.

Samples were collected from surface canals and from marsh sites. Results are based on onsite and 

laboratory measurements for 27 samples collected at 10 locations. The data file contains sample 

description, dissolved organic carbon concentration and specific ultraviolet absorbance, and additional 

analytical data for samples collected at several sites in the Water Conservation Areas, the Everglades, 

South Florida.

Introduction

The South Florida Water Management District, the U.S. Environmental Protection Agency

(EPA), and the U.S. Geological Survey (USGS) South Florida Ecosystems Initiative have organized an 

intensive study of surface-water chemistry in southern Florida. In 1994, several locations were selected 

in the Water Conservation Areas of the South Florida Water Management District in conjunction with 

this multidisciplinary, multiagency research project. Surface-water and marsh porewater samples were

collected and analyzed. Details of the onsite and laboratory procedures used in this investigation are 

described in other reports: Fishman and Friedman, 1985; Garbarino and Taylor, 1979 and 1980; Reddy 

and others, 1989; Skougstad and others, 1979; and Wood, 1976. Sample preparation methods, 

analytical procedures, and laboratory quality-control protocols used by the U.S. Geological Survey 

laboratory are described by Cotlove and others, 1958; Fishman and Friedman, 1985; Garbarino and 

Taylor, 1979; and 1980; and Schroder and others, 1980. Field procedures and equipment were adapted 

from a trace metal protocol developed by the USGS National Research Program (Taylor and others, 

1995).

This work has been done as part of the USGS South Florida Ecosystems Initiative and was 

funded in part by the EPA (through Grant IAG #DW14936802-01-0). The purpose of this report is to 

make the results of our investigation of dissolved organic carbon (DOC) concentration, nature, and

distribution available to the South Florida Ecosystem Research Community in a prompt and widely 

available manner. Further additions will be made to the data file as sample collection continues, and as 

laboratory analyses are completed.
2

The data file contains sample description, DOC concentration, and specific ultraviolet 

absorbance. Additional analytical data for samples collected at several sites in the Water Conservation 

Areas, the Everglades, and south Florida are included – these data are intended to be used by this project 

for chemical species modeling. 

Data File

Data are available for samples collected in March 1995 and analyzed shortly thereafter. Surfacewater samples were collected at a single depth from seven locations and at two depths at three locations.

Photograph 1 illustrates a representative water sample collection at site U3 in Water Conservation Area 

2A, Everglades Florida. Marsh porewater samples were collected at several depths below the sediment 

water interface at four locations. Surface-water samples were collected at each pore-water sampling 

location. Photograph 2 illustrates selected Everglades Study Site Locations superimposed on a 

composite map based on the Threshold Study Site Locations map of the South Florida Water 

Management District and a color satellite photograph taken during the spring of 1993. A replicate 

sample was collected to evaluate onsite-sampling variability. Distilled-water blank samples and 

standard reference water samples, SRWS (Schroder and others, 1980), were submitted to the laboratory 

with the onsite samples and were analyzed concomitantly with them. Reference samples were processed 

using the same procedures as the onsite samples. For further information about the availability, call 

Michael M. Reddy at (303) 236-5941 or e-mail at mmreddy@usgs.gov.

The data file consists of 34 variables. Variable names and codes established for sample

description and identification are listed in table 1. Variable names for parameters measured onsite and in 

the laboratory are listed in table 2. Summary statistics for SRWS and distilled-water blank samples are 

given in table 3.

Samples that had analytical results less than the detection limits of the selected methods are 

indicated in the data set by the “less than” symbol (<). The detection limits of quantification are listed in 

table 4. The full data set is given in table 5.

Summary

A total of 27 samples, from 10 locations within South Florida Water Management District 

Water Conservation Areas, have been analyzed using a protocol designed to minimize errors associated 

with sample-handling procedures, laboratory analyses, and data-entry operations.

References Cited

Aiken, G.R., 1992, Chloride interference in the analysis of dissolved organic carbon by the wet 

oxidation method: Environmental Sciences and Technology, v. 26, p. 2435–2439.

Cotlove, E., Trantham, H.V., and Bowman, R.L., 1958, An instrument and method for automatic, rapid, 

accurate and sensitive titration of chloride in biologic samples: Journal of Laboratory and Clinical 

Medicine, v. 51, p. 461–468.

Fishman, M.J., and Friedman, L.C., 1985, Methods for determination of inorganic substances in water 

and fluvial sediments: U.S. Geological Survey Open-File Report 85–95, 709 p.

Garbarino, J.R., and Taylor, H.E., 1979, An inductive-coupled plasma atomic-emission spectrometric 

method for routine water quality testing: Applied Spectroscopy, v. 33, no. 3, p. 220–226.

Garbarino, J.R., and Taylor, H.E., 1980, A babington-type nebulizer for use in the analysis of natural 

water samples by inductively coupled plasma spectrometry: Applied Spectroscopy, v. 34, no. 5, p. 

584–590.
3

Reddy, M.M., Schuster, P.F., and Harte, J.J., 1989, Summary of data from onsite and laboratory 

analyses of precipitation runoff from carbonate-stone surfaces, National Acid Precipitation 

Assessment Program, June 1984 to November 1987: U.S. Geological Survey Open-File Report 89-

246, 19 p.

Schroder, L.J., Fishman, M.J., Friedman, L.C., and Darlington, G.W., 1980, The use of standard

reference water samples by the U.S. Geological Survey: U.S. Geological Survey Open-File Report, 

80-738, 11 p.

Skougstad, M.W., Fishman, M.J., Freidman, L.C., Erdman, D.E., and Duncan, S.S., 1979, Methods for 

the determination of inorganic substances in water and fluvial sediments: U.S. Geological Survey 

Techniques of Water-Resources Investigations 85–495, book 5, Chap. A1, p. 229–230.

Taylor, H.E., Shiller, A.M., Garbarino, J.R. and Brinton, T.I., 1995, Intercomparison experiments on 

dissolved trace-metal data from the Mississippi River and some of its tributaries, 1989–90: U.S. 

Geological Survey Open-File Report 93–628, 28 p.

Wood, W.W., 1976, Guidelines for collection and field analysis of ground-water samples for selected 

unstable constituents: U.S. Geological Survey Techniques of Water-Resources Investigation 76-241, 

p. 2–6.
4

Table 1. Variable names and codes for sample description and identification.

[SRWS, standard reference water samples]

Variable name Code Definition

Collection date (mm/dd/yy) date date sample collected (month/day/year)

Collection time (HH:MM) time time sample collected (hour:minute)

KPH alphanumeric potassium acid phthalate reference sample

Lab ID 4-digit integer lab identification number

Latitude (DDMMSS) 6-digit integer latitude (degrees minutes seconds)

Longitude (DDMMSS) 6-digit integer longitude (degrees minutes seconds)

M102 alphanumeric major ion SRWS

M104 alphanumeric major ion SRWS

M110 alphanumeric major ion SRWS

M112 alphanumeric major ion SRWS

M96 alphanumeric major ion SRWS

Method M manual collection

R replicate sample type

Missing data -99 data not available

MPV alphanumeric most probable value

N alphanumeric number of samples

P11 alphanumeric precipitation ion SRWS

Sample type F pore-water sample type

J surface water sample type

Sampling depth (m) floating point depth that sample was collected (meters)

SBL alphanumeric laboratory blank sample

Site description alphanumeric long site description and notes

Site ID alphanumeric alphanumeric code for site identification

Site name alphanumeric short description of site

SRWS alphanumeric standard reference water sample

Subsample type C canal subsample type

Q marsh subsample type

T107 alphanumeric trace ion SRWS

Download Excel file (table1.xlsx)
5

Table 2. Variable names for onsite and laboratory measured parameters.

[mg/L, milligrams per liter; μeq/L, microequivalents per liter; μmol/L, micromoles per liter; °C, degrees Celsius; μS/cm, microsiemens per centimeter] 

Variable name Definition Units

B (mg/L) dissolved boron as B milligrams per liter

Ba (mg/L) dissolved barium as Ba milligrams per liter

Ca (μeq/L) dissolved calcium as Ca microequivalents per liter

Cl (μeq/L) dissolved chloride as Cl microequivalents per liter

DOC (mg/L) dissolved organic carbon as C milligrams per liter

Fe (mg/L) dissolved iron as Fe milligrams per liter

Field pH (std units) pH measured onsite standard pH units

Field specific conductivity (μS/cm) specific conductivity measured onsite microsiemens per centimeter at 25oC

H4SiO4 (μmol/L) dissolved silica as H4SiO4 micromoles per liter

Ion balance (%) 100% X (Cations - Anions) / (Cations + Anions) (+/-)percent

K (μeq/L) dissolved potassium as K microequivalents per liter

Lab alkalinity (μeq/L) alkalinity measured in laboratory microequivalents per liter

Lab pH (std units) pH measured in laboratory standard pH units

Li (mg/L) dissolved lithium as Li milligrams per liter

Mg (μeq/L) dissolved magnesium as Mg microequivalents per liter

Mn (mg/L) dissolved manganese as Mn milligrams per liter

Na (μeq/L) dissolved sodium as Na microequivalents per liter

SO4 (μeq/L) dissolved sulfate as SO4 microequivalents per liter

Specific UV (Absorb/mg C/L) specific UV absorbance absorbance per milligram carbon per liter

Sr (mg/L) dissolved strontium as Sr milligrams per liter

Water temp (°C) water temperature measured onsite degrees Celsius

Zn (mg/L) dissolved zinc as Zn milligrams per liter

Download Excel file (table2.xlsx) 
6

Table 3. Summary statistics for standard reference water samples (SRWS) and distilled-water blank samples (SBL).

[mg/L, milligrams per liter; μeq/L, microequivalents per liter; μmol/L, micromoles per liter; %, percent; MPV, most probable value; N, Number of samples; N/A, 

Not available; <, less than; >, greater than]

Constituent Sample Units

Mean 1

of reported

values

Standard1

deviation

Range Number of

samples Expected value

Minimum1 Maximum1

Less

than 

detection

N

95%

confidence

MPV

Standard

deviation N

Alkalinity M102 μeq/L 3490 4 3490 3490 0 3 3520±20 80 64

SBL μeq/L -44 13 -52 -29 0 3

B M102 mg/L 0.313 0.017 0.287 0.338 0 9 0.310±0.014 0.038 29

M96 mg/L 0.083 0.008 0.072 0.094 0 7 0.115±0.021 0.054 26

SBL mg/L <0.007 N/A <0.007 <0.007 10 10

T107 mg/L 0.128 0.012 0.119 0.146 0 8 0.130±0.007 0.021 37

Ba SBL mg/L 0.002 N/A 0.002 0.002 9 10

T107 mg/L 0.215 0.014 0.199 0.238 0 8 0.192±0.003 0.011 53

Ca M102 μeq/L 4020 140 3830 4270 0 9 4100±50 200 65

M96 μeq/L 2190 70 2090 2290 0 7 2160±20 100 63

SBL μeq/L 0.9 0.1 0.7 1.1 1 10

T107 μeq/L 580 30 550 630 0 8 584±10 30 60

Cl M104 μeq/L 2000 9 1990 2020 0 5 1950±20 79 64

M110 μeq/L 7520 40 7460 7560 0 5 7500±80 310 77

DOC KPH mg/L 0.27 0.08 0.18 0.33 0 7 0.2 N/A N/A

KPH mg/L 10 0.4 9.5 10.5 0 7 10.2 N/A N/A

KPH mg/L 29.9 1.7 26.5 31.8 0 7 30.2 N/A N/A

Fe SBL mg/L <0.006 N/A <0.006 <0.006 10 10

T107 mg/L 0.052 0.007 0.045 0.061 0 8 0.052±0.002 0.007 68

H4SiO4 M102 μmol/L 108 5 100 114 0 9 110±2 8 45

M96 μmol/L 234 12 214 249 0 7 226±7 22 46

SBL μmol/L 7 N/A 7 7 9 10
7

T107 μmol/L 134 9 125 149 0 8 130±3 8 43

Li SBL mg/L 0.01 N/A 0.01 0.01 9 10

T107 mg/L 0.195 0.019 0.174 0.228 0 8 0.193±0.007 0.014 21

Mg M102 μeq/L 4790 230 4340 5150 0 9 4800±0 200 66

M96 μeq/L 1770 90 1610 1870 0 7 1790±20 91 61

SBL μeq/L 2.1 2.3 0.9 5.5 6 10

T107 μeq/L 174 17 151 208 0 8 173±2 11 61

Mn SBL mg/L 0.0007 N/A 0.0007 0.0007 9 10

T107 mg/L 0.046 0.003 0.043 0.05 1 8 0.045±0.002 0.006 68

Na M102 μeq/L 4800 400 4200 5200 0 9 4698±52 200 66

M96 μeq/L 2600 300 2300 2900 0 7 2540±0 110 58

SBL μeq/L 3.5 1.7 1.3 7.2 0 10

T107 μeq/L 940 100 820 1110 0 8 900±10 48 65

pH M102 8.56 0.04 8.53 8.6 0 3 8.4+/-0 0.1 69

SBL 5.4 0.5 4.9 6 0 3 

SO4 M112 μeq/L 540 12 521 555 0 7 521±6 31 95

M96 μeq/L 2830 0.7 2830 2840 0 6 2890±0 160 55

P11 μeq/L 15.9 0.2 15.6 16.1 0 3 22.1±4 7.7 15

SBL μeq/L >8.3 N/A >8.3 >8.3 45 47

Sr M102 mg/L 1.37 0.06 1.29 1.46 0 9 1.340±0.037 0.093 24

M96 mg/L 0.57 0.03 0.54 0.61 0 7 0.538±0.012 0.029 21

SBL mg/L 0.0006 N/A 0.0006 0.0006 9 10

T107 mg/L 0.065 0.006 0.058 0.075 0 8 0.061±0.001 0.004 29

Zn SBL mg/L 0.01 N/A 0.01 0.01 9 10

T107 mg/L 0.09 0.01 0.08 0.11 0 8 0.0758±0.0025 0.0099 68

1 These statistics were calculated using only those values measured above the limit of detection. If all values were below the detection limit, then the detection 

limit was reported. 

Download Excelfile (table3.xlsx)
8

Table 4. Detection limits for laboratory and onsite analyses.

[mg/L, milligrams per liter; μeq/L, microequivalents per liter; μmols/L, micromoles per liter]

Parameter Units Detection

limit Method of analysis

Alkalinity (μeq/L) none Fishman and Friedman, 1985

B (mg/L) 0.007 Garbarino and Taylor, 1979, 1980

Ba (mg/L) 0.002 Garbarino and Taylor, 1979, 1980

Ca (μeq/L) 0.3 Garbarino and Taylor, 1979, 1980

Cl (μeq/L) 1400 Cotlove and others, 1958

DOC (mg/L) 0.1 Aiken, 1992

Fe (mg/L) 0.006 Garbarino and Taylor, 1979, 1980

H4SiO4 (μmol/L) 5 Garbarino and Taylor, 1979, 1980

K (μeq/L) 3 Skougstad and others, 1979

Li (mg/L) 0.007 Garbarino and Taylor, 1979, 1980

Mg (μeq/L) 0.6 Garbarino and Taylor, 1979, 1980

Mn (mg/L) 0.0005 Garbarino and Taylor, 1979, 1980

Na (μeq/L) 0.4 Garbarino and Taylor, 1979, 1980

SO4 (μeq/L) 8.3 or 240 Fishman and Friedman, 1985

Sr (mg/L) 0.0006 Garbarino and Taylor, 1979, 1980

Zn (mg/L) 0.01 Garbarino and Taylor, 1979, 1980

Download Excel file (table4.xlsx)
9

Table 5 A. Analyses of surface water and marsh porewater from the South Florida Water Management District Water 

Conservation Areas, the Everglades, South Florida, March 1995.

[DD, Degrees; MM, Minutes; SS, Seconds; m, meters]

Lab ID Site ID Site name Latitude 

(DDMMSS)

Longitude 

(DDMMSS)

Sampling

depth (m)

Sample

type

Subsample 

type Method

2103 F1-0CM F1 @ 0 cm 262135 802214 0 J Q M

2104 F1-10CM F1 @ 10 cm 262135 802214 0.1 F Q M

2105 F1-20CM F1 @ 20 cm 262135 802214 0.2 F Q M

2106 F1-30CM F1 @ 30 cm 262135 802214 0.3 F Q M

2107 F1-74CM F1 @ 74 cm 262135 802214 0.74 F Q M

2108 F4-0CM F4 @ surface 261900 802307 0 J Q M 

2109 F4-5CM F4 @ 5cm 261900 802307 0.05 F Q M 

2110 F4-10CM F4 @ 10cm 261900 802307 0.1 F Q M 

2111 F4-20CM F4 @ 20cm 261900 802307 0.2 F Q M 

2112 F4-30CM F4 @ 30 cm 261900 802307 0.3 F Q M 

2113 F4-40CM F4 @ 40cm 261900 802307 0.4 F Q M 

2114 U2 U2 @ surface 261545 802303 0 J Q M 

2115 U3-0CM U3 @ 0cm 261715 802441 0 J Q M 

2116 U3-5CM U3 @ 5cm 261715 802441 0.05 F Q M 

2117 U3-10CM U3 @ 10cm 261715 802441 0.1 F Q M

2118 U3-20CM U3 @ 20cm 261715 802441 0.2 F Q M

2119 U3-30CM U3 @ 30cm 261715 802441 0.3 F Q M

2120 U3-40CM U3 @ 40cm 261715 802441 0.4 F Q M

2121 F0-1M F0 @ 1m 262231 802152 1 J C M

2122 F0-2.5M F0 @ 2.5m 262231 802152 2.5 J C M

2123 E0-1M E0 @ 1m 262217 802105 1 J C M

2124 E0-3M E0 @ 3m 262217 802105 3 J C M

2125 S10D-1M S10D @ 1m 262310 802232 1 J C M

2126 S10D-1MD S10D @ 1m-dup 262310 802232 1 J C R

2127 S10D-2M S10D @ 2m 262310 802232 2 J C M

2128 S10E-1M S10E @ 1m 262732 802654 1 J C M 

2129 L67-S333 L67 @ S333 254607 804023 0 J C M 

2130 L67-S151 L67 @ S151 260054 803027 0 J C M 

Download Excel file (table5a.xlsx) 
10

Table 5 B. Analyses of surface water and marsh porewater from the South Florida Water Management District 

Water Conservation Areas, the Everglades, South Florida, March 1995.

[MM, Month; DD, Day; YY, Year; HH, Hour; MM, Minute; μS/cm, microsiemens per centimeter; °C, degrees Celsius; -99, missing data] 

Lab ID Site ID Collection date

(MM/DD/YY)

Collection time

(HH:MM)

Field pH

(std units)

Field specific

conductivity

(μS/cm)

Water temp

(°C)

2103 F1-0CM 3/29/1995 11:00 -99 -99 -99

2104 F1-10CM 3/29/1995 15:00 -99 -99 -99

2105 F1-20CM 3/29/1995 14:02 -99 -99 -99

2106 F1-30CM 3/29/1995 12:00 -99 -99 -99

2107 F1-74CM 3/29/1995 13:14 -99 -99 -99

2108 F4-0CM 3/29/1995 12:45 -99 -99 -99

2109 F4-5CM 3/29/1995 13:00 -99 -99 -99

2110 F4-10CM 3/29/1995 13:15 -99 -99 -99

2111 F4-20CM 3/29/1995 13:30 -99 -99 -99

2112 F4-30CM 3/29/1995 13:45 -99 -99 -99

2113 F4-40CM 3/29/1995 14:00 -99 -99 -99

2114 U2 3/29/1995 12:00 -99 -99 -99

2115 U3-0CM 3/29/1995 10:05 -99 -99 -99

2116 U3-5CM 3/29/1995 10:30 -99 -99 -99

2117 U3-10CM 3/28/1995 10:45 -99 -99 -99

2118 U3-20CM 3/28/1995 11:00 -99 -99 -99

2119 U3-30CM 3/29/1995 11:15 -99 -99 -99

2120 U3-40CM 3/29/1995 11:00 -99 -99 -99

2121 F0-1M 3/28/1995 14:10 7.4 -99 25.8

2122 F0-2.5M 3/28/1995 15:00 7.3 -99 23.4

2123 E0-1M 3/28/1995 12:05 7.4 1170 24.3

2124 E0-3M 3/28/1995 12:30 7.2 1170 23.5

2125 S10D-1M 3/27/1995 16:00 7.2 1230 25

2126 S10D-1MD 3/27/1995 16:10 7.2 1230 25

2127 S10D-2M 3/27/1995 16:20 7.1 1240 23.7

2128 S10E-1M 3/27/1995 12:53 7.24 1100 24.5

2129 L67-S333 3/29/1995 12:00 -99 -99 -99

2130 L67-S151 3/29/1995 13:00 -99 -99 -99

Download Excel file (table5b.xlsx)
11

Table 5 C. Analyses of surface water and marsh porewater from the South Florida Water Management District Water 

Conservation Areas, the Everglades, South Florida, March 1995.

[μeq/L, microequivalents per liter; % percent] 

Lab ID Site ID Lab pH

(std units)

Lab 

alkalinity

(μeq/L)

Cl

(μeq/L)

SO4

(μeq/L)

Ca

(μeq/L)

Mg

(μeq/L)

Na

(μeq/L)

K 

(μeq/L)

Ion

balance (%)

2103 F1-0CM 7.8 5290 3800 1390 3890 2170 4130 227 -1 

2104 F1-10CM 7.9 12600 6700 270 7100 4100 7980 357 0 

2105 F1-20CM 7.99 17000 10400 240 9070 5480 11400 213 -3 

2106 F1-30CM 8.08 21700 14300 110 11500 7280 16000 141 -2 

2107 F1-74CM 8.23 22500 16700 100 12400 7850 18700 112 0 

2108 F4-0CM 8.33 5390 3400 1340 3900 2450 4810 204 5 

2109 F4-5CM 8.28 8910 5800 270 5520 3220 6750 279 2 

2110 F4-10CM 8.29 9560 5900 230 5910 3490 6630 297 2 

2111 F4-20CM 8.4 11000 6800 190 6840 3950 7790 291 2 

2112 F4-30CM 8.4 12500 8100 130 7630 4180 8740 300 0

2113 F4-40CM 8.5 12700 8200 150 7440 4240 8510 239 -2

2114 U2 7.98 5230 4300 1210 3700 2360 4940 243 2

2115 U3-0CM 8.15 4880 3700 880 3320 2250 4540 192 4

2116 U3-5CM 7.98 8220 4600 170 4920 2960 5110 260 1

2117 U3-10CM 7.9 8200 4600 200 4880 2990 5130 269 1

2118 U3-20CM 8.14 9010 5400 130 5160 3170 6160 262 0

2119 U3-30CM 8.01 9490 7000 50 5510 2800 7190 248 -3 

2120 U3-40CM 8.21 9520 7000 <8.3 6220 2570 7560 258 0 

2121 F0-1M 8.01 6230 4100 1720 4600 2710 4630 222 0 

2122 F0-2.5M 7.96 6250 4100 1680 4630 2690 4750 217 1 

2123 E0-1M 8.03 5950 4000 1770 4260 2470 4070 237 -4 

2124 E0-3M 7.92 6030 4000 1690 4390 2540 4250 251 -2 

2125 S10D-1M 8.13 5940 4200 2360 4610 2780 4320 261 -3 

2126 S10D-1MD 8.1 5930 4100 2340 4550 2760 4180 262 -3 

2127 S10D-2M 8.09 5980 4100 2340 4620 2790 4400 230 -2 

2128 S10E-1M 8.2 4410 3300 1900 3430 2100 3360 215 -3 

2129 L67-S333 8.22 3430 2000 430 2570 1300 2230 115 2 

2130 L67-S151 8.22 3800 2100 630 2950 1490 2350 163 2 

Download Excel file (table5c.xlsx)
12

Table 5 D. Analyses of surface water and marsh porewater from the South Florida Water Management District Water Conservation Areas, the 

Everglades, South Florida, March 1995.

[mg/L, milligrams per liter; Absorb/mg C/L, Absorbance per milligram of carbon per liter; μmol/L, micromoles per liter; <, less than] 

Lab ID Site ID DOC

(mg/L)

Specific Ultraviolet

(Absorb/mg C/L)

B 

(mg/L)

Ba

(mg/L)

Fe

(mg/L)

H4SiO4 

(μmol/L)

Li

(mg/L)

Mn

(mg/L)

Sr

(mg/L)

Zn

(mg/L)

2103 F1-0CM 32.6 0.033 0.093 0.075 0.011 276 0.014 0.0216 2.2 <0.01

2104 F1-10CM 72.5 0.035 0.198 0.141 <0.006 572 0.021 0.0247 4 <0.01

2105 F1-20CM 111.6 0.035 0.171 0.189 <0.006 948 0.026 0.0388 4.92 <0.01

2106 F1-30CM 135.6 0.032 0.12 0.265 <0.006 1360 0.037 0.0529 6.07 <0.01

2107 F1-74CM 132.5 0.029 0.102 0.289 <0.006 1450 0.041 0.069 6.56 <0.01

2108 F4-0CM 36.5 0.032 0.092 0.064 <0.006 324 0.012 0.0714 2.51 <0.01

2109 F4-5CM 51.8 0.038 0.104 0.109 <0.006 319 0.02 0.0517 3.25 <0.01

2110 F4-10CM 55 0.035 0.11 0.115 <0.006 323 0.021 0.0488 3.43 <0.01

2111 F4-20CM 57 0.036 0.098 0.131 <0.006 302 0.021 0.051 3.79 <0.01

2112 F4-30CM 63.1 0.032 0.066 0.14 <0.006 221 0.021 0.0704 3.85 <0.01

2113 F4-40CM 63.2 0.033 0.073 0.14 <0.006 230 0.021 0.0644 3.88 <0.01

2114 U2 38.4 0.033 0.085 0.066 <0.006 206 0.016 <0.0005 2.34 <0.01

2115 U3-0CM 36.5 0.031 0.111 0.063 <0.006 231 0.014 0.0158 2.28 <0.01

2116 U3-5CM 45.9 0.036 0.122 0.101 <0.006 519 0.02 0.0961 2.99 <0.01

2117 U3-10CM 43.3 0.037 0.117 0.101 <0.006 523 0.02 0.0905 2.96 0.01

2118 U3-20CM 49.2 0.036 0.089 0.106 <0.006 457 0.021 0.0668 2.93 <0.01

2119 U3-30CM 65.6 0.033 0.038 0.111 0.248 237 0.021 0.0904 2.49 <0.01

2120 U3-40CM 58.7 0.034 0.026 0.116 2.49 227 0.021 0.166 2.26 <0.01

2121 F0-1M 37.6 0.034 0.122 0.083 0.018 341 0.015 0.0021 2.7 <0.01

2122 F0-2.5M 36.3 0.035 0.119 0.084 0.018 352 0.012 0.0067 2.7 <0.01

2123 E0-1M 38.4 0.034 0.114 0.079 0.025 324 0.011 0.0026 2.42 <0.01

2124 E0-3M 37.5 0.034 0.116 0.08 0.016 344 0.015 0.0143 2.52 <0.01

2125 S10D-1M 39 0.033 0.13 0.09 0.031 379 0.016 0.0043 2.6 <0.01

2126 S10D-1MD 38.3 0.034 0.132 0.088 0.03 383 0.018 0.0047 2.56 <0.01

2127 S10D-2M 38.7 0.003 0.13 0.089 0.025 385 0.014 0.0044 2.59 <0.01

2128 S10E-1M 27.3 0.03 0.111 0.073 0.018 323 0.012 0.0021 1.97 0.01

2129 L67-S333 23.5 0.027 0.042 0.037 0.017 114 <0.007 <0.0005 1.13 <0.01

2130 L67-S151 23.3 0.03 0.055 0.045 0.025 152 <0.007 0.0032 1.43 <0.01

Download Excel file (table5d.xlsx)
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Photograph 1. U3 sampling site in the South Florida Water Management District Water Conservation Area 

2A. (photo by M.M. Reddy).
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Photograph 2. Everglades study site location (photo by J. Tregellas)