Summary of Chemical Data from Onsite and Laboratory

Analyses of Groundwater Samples from the Surficial

Aquifer, Las Vegas, Nevada, April and August 1993 and

September 1994

Open-File Report 2012–1029

U.S. Department of the Interior

U.S. Geological Survey
Summary of Chemical Data from Onsite and Laboratory

Analyses of Groundwater Samples from the Surficial

Aquifer, Las Vegas, Nevada, April and August 1993 and

September 1994

By Michael M. Reddy and Charmaine D. Gunther

Open-File Report 2012–1029

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 chemical data from onsite and laboratory analyses of groundwater samples from the surficial aquifer, Las Vegas, Nevada, April and August 1993 and September 1994: U.S.

Geological Survey Open-File Report 2012–1029, 18 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.
iv

Contents

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

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

Data File ........................................................................................................................................................................ 1

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

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

Tables

1. Variable names and codes for documenting sample collection............................................................................... 4

2. Definitions and units for onsite and laboratory measured variables ........................................................................ 5

3. Detection limits for laboratory and onsite analyses ................................................................................................. 6

4. Summary statistics for standard reference water samples (SRWS) and distilled-water field blank (FB) and 

laboratory blank samples..................................................................................................................................... 7

5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and 

well information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); 

E, Trace constituents (Set B)............................................................................................................................. 10
1

Summary of Chemical Data from Onsite and Laboratory

Analyses of Groundwater Samples from the Surficial

Aquifer, Las Vegas, Nevada, April and August 1993 and

September 1994

By Michael M. Reddy and Charmaine D. Gunther

Abstract

This report presents a summary of data collected during April and August 1993 and September 

1994. These results are to be used as a wet-site analog to southern Nevada soils located at the Amargosa 

Desert Research Site near Beatty, Nevada. The samples were collected and analyzed in conjunction with 

the Nevada Basin and Range study unit of the U.S. Geological Survey, National Water-Quality

Assessment Program (NAWQA).

Samples were collected from groundwater wells in and about the city of Las Vegas, Nevada, and 

were analyzed for selected major, minor and trace constituents. Analyses of blank and reference samples 

are summarized as mean and standard deviation values for all positive results.

Introduction

In 1993, 33 wells were chosen in and about the city of Las Vegas, Nevada, to determine the 

effects of land use on underlying water quality. Groundwater samples collected from these wells were 

analyzed for major, minor, and trace constituents. Details of the onsite and laboratory procedures were 

adapted from previous studies and are described by Reddy and others (1989). Sample preparation, 

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

laboratory are described by Fishman and Freidman (1985) Garbarino and Taylor (1979; 1980), and 

Schroder and others (1980). Onsite procedures and equipment were adapted from a trace metal protocol 

developed by the U.S. Geological Survey National Research Program (Taylor and others, 1995). 

Sample collection and analyses were done in conjunction with the Nevada Basin and Range 

study unit of the U.S. Geological Survey, NAWQA (Emmett and others, 1993, and Clary and others, 

1994). 

Data File

Data are available from the analysis of 45 samples from 33 wells collected during 1993 and 

1994. The data file consists of 37 variables. Variable names and codes established for sample collection 

are listed in table 1. Definitions and units for onsite and laboratory measured variables are listed in 

table 2. To evaluate onsite-sampling variability, duplicate samples were collected from some wells. 

Field replicate samples were analyzed to identify variability caused by sample processing and handling. 

Paired t tests were used to assess differences due to filter pore size for each chemical species that had 
2

the adequate data. No statistically significant difference (at the 95% confidence level) was found 

between either duplicate field samples or between 0.4-μm and 0.1-μm filtered field samples for any 

chemical species. Duplicate (0.4-μm filtered) and 0.1-μm filtered samples were averaged in the final 

data file. Additional distilled-water blank samples, referred to as field blanks (FB) and laboratory blanks 

(LB), and standard reference water samples (SRWS)1 were analyzed using the same procedures as the 

onsite samples. A check on the quality of the data was provided by a verification of summary statistics 

for the data, sorted by sample location. Table 3 reports the detection limits for all chemical constituents 

included in this report. Quality-assurance/quality-control statistics are shown on table 4. During 1993 

and 1994, 45 samples were processed; analytical results are presented in table 5. 

For further information, call Michael M. Reddy at (303) 235-5941 or E-mail mreddy@usgs.gov. 

Summary 

Forty-five samples from 33 groundwater wells were analyzed using a protocol designed to 

minimize errors from handling procedures, laboratory analyses, and data-entry operations. Analyses of 

blank samples and Standard Reference Water Sample results are included.

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

Clary, S.L., McClary, D.R., Whitney,R. And Reeves, D.D., 1995, Water resources data, Nevada, water

year 1994: U.S. Geological Survey Water-Data Report NV-94-1, 768 p.

Crock, J.G., and Lichte, F.E., 1982, An improved method for the determination of trace-level arsenic 

and antimony in geological materials by automated hydride generation-atomic absorption 

spectroscopy: Analytica Chimica Acta, v. 144, p. 223–233.

Emett, D.C., Hutchinson, D.D., Jonson, N.A., O'Hair, K.L. 1993, Water resources data, Nevada, water 

year 1993: U.S. Geological Survey Water-Data Report NV-93-1, 596 p.

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 85–495, 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.

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, 14 p.

 

1 Standard Reference Water Samples are prepared and used by the U.S. Geological Survey's quality assurance program to 

ensure that the laboratory is producing analytical data for inorganic constituents that are of acceptable reliability (Schroder 

and others, 1980)
3

Skougstad, M.W., Fishman, M.J., Friedman, L.C., Erdmann, 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, book 5, chap. A1, 626 p.

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.

 Welsch, E.P., Crock, J.G., and Sanzolone, R., 1990, Trace-level determination arsenic and selenium 

using continuous-flow hydride generation atomic absorption spectrophotometry (HG-AAS): U.S. 

Geological Survey Open-File Report 90–668, p. 38–45. 

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

unstable constituents: Techniques of Water-Resources Investigation of the U.S. Geological Survey 

01–D2, 24 p. 
4

Table 1. Variable names and codes for documenting sample collection. 

Variable name Code Definition

Site ID 15-digit integer Site identification number

Site name alphanumeric string Short description of site

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

Longitude (DDDMMSS) 7-digit integer Longitude (degrees minutes seconds)

Altitude (feet) integer Altitude of top of casing, in feet

Well depth (feet) floating point Well depth from top of casing, in feet

Depth to water (feet) floating point Depth to water from top of casing, in feet

Screen interval (feet) alphanumeric string Screened interval of well from top of casing, 

in feet

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

Download Comma Separated Values (table1.csv <1k)
5

Table 2. Definitions and units for onsite and laboratory measured variables. 

Variable name Definition Units

Alkalinity (meq/L) alkalinity measured in laboratory milliequivalents per liter

As (μg/L) dissolved arsenic as As micrograms per liter

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

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

Be (mg/L) dissolved beryllium as Be milligrams per liter

Ca (meq/L) dissolved calcium as Ca milliequivalents per liter

Cd (mg/L) dissolved cadmium as Cd milligrams per liter

Cl (meq/L) dissolved chloride as Cl milliequivalents per liter

Co (mg/L) dissolved cobalt as Co milligrams per liter

Cu (mg/L) dissolved copper as Cu milligrams per liter

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

FB field blank none

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

Field dissolved oxygen (mg/L) dissolved oxygen measured onsite 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 25°C

Ion balance (%) 100% × (cations - anions) / (cations + anions) (+/-)percent

K (meq/L) dissolved potassium as K milliequivalents per liter

LB laboratory blank none

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

M106 major ion SRWS none

Mg (meq/L) dissolved magnesium as Mg milliequivalents per liter

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

Na (meq/L) dissolved sodium as Na milliequivalents per liter

Se (μg/L) dissolved selenium as Se micrograms per liter

SiO2 (mg/L) dissolved silica as SiO2 milligrams per liter

SO4 (meq/L) dissolved sulfate as SO4 milliequivalents per liter

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

SRWS Standard Reference Water Samples none

T107 trace metal SRWS none

V (mg/L) dissolved vanadium as V milligrams per liter

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

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

Download Comma Separated Values (table2.csv 2k)
6

Table 3. Detection limits for laboratory and onsite analyses. (meq/L, milliequivalents per liter; μg/L, micrograms per 

liter; mg/L, milligrams per liter) 

Constituent Units

Typical 

dilution

Detection 

limit Method of analysis

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

As (μg/L) none 2 Crock and Lichte, 1982 and Welsch and others, 1990

B (mg/L) none .002 Garbarino and Taylor, 1979, 1980

Ba (mg/L) none .001 Garbarino and Taylor, 1979, 1980

Be (mg/L) none .001 Garbarino and Taylor, 1979, 1980

Ca (meq/L) 1:10 .0005 Garbarino and Taylor, 1979, 1980

Cd (mg/L) none .01 Garbarino and Taylor, 1979, 1980

Cl (meq/L) 1:100 .2 Fishman and Friedman, 1985

Co (mg/L) None .01 Garbarino and Taylor, 1979, 1980

Cu (mg/L) None .005 Garbarino and Taylor, 1979, 1980

DO (mg/L) None .1 Wood, 1976

DOC (mg/L) None .1 Aiken, 1992

Fe (mg/L) None .005 Garbarino and Taylor, 1979, 1980

K (meq/L) 1:10 .01 Skougstad and others, 1979

Li (mg/L) none .005 Garbarino and Taylor, 1979, 1980

Mg (meq/L) 1:10 .0008 Garbarino and Taylor, 1979, 1980

Mn (mg/L) None .002 Garbarino and Taylor, 1979, 1980

Na (meq/L) 1:10 .004 Garbarino and Taylor, 1979, 1980

Se (μg/L) none 1 Crock and Lichte, 1982 and Welsch and others, 1990

SiO2 (mg/L) none .04 Garbarino and Taylor, 1979, 1980

SO4 (meq/L) 1:100 2 Fishman and Friedman, 1985

Sr (mg/L) none .001 Garbarino and Taylor, 1979, 1980

V (mg/L) none .005 Garbarino and Taylor, 1979, 1980

Zn (mg/L) none .01 Garbarino and Taylor, 1979, 1980

Download Comma Separated Values(table3.csv 1k)
7

Table 4. Summary statistics for standard reference water samples (SRWS) and distilled-water field blank (FB) and laboratory blank samples. 

(meq/L, milliequivalents per liter; μg/L, micrograms per liter; mg/L, milligrams per liter; N/A, not applicable; FB, field blank; LB, laboratory 

blank).—Continued

Range

Number of

samples

Expected value

(Schroder and others 1980)

Constituent Sample Units

Mean of 

reported 

values

Standard 

deviation Minimum Maximum

Less than

detection N

95% 

confidence 

MPV

Standard 

deviation N

Alkalinity FB (meq/L) -0.03 0.05 -0.106 -0.001 0 4

LB (meq/L) -.002 .0013 -.004 -.001 0 6

M106 (meq/L) .112 .001 .109 .114 0 12 .16 ± 0 .022 55

As FB (μg/L) <2 N/A <2 <2 4 4

T107 (μg/L) 11 .8 10 12 0 4 1.8 ± 1 2.1 57

B FB (mg/L) <.002 N/A <.002 <.002 2 2

LB (mg/L) .003 N/A .003 .003 13 14

M106 (mg/L) .042 .047 .011 .178 1 17 .044 ± 0 .037 18

T107 (mg/L) .125 .014 .092 .149 0 18 .13 ± 0 .021 37

Ba FB (mg/L) <.001 N/A <.001 <.001 2 2

LB (mg/L) .002 0 .002 .002 11 14

T107 (mg/L) .189 .014 .157 .209 0 18 .192 ± 0 .011 53

Be FB (mg/L) <.001 N/A <.001 <.001 2 2

LB (mg/L) .002 .001 .001 .003 9 14

T107 (mg/L) .01 .004 .003 .016 1 18 .011 ± 0 .0011 34

Ca FB (meq/L) .0016 N/A .0016 .0016 1 2

LB (meq/L) .0006 .0003 .0001 .001 4 14

M106 (meq/L) .45 .03 .41 .51 0 17 .45 ± 0 .02 62

T107 (meq/L) .57 .04 .47 .63 0 18 .584 ± 0 .03 60

Cd FB (mg/L) <.01 N/A <.01 <.01 2 2

LB (mg/L) .014 .005 .01 .021 10 14

T107 (mg/L) .014 .004 .01 .025 5 18 .0143 ± 0 .0021 70

Cl FB (meq/L) .05 .09 .001 .188 0 4

LB (meq/L) .003 .002 .002 .004 66 68
8

Table 4. Summary statistics for standard reference water samples (SRWS) and distilled-water field blank (FB) and laboratory blank samples. 

(meq/L, milliequivalents per liter; μg/L, micrograms per liter; mg/L, milligrams per liter; N/A, not applicable; FB, field blank; LB, laboratory 

blank).—Continued

 Number of Expected value

 

Range samples (Schroder and others 1980)

Mean of 95% 

reported Standard Less than confidence Standard 

Constituent Sample Units values deviation Minimum Maximum detection N MPV deviation N

M106 (meq/L) .39 .03 .32 .423 0 12 .37 ± 0 .034 68

Co FB (mg/L) <.01 N/A <.01 <.01 2 2

LB (mg/L) <.01 N/A <.01 <.01 14 14

T107 (mg/L) .014 .003 .011 .019 6 18 .011 ± 0 .0014 34

Cu FB (mg/L) <.005 N/A <.005 <.005 2 2

LB (mg/L) .017 0 .017 .017 12 14

T107 (mg/L) .026 .007 .011 .035 0 18 .03 ± 0 .0023 73

Fe FB (mg/L) <.005 N/A <.005 <.005 2 2

LB (mg/L) .02 .008 .012 .029 6 14

T107 (mg/L) .04 .028 .012 .102 1 18 .052 ± 0 .007 68

K FB (meq/L) .02 .02 .002 .031 2 6

M106 (meq/L) .017 .003 .014 .023 0 5 .02 ± 0 .003 58

T107 (meq/L) .023 .004 .019 .028 0 4 .021 ± 0 .0038 62

Li FB (mg/L) <.005 N/A <.005 <.005 2 2

LB (mg/L) <.005 N/A <.005 <.005 14 14

T107 (mg/L) .18 .03 .1 .244 0 18 .193 ± 0 .014 21

Mg FB (meq/L) .0002 N/A .0002 .0002 1 2

LB (meq/L) .0009 .0008 .0001 .0032 1 14

M106 (meq/L) .282 .013 .253 .301 0 17 .29 ± 0 .02 62

T107 (meq/L) .168 .01 .139 .179 0 18 .173 ± 0 .011 61

Mn FB (mg/L) <.002 N/A <.002 <.002 2 2

LB (mg/L) <.002 N/A <.002 <.002 14 14

T107 (mg/L) .047 .003 .039 .052 0 18 .045 ± 0 .006 68

Na FB (meq/L) .005 N/A .005 .005 1 2
9

LB (meq/L) .0011 .0011 .0005 .004 4 14

M106 (meq/L) .38 .07 .22 .509 1 17 .4 ± 0 .02 65

T107 (meq/L) .8 .2 .423 1.11 0 18 .9 ± 0 .048 65

Se FB (μg/L) <1 N/A <1 <1 4 4

T107 (μg/L) 13 .8 12 14 0 4 11 ± 1 1.9 54

SiO2 FB (mg/L) <.04 N/A <.04 <.04 2 2

LB (mg/L) <.04 N/A <.04 <.04 14 14

M106 (mg/L) 4 1 2.7 7.1 0 17 3.4 ± 0 .2 40

T107 (mg/L) 7.6 1 5.25 9.15 0 18 7.7 ± 0 .5 43

SO4 FB (meq/L) .289 .001 .288 .289 2 4

LB (meq/L) .03 N/A .03 .03 67 68

M106 (meq/L) .583 .003 .579 .586 6 12 .575 ± 0 .035 61

Sr FB (mg/L) <.001 N/A <.001 <.001 2 2

LB (mg/L) .0011 .0001 .001 .001 11 14

M106 (mg/L) .16 .04 .019 .194 0 17 .177 ± 0 .009 22

T107 (mg/L) .059 .005 .046 .068 0 18 .061 ± 0 .004 29

V FB (mg/L) <.005 N/A <.005 <.005 2 2

LB (mg/L) <.005 N/A <.005 <.005 14 14

M106 (mg/L) .0063 .0011 .005 .008 13 17 .0044 ± 0 .0018 4

T107 (mg/L) .014 .003 .007 .018 0 18 .014 ± 0 .0028 29

Zn FB (mg/L) .01 N/A .01 .01 1 2

LB (mg/L) .03 .01 .02 .04 8 14

T107 (mg/L) .08 .02 .04 .13 0 18 .0758 ± 0 .0099 68

Download Comma Separated Values (table4.csv 4k) 

Table 4. Summary statistics for standard reference water samples (SRWS) and distilled-water field blank (FB) and laboratory blank samples. 

(meq/L, milliequivalents per liter; μg/L, micrograms per liter; mg/L, milligrams per liter; N/A, not applicable; FB, field blank; LB, laboratory 

blank).—Continued

Number of Expected value

Range samples (Schroder and others 1980)

 Mean of 95% 

reported Standard Less than confidence Standard 

Constituent Sample Units values deviation Minimum Maximum detection N MPV deviation N
10

Table 5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and well 

information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); E, Trace constituents (Set 

B). (D, degrees; M, minutes; S, seconds; mg/L, milligrams per liter; std, standard deviation; μS/cm, microseimens 

per centimeter; oC, degrees Celsius; meq/L, milliequivalents per liter; μg/L, micrograms per liter; NS, not 

sampled).—Continued

Table 5A, Site locations and well information

Site ID Site name

Latitude

(DDMMSS)

Longitude

(DDDMMSS)

Altitude

(feet)

Well

depth

(feet)

Screen

interval

(feet)

3.60837E+14 4th&CLARK 360955 1150836 2,010 22 '18–22'

3.60832E+14 BLM 360559 1145827 1,590 80 '76–80'

3.60908E+14 BROADBENT 360908 1151224 2,209 27 '22–27'

3.60621E+14 C27 360621 1150559 1,938 30 '24–30'

3.60521E+14 C28 360521 1150422 1,803 19 '14–19'

3.60605E+14 C33 360605 1150525 1,912 24 '19–24'

3.60647E+14 C49 360647 1150440 1,780 25 '20–25'

3.61212E+14 CARI15 361212 1150659 1,910 46 '43–46'

3.6093E+14 CHAR-8 360930 1150834 2,008 25 '21–25'

3.61425E+14 CRAI15 361425 1150619 1,919 84 '80–84'

3.60744E+14 DIT 360718 1150405 1,730 11 '7–11'

3.60547E+14 DORIS1 360547 1150528 1,919 29 '24–29'

3.6064E+14 EA&R 360640 1150704 1,948 20 '10–15'

3.60535E+14 HAC&ANN 360535 1150509 1,872 18 '14–18'

3.60537E+14 HAC&LAKEW 360537 1150537 1,912 23 '17–23'

3.60924E+14 HUNTPK 360924 1150811 1,990 15 '11–15'

3.60924E+14 HUNTPK2 360924 1150811 1,990 17 '12–17'

3.60852E+14 HWYSHR1 360852 1150609 1,825 25 '20–25'

3.60838E+14 I15SAH 360838 1151018 2,075 24 '21–24'

3.60735E+14 I15SPRING 360735 1151052 2,120 45 '41–45'

3.61102E+14 JGAYPK1 361102 1150836 2,010 15 '11–15'

3.61102E+14 JGAYPK2 361102 1150836 2,010 33 '28–33'

3.61053E+14 LV-MGOLF 361053 1151158 2,190 33 '27–31'

3.61014E+14 MDB-6 361014 1151117 2,140 40 '20–40'

3.60601E+14 NELLIS† 360601 1150344 1,720 500† 500†

3.60522E+14 P.P.VISTA 360522 1150721 2,010 30 '26–30'

3.60617E+14 P.PARK1 360617 1150638 1,950 24 '20–24'

3.60617E+14 P.PARK2 360617 1150638 1,958 30 '25–30'

3.60937E+14 ROT1 360937 1151134 2,155 35 '30–35'

3.60937E+14 ROT2 360937 1151134 2,158 18 '14–18'

3.60648E+14 SNSC 360648 1150849 2,030 15 '10–15'

3.60401E+14 USGSOS 360401 1150823 2,086 60 '55–60'

3.60921E+14 WALLI15 360921 1150936 2,047 17 '13–14'

† The NELLIS well is an artesian well

Download Comma Separated Values (table5a.csv 2k)
11

Table 5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and well 

information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); E, Trace constituents (Set 

B). (D, degrees; M, minutes; S, seconds; mg/L, milligrams per liter; std, standard deviation; μS/cm, microseimens 

per centimeter; oC, degrees Celsius; meq/L, milliequivalents per liter; μg/L, micrograms per liter; NS, not 

sampled).—Continued

Table 5B, Field Parameters

Site ID Site name

Collection

date

Depth to

water

(feet)

Field

dissolved

oxygen

(mg/L)

Field

pH

(std units)

Field

specific

conductivity

(μS/cm)

Water

temp

(oC)

3.60837E+14 4th & CLARK 8/21/1993 7.7 1.7 7.02 3100 23.6

3.60832E+14 BLM 4/16/1993 11.2 5.7 7.36 9290 25.6

8/18/1993 10.5 0.2 7.7 11200 25.2

3.60908E+14 BROADBENT 8/24/1993 18 3.5 7.12 2900 23

3.60621E+14 C27 8/24/1993 17.9 0.9 7 5950 22

3.60521E+14 C28 8/19/1993 7.8 0.7 7.1 5400 27.3

3.60605E+14 C33 8/19/1993 18.2 2.3 7 6040 24

3.60647E+14 C49 8/21/1993 9.5 2.7 6.99 3650 23.3

3.61212E+14 CARI15 4/14/1993 27.6 2.5 7.33 575 24.9

8/22/1993 27.4 3.6 7.44 598 23.1

3.6093E+14 CHAR-8 8/22/1993 11.9 NS 6.89 3400 23

3.61425E+14 CRAI15 8/20/1993 62.6 5.9 7.6 1390 25

3.60744E+14 DIT 4/16/1993 5.3 2 6.98 5490 16.4

8/18/1993 8.3 2.1 6.94 5530 24.6

9/13/1994 8.4 2.6 6.98 5250 21.9

3.60547E+14 DORIS1 8/20/1993 16.2 3.5 7.18 4650 21.9

3.6064E+14 EA&R 8/20/1993 9 1.6 6.88 4490 21.6

3.60535E+14 HAC & ANN 8/19/1993 6.2 2.7 7.1 5570 23.9

3.60537E+14 HAC & LAKEW 8/19/1993 10.3 3.2 7.07 5600 21.2

3.60924E+14 HUNTPK 8/22/1993 7.1 2.9 7.48 2970 22.9

9/14/1994 7.1 2.7 7.14 3000 20.9
12

3.60924E+14 HUNTPK2 9/14/1994 7.2 2.6 7.17 3020 20

3.60852E+14 HWYSHR1 8/20/1993 6.9 0.4 7.05 5550 24.2

3.60838E+14 I15SAH 4/14/1993 6.7 1.8 7.36 2700 21.9

8/18/1993 7 3.1 7.2 2930 24.8

3.60735E+14 I15SPRING 4/13/1993 8.8 4.1 7.01 3310 23.3

8/18/1993 8.7 3.9 7 3470 23.4

3.61102E+14 JGAYPK1 8/23/1993 9.2 0.4 7.07 2390 21.5

3.61102E+14 JGAYPK2 8/23/1993 10 0.5 7.23 2160 20.8

3.61053E+14 LV-MGOLF 8/22/1993 9.6 3 7.28 1600 20

3.61014E+14 MDB-6 4/13/1993 8 3.8 10.8 1190 20.3

8/23/1993 12.5 NS 10.2 1290 21

3.60601E+14 NELLIS† 4/16/1993 -63.0† 4.6 7.28 586 24.2

9/13/1994 -62.0† 4.2 7.78 622 24.6

3.60522E+14 P.P.VISTA 8/21/1993 16.8 4.3 6.99 2540 20.6

3.60617E+14 P.PARK1 4/12/1993 11.9 NS 7.06 5000 18.7

8/17/1993 13.8

13.6

8.1

9.5

8.9

8.4

30

7.8

NS

2

0.2

1.2

0.2

1.6

3.9

1.6

8/17/1993

8/17/1993

4/15/1993

8/17/1993

8/23/1993

8/16/1993

4/13/1993

7.32 4920 23

3.60617E+14 P.PARK2 7.06 4810 20.8

3.60937E+14 ROT1 5.8 2300 18.5

3.60937E+14 ROT2 6.74 5530 16.8

6.66 5320 19.6

3.60648E+14 SNSC 6.95 4050 24.5

3.60401E+14 USGSOS 6.74 1830 23.2

3.60921E+14 WALLI15 6.76 4200 21

8/21/1993 8.7 2 6.85 4650 22.6

† The NELLIS well is an artesian well

Download Comma Separated Values (table5b.csv 2k)

Table 5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and well 

information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); E, Trace constituents (Set 

B). (D, degrees; M, minutes; S, seconds; mg/L, milligrams per liter; std, standard deviation; μS/cm, microseimens 

per centimeter; oC, degrees Celsius; meq/L, milliequivalents per liter; μg/L, micrograms per liter; NS, not 

sampled).—Continued

Table 5B, Field Parameters

Field Field

Depth to dissolved Field specific Water

Collection water oxygen pH conductivity temp

Site ID Site name date (feet) (mg/L) (std units) (μS/cm) (oC)
13

Table 5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and well 

information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); E, Trace constituents (Set 

B). (D, degrees; M, minutes; S, seconds; mg/L, milligrams per liter; std, standard deviation; μS/cm, microseimens 

per centimeter; oC, degrees Celsius; meq/L, milliequivalents per liter; μg/L, micrograms per liter; NS, not 

sampled).—Continued

Table 5C, Major ion chemistry 

Site ID Site name

Collection

date

Alkalinity

(meq/L)

Cl

(meq/L)

SO4

(meq/L)

Ca

(meq/L)

Mg

(meq/L)

Na

(meq/L)

K 

(meq/L)

Ion

balance

(%)

3.6084E+14 4th & CLARK 8/21/1993 6.24 5.2 29 10.7 21.4 6.89 0.83 -0.77

3.6083E+14 BLM 4/16/1993 1.33 36.3 73 26.7 42.7 49.3 2.8 4.68

8/18/1993 1.79 50.4 94 26.6 47.2 56.1 2.23 -5.05

3.6091E+14 BROADBENT 8/24/1993 5.06 5.4 27 12.9 17.5 7.36 0.33 0.83

3.6062E+14 C27 8/24/1993 4.19 7.2 78 24.8 43.5 18.1 0.94 -1.16

3.6052E+14 C28 8/19/1993 4.61 28.6 48 22.9 22.3 19.9 1.16 -10.14

3.6061E+14 C33 8/19/1993 4.01 13.6 73 23.4 33.2 17.6 1.44 -9

3.6065E+14 C49 8/21/1993 4.17 8.8 37 15.4 15.5 10.1 0.79 -8.91

3.6121E+14 CARI15 4/14/1993 4.66 0.3 <2 3.35 3.01 0.37 0.06 15.57

8/22/1993 4.81 0.4 <2 3.19 2.85 0.346 0.08 10.76

3.6093E+14 CHAR-8 8/22/1993 5.67 5.7 35 17.1 24.8 7.11 0.69 3.47

3.6143E+14 CRAI15 8/20/1993 3.67 4.8 7 3.71 9.92 0.566 0.09 -3.98

3.6074E+14 DIT 4/16/1993 5.18 14.1 48 25.6 28.2 17.8 1.71 4.29

8/18/1993 5.35 14.8 58 23.8 26.9 14.5 1.86 -7.64

9/13/1994 5.31 13.5 45 23.9 26.9 19 1.55 5.58

3.6055E+14 DORIS1 8/20/1993 3.06 10.4 49 21.6 28.1 9.05 0.92 -2.28

3.6064E+14 EA&R 8/20/1993 4.84 7.9 45 26.7 21.6 14.5 0.77 4.81

3.6054E+14 HAC&ANN 8/19/1993 3.68 14.5 62 26.9 29.2 18.2 0.85 -3.24

3.6054E+14 HAC&LAKEW 8/19/1993 3.43 14.7 58 26.7 33 16.6 1.14 0.85

3.6092E+14 HUNTPK 8/22/1993 4.24 5.8 30 11.4 19.4 6.49 0.54 -2.84

9/14/1994 4.05 5.3 25 12.4 20.9 7.74 0.41 9.37

3.6092E+14 HUNTPK2 9/14/1994 3.87 5.5 26 12.2 20.4 7.61 0.41 6.91
14

3.6085E+14 HWYSHR1 8/20/1993 4.67 12.1 52 21.8 27.7 22.7 1.33 3.35

3.6084E+14 I15SAH 4/14/1993 3.67 4.5 19 13.4 16.3 7.36 0.75 16.37

8/18/1993 3.9 6.4 27 11.4 14.7 6.13 0.9 -5.92

3.6074E+14 I15SPRING 4/13/1993 3.87 6.3 28 16.2 18.9 8.65 0.45 7.32

8/18/1993 3.95 7 34 17.4 18.4 10.3 0.42 1.72

3.611E+14 JGAYPK1 8/23/1993 6.11 4.7 15 7.99 11.6 4.98 0.81 -0.84

3.611E+14 JGAYPK2 8/23/1993 5.04 4.2 15 5.19 11.3 4.48 0.52 -6.01

3.6105E+14 LV-MGOLF 8/22/1993 4.35 3.8 9 8.47 8.94 2.16 0.14 6.95

3.6101E+14 MDB-6 4/13/1993 0.89 1.7 5 8.66 0.317 2.94 0.3 23.36

8/23/1993 0.833 2.8 10 9.4 0.0295 1.99 0.34 -7.38

3.606E+14 NELLIS 4/16/1993 3.05 0.2 3 1.88 1.99 2.61 0.17 3.1

9/13/1994 3.05 0.4 3 1.99 2.07 2.77 0.23 4.52

3.6052E+14 P.P.VISTA 8/21/1993 3.76 7.4 35 20.4 17.1 11.1 0.49 3.08

3.6062E+14 P.PARK1 4/12/1993 3.85 7.8 50 22.9 28.3 17.5 0.74 5.94

8/17/1993 3.86 8.2 58 23.6 27.4 17.6 0.61 -0.61

3.6062E+14 P.PARK2 8/17/1993 3.82 6.7 50 23.3 25.9 17.9 0.63 5.62

3.6094E+14 ROT1 8/17/1993 7.68 3.5 17 9.2 13.3 6.23 0.21 1.33

3.6094E+14 ROT2 4/15/1993 8.82 13.8 44 18.1 38.8 20.7 1.12 8.33

8/17/1993 8.88 13.1 43 16.3 34.7 16.3 0.88 2.4

3.6065E+14 SNSC 8/23/1993 5.03 6.4 44 25.1 21.3 11.4 0.81 2.79

3.604E+14 USGSOS 8/16/1993 3.16 2.1 16 12.2 8.61 2.26 0.23 4.58

3.6092E+14 WALLI15 4/13/1993 6.21 6.7 46 21.8 34.5 10.2 1.05 6.83

8/21/1993 6.07 6.7 50 22.4 33.6 9.24 1.14 2.8

Download Comma Separated Values (table5c.csv3k)

Table 5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and well 

information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); E, Trace constituents (Set 

B). (D, degrees; M, minutes; S, seconds; mg/L, milligrams per liter; std, standard deviation; μS/cm, microseimens 

per centimeter; oC, degrees Celsius; meq/L, milliequivalents per liter; μg/L, micrograms per liter; NS, not 

sampled).—Continued

Table 5C, Major ion chemistry 

Ion

Collection Alkalinity Cl SO4 Ca Mg Na K balance

Site ID Site name date (meq/L) (meq/L) (meq/L) (meq/L) (meq/L) (meq/L) (meq/L) (%)
15

Site ID Site name

Collection

date

DOC

(mg/L)

B

(mg/L)

Ba

(mg/L)

Be

(mg/L)

Cd

(mg/L)

Co

(mg/L)

Cu

(mg/L)

Fe

(mg/L)

3.60837E+14 4th & CLARK 8/21/1993 2 0.523 0.012 <0.001 <0.01 <0.01 <0.005 <0.005

3.60832E+14 BLM 4/16/1993 1.9 4.21 .011 .002 <.01 <.01 .006 <.005

8/18/1993 1.8 4.38 .01 <.001 <.01 <.01 <.005 <.005

3.60908E+14 BROADBENT 8/24/1993 3.1 .936 .017 <.001 <.01 <.01 <.005 .047

3.60621E+14 C27 8/24/1993 2.7 1.82 .007 <.001 <.01 <.01 <.005 .012

3.60521E+14 C28 8/19/1993 1 1.29 .014 <.001 <.01 <.01 <.005 .012

3.60605E+14 C33 8/19/1993 3.7 3.61 .012 <.001 <.01 <.01 <.005 <.005

3.60647E+14 C49 8/21/1993 1.7 1.25 .012 <.001 <.01 <.01 <.005 <.005

3.61212E+14 CARI15 4/14/1993 1.5 .046 .201 <.001 <.01 <.01 <.005 .34

8/22/1993 .6 .035 .181 .002 <.01 <.01 <.005 <.005

3.6093E+14 CHAR-8 8/22/1993 2.9 .518 .013 <.001 <.01 <.01 <.005 <.005

3.61425E+14 CRAI15 8/20/1993 5.8 .032 .178 <.001 <.01 <.01 <.005 <.005

3.60744E+14 DIT 4/16/1993 3.7 2.02 .016 <.001 <.01 <.01 <.005 .013

8/18/1993 3.4 1.51 .01 <.001 <.01 <.01 <.005 .035

9/13/1994 3.2 4.02 .014 <.001 <.01 <.01 <.005 .07

3.60547E+14 DORIS1 8/20/1993 1.8 2.55 .008 <.001 <.01 <.01 <.005 <.005

3.6064E+14 EA&R 8/20/1993 3.9 1.55 .01 <.001 <.01 <.01 <.005 <.005

3.60535E+14 HAC&ANN 8/19/1993 1.7 2.3 .008 <.001 <.01 <.01 <.005 <.005

3.60537E+14 HAC&LAKEW 8/19/1993 1.5 1.95 .008 <.001 <.01 <.01 <.005 <.005

3.60924E+14 HUNTPK 8/22/1993 20 .357 .023 <.001 <.01 <.01 <.005 .082

9/14/1994 1.45 .993 .028 <.001 <.01 <.01 <.005 <.005

Table 5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and well 

information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); E, Trace constituents (Set 

B). (D, degrees; M, minutes; S, seconds; mg/L, milligrams per liter; std, standard deviation; μS/cm, microseimens 

per centimeter; oC, degrees Celsius; meq/L, milliequivalents per liter; μg/L, micrograms per liter; NS, not 

sampled).—Continued

Table 5D, Trace constituents (Set A)
16

3.60924E+14 HUNTPK2 9/14/1994 1.3 .919 .017 <.001 <.01 <.01 <.005 <.005

3.60852E+14 HWYSHR1 8/20/1993 3.1 1.96 .027 <.001 <.01 <.01 <.005 .529

3.60838E+14 I15SAH 4/14/1993 3.1 .95 .038 <.001 <.01 <.01 <.005 .863

8/18/1993 1.9 .783 .017 <.001 <.01 <.01 <.005 <.005

3.60735E+14 I15SPRING 4/13/1993 1.9 1.22 .014 <.001 <.01 <.01 <.005 <.005

8/18/1993 1.6 .711 .009 <.001 <.01 <.01 <.005 <.005

3.61102E+14 JGAYPK1 8/23/1993 2.3 .714 .031 <.001 <.01 <.01 <.005 <.005

3.61102E+14 JGAYPK2 8/23/1993 1.5 .597 .017 <.001 <.01 <.01 <.005 <.005

3.61053E+14 LV-MGOLF 8/22/1993 1.6 .094 .043 <.001 <.01 <.01 <.005 <.005

3.61014E+14 MDB-6 4/13/1993 1.7 .2 .047 <.001 <.01 <.01 .016 <.005

8/23/1993 1.2 .202 .039 <.001 <.01 <.01 <.005 <.005

3.60601E+14 NELLIS 4/16/1993 .5 .258 .032 <.001 <.01 <.01 <.005 .046

9/13/1994 .6 .501 .041 <.001 <.01 <.01 <.005 <.005

3.60522E+14 P.P.VISTA 8/21/1993 2.3 .707 .016 <.001 <.01 <.01 <.005 .035

3.60617E+14 P.PARK1 4/12/1993 3.1 2.19 .011 <.001 <.01 <.01 <.005 .02

8/17/1993 2.7 1.79 .008 <.001 <.01 <.01 <.005 <.005

3.60617E+14 P.PARK2 8/17/1993 2.1 1.97 .011 .001 <.01 <.01 <.005 <.005

3.60937E+14 ROT1 8/17/1993 2.5 .75 .017 <.001 <.01 <.01 <.005 .094

3.60937E+14 ROT2 4/15/1993 16 .631 .036 .002 <.01 <.01 .015 .007

8/17/1993 14.6 .463 .028 <.001 <.01 <.01 <.005 .035

3.60648E+14 SNSC 8/23/1993 4.3 1.2 .014 <.001 <.01 <.01 <.005 <.005

3.60401E+14 USGSOS 8/16/1993 .5 .196 .01 <.001 <.01 <.01 <.005 <.005

3.60921E+14 WALLI15 4/13/1993 3.4 1.91 .022 <.001 <.01 <.01 <.005 <.005

8/21/1993 3.5 1.67 .021 <.001 <.01 <.01 <.005 <.005

Download Comma Separated Values (table5d.csv 3k)

Table 5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and well 

information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); E, Trace constituents (Set 

B). (D, degrees; M, minutes; S, seconds; mg/L, milligrams per liter; std, standard deviation; μS/cm, microseimens 

per centimeter; oC, degrees Celsius; meq/L, milliequivalents per liter; μg/L, micrograms per liter; NS, not 

sampled).—Continued 

Table 5D, Trace constituents (Set A)

Collection DOC B Ba Be Cd Co Cu Fe

Site ID Site name date (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L)
17

Table 5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and well 

information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); E, Trace constituents (Set 

B). (D, degrees; M, minutes; S, seconds; mg/L, milligrams per liter; std, standard deviation; μS/cm, microseimens 

per centimeter; oC, degrees Celsius; meq/L, milliequivalents per liter; μg/L, micrograms per liter; NS, not 

sampled).—Continued

Table 5E, Trace constituents (Set B)

Site ID Site name

Collection

date

Li

(mg/L)

Mn

(mg/L)

SiO2

(mg/L)

Sr

(mg/L)

V 

(mg/L)

Zn

(mg/L)

As

(μg/L)

Se

(μg/L)

3.60837E+14 4th & CLARK 8/21/1993 0.105 0.003 42.3 5.64 <0.005 <0.01 NS NS

3.60832E+14 BLM 4/16/1993 1.11 .008 19.1 12.4 <.005 <.01 14 34

8/18/1993 .578 .006 11.5 10.1 .032 .23 35 44

3.60908E+14 BROADBENT 8/24/1993 .051 .011 18.5 2.12 <.005 <.01 NS NS

3.60621E+14 C27 8/24/1993 .183 .004 21.9 5.56 <.005 <.01 NS NS

3.60521E+14 C28 8/19/1993 .374 .006 46.1 7.01 <.005 .03 NS NS

3.60605E+14 C33 8/19/1993 .279 .006 25.2 7.15 <.005 <.01 NS NS

3.60647E+14 C49 8/21/1993 .215 <.002 34.3 7.55 <.005 <.01 NS NS

3.61212E+14 CARI15 4/14/1993 .014 .038 25.5 .794 <.005 <.01 2 1

8/22/1993 .012 .004 21.3 .708 <.005 <.01 2 2

3.6093E+14 CHAR-8 8/22/1993 .047 .041 28.6 5.36 <.005 .02 NS NS

3.61425E+14 CRAI15 8/20/1993 .018 .019 47.5 2.17 .007 <.01 NS NS

3.60744E+14 DIT 4/16/1993 .234 .039 56.4 11.6 <.005 <.01 NS NS

8/18/1993 .137 .008 43.1 8.91 .007 <.01 NS NS

9/13/1994 .248 .047 66.7 11 <.005 <.01 NS NS

3.60547E+14 DORIS1 8/20/1993 .163 .003 23.9 5.99 <.005 <.01 NS NS

3.6064E+14 EA&R 8/20/1993 .193 .002 61.9 9 <.005 <.01 NS NS

3.60535E+14 HAC&ANN 8/19/1993 .187 .005 31.3 7.3 <.005 <.01 NS NS

3.60537E+14 HAC&LAKEW 8/19/1993 .178 <.002 34.6 6.82 <.005 <.01 NS NS
18

3.60924E+14 HUNTPK 8/22/1993 .037 .007 17.5 2.51 <.005 .01 NS NS

9/14/1994 .064 <.002 27 3.15 <.005 .13 NS NS

3.60924E+14 HUNTPK2 9/14/1994 .064 <.002 27.5 3.13 <.005 <.01 NS NS

3.60852E+14 HWYSHR1 8/20/1993 .149 .095 55.5 6.12 <.005 .04 NS NS

3.60838E+14 I15SAH 4/14/1993 .075 .039 28.7 3.2 <.005 <.01 NS NS

8/18/1993 .067 <.002 20.8 2.84 <.005 <.01 NS NS

3.60735E+14 I15SPRING 4/13/1993 .076 <.002 22 4.52 <.005 .03 NS NS

8/18/1993 .038 <.002 14.2 3.1 <.005 <.01 NS NS

3.61102E+14 JGAYPK1 8/23/1993 .052 .121 40.4 5.05 <.005 <.01 NS NS

3.61102E+14 JGAYPK2 8/23/1993 .029 .01 23.8 2.23 <.005 .02 NS NS

3.61053E+14 LV-MGOLF 8/22/1993 .013 <.002 16.9 1.21 <.005 <.01 2 12

3.61014E+14 MDB-6 4/13/1993 .025 <.002 14.1 1.24 .01 <.01 NS NS

8/23/1993 .018 <.002 14.3 1.14 .007 <.01 NS NS

3.60601E+14 NELLIS 4/16/1993 .137 <.002 21.1 .788 .009 <.01 10 1

9/13/1994 .12 <.002 23.3 .793 <.005 .12 NS NS

3.60522E+14 P.P.VISTA 8/21/1993 .061 .118 17.9 4.44 <.005 .02 NS NS

3.60617E+14 P.PARK1 4/12/1993 .187 .004 31.2 7.61 <.005 <.01 10 33

8/17/1993 .162 .004 28.4 6.49 <.005 <.01 10 34

3.60617E+14 P.PARK2 8/17/1993 .172 .008 31.2 7.11 <.005 <.01 NS NS

3.60937E+14 ROT1 8/17/1993 .024 .015 20.5 1.41 <.005 .02 NS NS

3.60937E+14 ROT2 4/15/1993 .104 .234 31.1 8.11 <.005 <.01 3 10

8/17/1993 .059 .227 24.2 5.9 <.005 .02 <2 8

3.60648E+14 SNSC 8/23/1993 .173 .232 63.9 8.01 <.005 <.01 NS NS

3.60401E+14 USGSOS 8/16/1993 .052 <.002 18.5 2.61 <.005 <.01 NS NS

3.60921E+14 WALLI15 4/13/1993 .141 .002 47.9 9.81 <.005 <.01 NS NS

8/21/1993 .133 .012 42.2 8.67 <.005 <.01 NS NS

Download Comma Separated Values (table5e.csv 3k)

Table 5. Chemical data for groundwater samples from the surficial aquifer, Las Vegas, Nev. A, Site locations and well 

information; B, Field parameters; C, Major ion chemistry; D, Trace constituents (Set A); E, Trace constituents (Set 

B). (D, degrees; M, minutes; S, seconds; mg/L, milligrams per liter; std, standard deviation; μS/cm, microseimens 

per centimeter; oC, degrees Celsius; meq/L, milliequivalents per liter; μg/L, micrograms per liter; NS, not 

sampled).—Continued

Table 5E, Trace constituents (Set B) 

Collection Li Mn SiO2 Sr V Zn As Se

Site ID Site name date (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (μg/L) (μg/L)