USGS

Water Quality in the Las Vegas Valley Area and Carson and Truckee River Basins, Nevada and California, 1992-96

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The following tables summarize data collected for NAWQA studies from 1992-95 by showing results for the Nevada Basin and Range Study Unit compared to the NAWQA national range for each compound detected. The data were collected at a wide variety of places and times. In order to represent the wide concentration ranges observed among Study Units, logarithmic scales are used to emphasize the general magnitude of concentrations (such as 10, 100, or 1,000), rather than the precise number. The complete dataset used to construct these tables is available upon request.

Concentrations of herbicides, insecticides, volatile organic compounds, and nutrients detected in ground and surface waters of the Nevada Basin and Range Study Unit. [mg/L, milligrams per liter; µg/L, micrograms per liter; pCi/L, picocuries per liter; %, percent; <, less than; - -, not measured]

occurrence table part 1

occurrence tables part 2



Herbicides, insecticides, volatile organic compounds, and nutrients not detected in ground and surface waters of the Nevada Basin and Range Study Unit.
 

Herbicides

2,4,5-T 
2,4,5-TP 
2,4-DB 
2,6-Diethylaniline (Metabolite of Alachlor) 
Acifluorfen 
Benfluralin 
Bentazon 
Bromoxynil 
Butylate 
Chloramben 
Clopyralid 
Dacthal mono-acid (Dacthal metabolite) 
Dicamba 
Dinoseb 
Ethalfluralin 
Fenuron 
Fluometuron 
MCPA 
MCPB 
Molinate 
Napropamide 
Neburon 
Norflurazon 
Picloram 
Pronamide 
Propachlor 
Propanil 
Propham 
Thiobencarb 
Triallate 
Triclopyr 

Insecticides

3-Hydroxycarbofuran (Carbofuran metabolite) 
Aldicarb sulfoxide (Aldicarb metabolite) 
Aldicarb 
Azinphos-methyl 
Disulfoton 
Ethoprop 
gamma-HCH 
Methiocarb 
Methyl parathion 
Oxamyl 
Parathion 
Phorate 
Propargite 
Propoxur 
Terbufos 
cis-Permethrin 
 

Volatile organic compounds

1,1,1,2-Tetrachloroethane 
1,1,2,2-Tetrachloroethane 
1,1,2-Trichloroethane 
1,1-Dichloroethane 
1,1-Dichloropropene 
1,2,3-Trichlorobenzene 
1,2,3-Trichloropropane 
1,2,4-Trichlorobenzene 
1,2,4-Trimethylbenzene 
1,2-Dibromo-3-chloropropane 
1,2-Dibromoethane 
1,2-Dichloropropane 
1,3,5-Trimethylbenzene 
1,3-Dichlorobenzene 
1,3-Dichloropropane 
1,4-Dichlorobenzene 
1-Chloro-2-methylbenzene 
1-Chloro-4-methylbenzene 
2,2-Dichloropropane 
Bromobenzene 
Bromomethane 
Chlorobenzene 
Chloroethane 
Chloroethene 
Chloromethane 
Dimethylbenzenes 
Ethenylbenzene 
Ethylbenzene 
Hexachlorobutadiene 
Isopropylbenzene 
Methylbenzene 
Naphthalene 
Tetrachloromethane 
cis-1,2-Dichloroethene 
cis-1,3-Dichloropropene 
n-Butylbenzene 
n-Propylbenzene 
p-Isopropyltoluene 
sec-Butylbenzene 
tert-Butylbenzene 
trans-1,3-Dichloropropene 
 

Nutrients

No non-detects



Concentrations of semivolatile organic compounds, organochlorine compounds, and trace elements detected in fish and clam tissue and bed sediment of the Nevada Basin and Range Study Unit. [µg/g, micrograms per gram; µg/kg, micrograms per kilogram; %, percent; <, less than; - -, not measured]

occurrence tables part 3

occurence tables part 4


Semivolatile organic compounds, organochlorine compounds, and trace elements not detected in fish and clam tissue and bed sediment of the Nevada Basin and Range Study Unit.
 

Semivolatile organic compounds

1,2,4-Trichlorobenzene 
1,2-Dichlorobenzene 
1,2-Dimethylnaphthalene 
1,3-Dichlorobenzene 
1,4-Dichlorobenzene 
1,6-Dimethylnaphthalene 
1-Methyl-9H-fluorene 
1-Methylphenanthrene 
1-Methylpyrene 
2,3,6-Trimethylnaphthalene 
2,4-Dinitrotoluene 
2,6-Dinitrotoluene 
2-Chloronaphthalene 
2-Chlorophenol 
2-Ethylnaphthalene 
2-Methylanthracene 
4,5-Methylenephenanthrene 
4-Bromophenyl-phenylether 
4-Chloro-3-methylphenol 
4-Chlorophenyl-phenylether 
9H-Carbazole 
9H-Fluorene 
Acenaphthene
Acenaphthylene 
Acridine 
Anthraquinone 
Azobenzene 
C8-Alkylphenol 
Dibenz [a,h] anthracene 
Dibenzothiophene 
Isophorone 
N-Nitrosodi-n-propylamine 
N-Nitrosodiphenylamine 
Naphthalene 
Nitrobenzene 
Pentachloronitrobenzene 
Phenanthridine 
Quinoline 
bis (2-Chloroethoxy)methane

Organochlorine compounds

Aldrin 
Chloroneb 
DCPA 
Dieldrin 
Endosulfan I 
Endrin 
Heptachlor epoxide (Heptachlor metabolite) 
Heptachlor 
Hexachlorobenzene 
Isodrin 
Mirex 
PCB, total 
Pentachloroanisole (PCA, pentachlorophenol metabolite)Toxaphene 
alpha-HCH 
beta-HCH 
cis-Permethrin 
delta-HCH 
gamma-HCH 
o,p'-Methoxychlor 
p,p'-Methoxychlor 
total-Chlordane 
trans-Permethrin 


a Selected water-quality standards and guidelines [58].

 b Rates of detection are based on the number of analyses and detections in the Study Unit, not on national data. Rates of detection for herbicides and insecticides were computed by only counting detections equal to or greater than 0.01 µg/L in order to facilitate equal comparisons among compounds, which had widely varying detection limits. For herbicides and insecticides, a detection rate of "<1%" means that all detections are less than 0.01 µg/L, or the detection rate rounds to less than 1 percent. For other compound groups, all detections were counted and minimum detection limits for most compounds were similar to the lower end of the national ranges shown. Method detection limits for all compounds in these tables are summarized in [58].

 c Detections of these compounds are reliable, but concentrations are determined with greater uncertainty than for the other compounds and are reported as estimated values [66].

 d The guideline for methyl tert-butyl ether is between 20 and 40 µg/L; if the tentative cancer classification C is accepted, the lifetime health advisory will be 20 µg/L [58].

 e Selected sediment-quality guidelines [58].


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Suggested citation:
Bevans, H.E., Lico, M.S., and Lawrence, S.J., 1998, Water Quality in the Las Vegas Valley Area and the Carson and Truckee River Basins, Nevada and California, 1992-96, on line at <URL: http://water.usgs.gov/pubs/circ1170>, updated 19 March 1998

This page is a subpage of <URL:http://water.usgs.gov/pubs/circ1170>
Email questions and comments to GS-W_NAWQA_Outreach@usgs.gov
Last modified: Tue Mar 17 17:53:42 1998