Water Quality in the South Platte River Basin, Colorado, Nebraska, and Wyoming, 1992-95

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SUMMARY OF COMPOUND DETECTIONS AND CONCENTRATIONS:

Compounds Detected in Surface and Ground Water in the South Platte River Basin.

The following tables summarize data collected for NAWQA studies from 1992-95 by listing results for the South Platte River Basin 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.

  Water samples: Compounds detected || Compounds not detected

  Fish tissue and bed sediment samples: Compounds detected || Compounds not detected

Concentrations of pesticides, volatile organic compounds, and nutrients detected in ground and surface waters of the South Platte River Basin Study Unit.

[mg/L, milligrams per liter; µg/L, micrograms per liter; pCi/L, picocuries per liter; %, percent; <, less than; - -, not measured; trade names may vary]

EXPLANATION

Compounds Not Detected in Surface and Ground Water in the South Platte River Basin.

Pesticides, volatile organic compounds, and nutrients not detected in ground and surface waters of the South Platte River Basin Study Unit.

Herbicides

2,4,5-T

2,4,5-TP (Silvex, Fenoprop)

2,4-DB (Butyrac, Butoxone, Embutox Plus, Embutone)

Acifluorfen (Blazer, Tackle 2S)

Chloramben (Amiben, Amilon-WP, Vegiben)

Clopyralid (Stinger, Lontrel, Reclaim, Transline)

Dinoseb (Dinosebe)

Fenuron (Fenulon, Fenidim)

Fluometuron (Flo-Met, Cotoran, Cottonex, Meturon)

MCPA (Rhomene, Rhonox, Chiptox)

MCPB (Thistrol)

Neburon (Neburea, Neburyl, Noruben)

Norflurazon (Evital, Predict, Solicam, Zorial)

Picloram (Grazon, Tordon)

Thiobencarb (Bolero, Saturn, Benthiocarb, Abolish)

Triclopyr (Garlon, Grandstand, Redeem, Remedy)

Insecticides

3-Hydroxycarbofuran
(Carbofuran metabolite)

Aldicarb sulfone (Standak, aldoxycarb, aldicarb metabolite)

Methiocarb (Slug-Geta, Grandslam, Mesurol)

Methomyl (Lanox, Lannate, Acinate)

Oxamyl (Vydate L, Pratt)

Volatile organic compounds

1,1,1,2-Tetrachloroethane (1,1,1,2-TeCA)

1,1,2,2-Tetrachloroethane

1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113, CFC 113)

1,1,2-Trichloroethane (Vinyl trichloride)

1,1-Dichloropropene

1,2,3-Trichlorobenzene (1,2,3-TCB)

1,2,3-Trichloropropane (Allyl trichloride)

1,2,4-Trichlorobenzene

1,2-Dibromo-3-chloropropane (DBCP, Nemagon)

1,2-Dibromoethane (EDB, Ethylene dibromide)

1,2-Dichloroethane (Ethylene dichloride)

1,3-Dichlorobenzene (m-Dichlorobenzene)

1,3-Dichloropropane (Trimethylene dichloride)

1-Chloro-2-methylbenzene (o-Chlorotoluene)

1-Chloro-4-methylbenzene (p-Chlorotoluene)

2,2-Dichloropropane

Bromobenzene (Phenyl bromide)

Bromochloromethane (Methylene chlorobromide)

Bromomethane (Methyl bromide)

Dibromomethane (Methylene dibromide)

Ethenylbenzene (Styrene)

Hexachlorobutadiene

Tetrachloromethane
(Carbon tetrachloride)

Trichlorofluoromethane (CFC 11, Freon 11)

cis-1,3-Dichloropropene ((Z)-1,3-Dichloropropene)

trans-1,3-Dichloropropene ((E)-1,3-Dichloropropene)

Nutrients

No non-detects

Concentration Of Compounds In Fish Tissue and Streambed Sediment in the South Platte River Basin.

Concentrations of semivolatile organic compounds, organochlorine compounds, and trace elements detected in fish tissue and bed sediment of the South Platte River Basin Study Unit.

EXPLANATION

Summary of Compound Detections and Concentrations tables were designed and built by Sarah Ryker, Jonathon Scott, and Alan Haggland, U.S. Geological Survey.

Compounds Not Detected in Fish Tissue and Streambed Sediment in the South Platte River Basin.

Semivolatile organic compounds, organochlorine compounds, and trace elements not detected in fish tissue and bed sediment of the South Platte River Basin Study Unit.

Semivolatile organic compounds

1,2,4-Trichlorobenzene

1,2-Dichlorobenzene (o-Dichlorobenzene, 1,2-DCB)

1,4-Dichlorobenzene (p-Dichlorobenzene, 1,4-DCB)

2,4-Dinitrotoluene

2-Chlorophenol

2-Ethylnaphthalene

4-Bromophenyl-phenylether

4-Chloro-3-methylphenol

4-Chlorophenyl-phenylether

Azobenzene

Benzo [c] cinnoline

C8-Alkylphenol

Dimethylphthalate

N-Nitrosodi-n-propylamine

N-Nitrosodiphenylamine

Nitrobenzene

Quinoline

Organochlorine compounds

Aldrin (HHDN, Octalene)

Chloroneb (chloronebe, Demosan, Soil Fungicide 1823)

Endrin (Endrine)

Heptachlor (Heptachlore, Velsicol 104)

Isodrin (Isodrine, Compound 711)

Mirex (Dechlorane)

alpha-HCH (alpha-BHC, alpha-lindane, alpha-hexachlorocyclohexane, alpha-benzene hexachloride)

beta-HCH (beta-BHC, beta-hexachlorocyclohexane, alpha-benzene hexachloride)

cis-Permethrin (Ambush, Astro, Pounce, Pramex, Pertox, Ambushfog, Kafil, Perthrine, Picket, Picket G, Dragnet, Talcord, Outflank, Stockade, Eksmin, Coopex, Peregin, Stomoxin, Stomoxin P, Qamlin, Corsair, Tornade)

delta-HCH (delta-BHC, delta-hexachlorocyclohexane, delta-benzene hexachloride)

o,p'-Methoxychlor

trans-Permethrin (Ambush, Astro, Pounce, Pramex, Pertox, Ambushfog, Kafil, Perthrine, Picket, Picket G, Dragnet, Talcord, Outflank, Stockade, Eksmin, Coopex, Peregin, Stomoxin, Stomoxin P, Qamlin, Corsair, Tornade)

Trace elements

No non-detects

^a Selected water-quality standards and guidelines (Gilliom and others, in press).

^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 to facilitate equal comparisons among compounds that had varying detection limits; a value of <1% signifies that there were only detections below, or <1% above, the 0.01 µg/L level. Some herbicides and insecticides were not reliably detected as low as the 0.01 µg/L level, so frequencies may be underestimated for some compounds. For other compound groups, all detections were counted and detection limits for most compounds were similar to the lower end of the national ranges shown. Method detection limits for all compounds in all groups are summarized in (Gilliom and others, in press).

^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 (Zaugg and others, 1995).

^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 (Gilliom and others, in press).

^e Selected sediment-quality guidelines (Gilliom and others, in press).

U.S. Geological Survey Circular 1167

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