The following tables summarize data collected for NAWQA studies from 1992-95 by showing results for the San Joaquin-Tulare Basins 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 1000), 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 San Joaquin-Tulare Basins 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]
Herbicides, insecticides, volatile organic compounds, and nutrients not detected in ground and surface waters of the San Joaquin-Tulare Basins Study Unit.
2,4,5-T
2,4,5-TP (Silvex, Fenoprop)
Acetochlor (Harness Plus, Surpass)
Acifluorfen (Blazer, Tackle 2S)
Bentazon (Basagran, Bentazone, Bendioxide)
Bromoxynil (Buctril, Brominal)
Chloramben (Amiben, Amilon-WP, Vegiben)
Clopyralid (Stinger, Lontrel, Reclaim, Transline)
Dacthal mono-acid (Dacthal metabolite)
Dicamba (Banvel, Dianat, Scotts Proturf)
Fenuron (Fenulon, Fenidim)
Fluometuron (Flo-Met, Cotoran, Cottonex, Meturon)
MCPB (Thistrol)
Neburon (Neburea, Neburyl, Noruben)
Picloram (Grazon, Tordon)
Propham (Tuberite)
3-Hydroxycarbofuran (Carbofuran metabolite)
Aldicarb sulfone (Standak, aldoxycarb, aldicarb metabolite)
Aldicarb sulfoxide (Aldicarb metabolite)
Methiocarb (Slug-Geta, Grandslam, Mesurol)
Oxamyl (Vydate L, Pratt)
Parathion (Roethyl-P, Alkron, Panthion, Phoskil)
Phorate (Thimet, Granutox, Geomet, Rampart)
Propoxur (Baygon, Blattanex, Unden, Proprotox)
1,1,1,2-Tetrachloroethane (1,1,1,2-TeCA)
1,1,1-Trichloroethane (Methylchloroform)
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-Dichloroethane (Ethylidene dichloride)
1,1-Dichloroethene (Vinylidene chloride)
1,1-Dichloropropene
1,2,3-Trichlorobenzene (1,2,3-TCB)
1,2,4-Trichlorobenzene
1,2-Dichlorobenzene (o-Dichlorobenzene, 1,2-DCB)
1,2-Dichloroethane (Ethylene dichloride)
1,3,5-Trimethylbenzene (Mesitylene)
1,3-Dichlorobenzene (m-Dichlorobenzene)
1,3-Dichloropropane (Trimethylene dichloride)
1,4-Dichlorobenzene (p-Dichlorobenzene, 1,4-DCB)
1-Chloro-2-methylbenzene (o-Chlorotoluene)
1-Chloro-4-methylbenzene (p-Chlorotoluene)
2,2-Dichloropropane
Benzene
Bromobenzene (Phenyl bromide)
Bromochloromethane (Methylene chlorobromide)
Bromomethane (Methyl bromide)
Chlorobenzene (Monochlorobenzene)
Chloroethane (Ethyl chloride)
Chloroethene (Vinyl chloride)
Chloromethane (Methyl chloride)
Dibromomethane (Methylene dibromide)
Dichlorodifluoromethane (CFC 12, Freon 12)
Dimethylbenzenes (Xylenes (total))
Ethenylbenzene (Styrene)
Ethylbenzene (Phenylethane)
Hexachlorobutadiene
Isopropylbenzene (Cumene)
Methyl tert-butyl ether (MTBE)
Naphthalene
Tetrachloromethane (Carbon tetrachloride)
cis-1,2-Dichloroethene ((Z)-1,2-Dichloroethene)
cis-1,3-Dichloropropene ((Z)-1,3-Dichloropropene)
n-Butylbenzene (1-Phenylbutane)
n-Propylbenzene (Isocumene)
p-Isopropyltoluene (p-Cymene)
sec-Butylbenzene
tert-Butylbenzene
trans-1,2-Dichloroethene ((E)-1,2-Dichlorothene)
trans-1,3-Dichloropropene ((E)-1,3-Dichloropropene)
No nondetects
Concentrations of semivolatile organic compounds, organochlorine compounds, and trace elements detected in fish and clam tissue and bed sediment of the San Joaquin-Tulare Basins Study Unit. [µg/g, micrograms per gram, in dry weight; µg/kg, micrograms per kilogram, in dry weight for semivolatile organic compounds and organochlorine compounds in bed sediment, and in wet weight for organochlorine compounds in fish and clam tissue; %, percent; <, less than; - -, not measured; trade names may vary]
Semivolatile organic compounds, organochlorine compounds, and trace elements not detected in fish and clam tissue and bed sediment of the San Joaquin-Tulare Basins Study Unit.
1,2,4-Trichlorobenzene
1,2-Dichlorobenzene (o-Dichlorobenzene, 1,2-DCB)
1,2-Dimethylnaphthalene
1,3-Dichlorobenzene (m-Dichlorobenzene)
1,4-Dichlorobenzene (p-Dichlorobenzene, 1,4-DCB)
1,6-Dimethylnaphthalene
1-Methyl-9H-fluorene
2,2-Biquinoline
2,3,6-Trimethylnaphthalene
2,4-Dinitrotoluene
2-Chloronaphthalene
2-Chlorophenol
2-Ethylnaphthalene
3,5-Dimethylphenol
4-Bromophenyl-phenylether
4-Chloro-3-methylphenol
4-Chlorophenyl-phenylether
Acenaphthene
Acenaphthylene
Azobenzene
Benzo [c] cinnoline
Benzo [g,h,i] perylene
C8-Alkylphenol
Dibenzothiophene
Dimethylphthalate
Isophorone
Isoquinoline
N-Nitrosodi-n-propylamine
N-Nitrosodiphenylamine
Naphthalene
Nitrobenzene
Pentachloronitrobenzene
Phenanthridine
Quinoline
bis (2-Chloroethoxy)methane
Aldrin (HHDN, Octalene)
Chloroneb (chloronebe, Demosan, Soil Fungicide 1823)
Endosulfan I (alpha-Endosulfan, Thiodan, Cyclodan, Beosit, Malix,
Thimul, Thifor)
Endrin (Endrine)
Heptachlor epoxide (Heptachlor metabolite)
Heptachlor (Heptachlore, Velsicol 104)
Hexachlorobenzene (HCB)
Isodrin (Isodrine, Compound 711)
Mirex (Dechlorane)
Pentachloroanisole (PCA, pentachlorophenol metabolite)
alpha-HCH (alpha-BHC, alpha-lindane,
alpha-hexachlorocyclohexane, alpha-benzene hexachloride)
beta-HCH (beta-BHC, beta-hexachlorocyclohexane,
alpha-benzene hexachloride)
delta-HCH (delta-BHC, delta-hexachlorocyclohexane,
delta-benzene hexachloride)
gamma-HCH (Lindane, gamma-BHC, Gammexane, Gexane, Soprocide,
gamma-hexachlorocyclohexane, gamma-benzene hexachloride,
gamma-benzene)
o,p'-Methoxychlor
p,p'-Methoxychlor (Marlate, methoxychlore)
No nondetects
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 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 one 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 (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 In the San Joaquin-Tulare Basins Study Unit, 152 ground-water samples were analyzed for 1,2-dibromo-3-chloropropane (DBCP) and 1,2-dibromoethane (EDB) at lower detection limits (0.03 and 0.04 µg/L, respectively). DBCP was detected in 50 of these samples and EDB was detected in one sample.
e 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).
f Selected sediment-quality guidelines (Gilliom and others, in press).
(These tables were designed and built by Sarah Ryker, Jonathan Scott, and Alan Haggland.)