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Table 1.—Acute Water Quality Criteria for Protection of Aquatic Life in Ambient Water
EPA recommends that metals criteria be expressed as dissolved concentrations (see appendix A, I.A.4 for more information regarding metals criteria).
(a)
| Chemical | CMC (µg/L) | Conversion factor (CF) |
| Arsenic (III) | a,b339.8 | 1.000 |
| Chromium (VI) | a,b16.02 | 0.982 |
| Cyanide | c22 | n/a |
| Dieldrin | d0.24 | n/a |
| Endrin | d0.086 | n/a |
| Lindane | d0.95 | n/a |
| Mercury (II) | a,b1.694 | 0.85 |
| Parathion | d0.065 | n/a |
aCMC = CMCtr.
bCMCd = (CMCtr) CF. The CMCd shall be rounded to two significant digits.
cCMC should be considered free cyanide as CN.
dCMC = CMCt.
Notes:
The term "n/a" means not applicable.
CMC is Criterion Maximum Concentration.
CMCtr is the CMC expressed as total recoverable.
CMCd is the CMC expressed as a dissolved concentration.
CMCt is the CMC expressed as a total concentration.
(b)
| Chemical | mA | bA | Conversion factor (CF) |
| Cadmiuma,b | 1.128 | −3.6867 | 0.85 |
| Chromium (III)a,b | 0.819 | 3.7256 | 0.316 |
| Coppera,b | 0.9422 | −1.700 | 0.960 |
| Nickela,b | 0.846 | 2.255 | 0.998 |
| Pentachlorophenolc | 1.005 | −4.869 | n/a |
| Zinca,b | 0.8473 | 0.884 | 0.978 |
aCMCtr = exp {mA[ln (hardness)] bA}.
bCMCd = (CMCtr) CF. The CMCd shall be rounded to two significant digits.
cCMCt = exp mA{[pH] bA}. The CMCt shall be rounded to two significant digits.
Notes:
The term "exp" represents the base e exponential function.
The term "n/a" means not applicable.
CMC is Criterion Maximum Concentration.
CMCt ris the CMC expressed as total recoverable.
CMCd is the CMC expressed as a dissolved concentration.
CMCt is the CMC expressed as a total concentration.
[60 FR 15387, Mar. 23, 1995, as amended at 65 FR 35286, June 2, 2000]
Table 2.—Chronic Water Quality Criteria for Protection of Aquatic Life in Ambient Water
EPA recommends that metals criteria be expressed as dissolved concentrations (see appendix A, I.A.4 for more information regarding metals criteria).
(a)
| Chemical | CCC (µg/L) | Conversion factor (CF) |
| Arsenic (III) | a,b147.9 | 1.000 |
| Chromium (VI) | a,b10.98 | 0.962 |
| Cyanide | c5.2 | n/a |
| Dieldrin | d0.056 | n/a |
| Endrin | d0.036 | n/a |
| Mercury (II) | a,b0.9081 | 0.85 |
| Parathion | d0.013 | n/a |
| Selenium | a,b5 | 0.922 |
aCCC = CCCtr.
bCCCd = (CCCtr) CF. The CCCd shall be rounded to two significant digits.
cCCC should be considered free cyanide as CN.
dCCC = CCCt.
Notes:
The term "n/a" means not applicable.
CCC is Criterion Continuous Concentration.
CCCtr is the CCC expressed as total recoverable.
CCCd is the CCC expressed as a dissolved concentration.
CCCt is the CCC expressed as a total concentration.
(b)
| Chemical | mc | bc | Conversion factor (CF) |
| Cadmiuma,b | 0.7852 | −2.715 | 0.850 |
| Chromium (III)a,b | 0.819 | 0.6848 | 0.860 |
| Coppera,b | 0.8545 | −1.702 | 0.960 |
| Nickela,b | 0.846 | 0.0584 | 0.997 |
| Pentachlorophenolc | 1.005 | −5.134 | n/a |
| Zinca,b | 0.8473 | 0.884 | 0.986 |
aCCCtr = exp {mc[ln (hardness)] bc}.
bCCCd = (CCCtr) (CF). The CCCd shall be rounded to two significant digits.
cCMCt = exp {mA[pH] bA}. The CMCt shall be rounded to two significant digits.
Notes:
The term "exp" represents the base e exponential function.
The term "n/a" means not applicable.
CCC is Criterion Continuous Concentration.
CCCtr is the CCC expressed as total recoverable.
CCCd is the CCC expressed as a dissolved concentration.
CCCt is the CCC expressed as a total concentration.
| Chemical | HNV (µg/L) | HCV (µg/L) | ||
| Drinking | Nondrinking | Drinking | Nondrinking | |
| Benzene | 1.9E1 | 5.1E2 | 1.2E1 | 3.1E2 |
| Chlordane | 1.4E-3 | 1.4E-3 | 2.5E-4 | 2.5E-4 |
| Chlorobenzene | 4.7E2 | 3.2E3 | ||
| Cyanides | 6.0E2 | 4.8E4 | ||
| DDT | 2.0E-3 | 2.0E-3 | 1.5E-4 | 1.5E-4 |
| Dieldrin | 4.1E-4 | 4.1E-4 | 6.5E-6 | 6.5E-6 |
| 2,4-Dimethylphenol | 4.5E2 | 8.7E3 | ||
| 2,4-Dinitrophenol | 5.5E1 | 2.8E3 | ||
| Hexachlorobenzene | 4.6E-2 | 4.6E-2 | 4.5E-4 | 4.5E-4 |
| Hexachloroethane | 6.0 | 7.6 | 5.3 | 6.7 |
| Lindane | 4.7E-1 | 5.0E-1 | ||
| Mercury1 | 1.8E-3 | 1.8E-3 | ||
| Methylene chloride | 1.6E3 | 9.0E4 | 4.7E1 | 2.6E3 |
| 2,3,7,8-TCDD | 6.7E-8 | 6.7E-8 | 8.6E-9 | 8.6E-9 |
| Toluene | 5.6E3 | 5.1E4 | ||
| Toxaphene | 6.8E-5 | 6.8E-5 | ||
| Trichloroethylene | 2.9E1 | 3.7E2 | ||
[60 FR 15387, Mar. 23, 1995, as amended at 62 FR 11731, Mar. 12, 1997; 62 FR 52924, Oct. 9, 1997]
| Chemical | Criteria (µg/L) |
| DDT and metabolites | 1.1E-5 |
| Mercury (including methylmercury) | 1.3E-3 |
| PCBs (class) | 1.2E-4 |
| 2,3,7,8-TCDD | 3.1E-9 |
| Alkalinity |
| Ammonia |
| Bacteria |
| Biochemical oxygen demand (BOD) |
| Chlorine |
| Color |
| Dissolved oxygen |
| Dissolved solids |
| pH |
| Phosphorus |
| Salinity |
| Temperature |
| Total and suspended solids |
| Turbidity |
| A. Pollutants that are bioaccumulative chemicals of concern (BCCs): |
| Chlordane |
| 4,4'-DDD; p,p'-DDD; 4,4'-TDE; p,p'-TDE |
| 4,4'-DDE; p,p'-DDE |
| 4,4'-DDT; p,p'-DDT |
| Dieldrin |
| Hexachlorobenzene |
| Hexachlorobutadiene; hexachloro-1, 3-butadiene |
| Hexachlorocyclohexanes; BHCs |
| alpha-Hexachlorocyclohexane; alpha-BHC |
| beta-Hexachlorocyclohexane; beta-BHC |
| delta-Hexachlorocyclohexane; delta-BHC |
| Lindane; gamma-hexachlorocyclohexane; |
| gamma-BHC |
| Mercury |
| Mirex |
| Octachlorostyrene |
| PCBs; polychlorinated biphenyls |
| Pentachlorobenzene |
| Photomirex |
| 2,3,7,8-TCDD; dioxin |
| 1,2,3,4-Tetrachlorobenzene |
| 1,2,4,5-Tetrachlorobenzene Toxaphene |
| B. Pollutants that are not bioaccumulative chemicals of concern: |
| Acenaphthene |
| Acenaphthylene |
| Acrolein; 2-propenal |
| Acrylonitrile |
| Aldrin |
| Aluminum |
| Anthracene |
| Antimony |
| Arsenic |
| Asbestos |
| 1,2-Benzanthracene; benz[a]anthracene |
| Benzene |
| Benzidine |
| Benzo[a]pyrene; 3,4-benzopyrene |
| 3,4-Benzofluoranthene; benzo[b]fluoranthene |
| 11,12-Benzofluoranthene; benzo[k]fluoranthene |
| 1,12-Benzoperylene; benzo[ghi]perylene |
| Beryllium |
| Bis(2-chloroethoxy) methane |
| Bis(2-chloroethyl) ether |
| Bis(2-chloroisopropyl) ether |
| Bromoform; tribomomethane |
| 4-Bromophenyl phenyl ether |
| Butyl benzyl phthalate |
| Cadmium |
| Carbon tetrachloride; tetrachloromethane |
| Chlorobenzene |
| p-Chloro-m-cresol; 4-chloro-3-methylphenol |
| Chlorodibromomethane |
| Chlorethane |
| 2-Chloroethyl vinyl ether |
| Chloroform; trichloromethane |
| 2-Chloronaphthalene |
| 2-Chlorophenol |
| 4-Chlorophenyl phenyl ether |
| Chlorpyrifos |
| Chromium |
| Chrysene |
| Copper |
| Cyanide |
| 2,4-D; 2,4-Dichlorophenoxyacetic acid |
| DEHP; di(2-ethylhexyl) phthalate |
| Diazinon |
| 1,2:5,6-Dibenzanthracene; dibenz[a,h]anthracene |
| Dibutyl phthalate; di-n-butyl phthalate |
| 1,2-Dichlorobenzene |
| 1,3-Dichlorobenzene |
| 1,4-Dichlorobenzene |
| 3,3'-Dichlorobenzidine |
| Dichlorobromomethane; bromodichloromethane |
| 1,1-Dichloroethane |
| 1,2-Dichloroethane |
| 1,1-Dichloroethylene; vinylidene chloride |
| 1,2-trans-Dichloroethylene |
| 2,4-Dichlorophenol |
| 1,2-Dichloropropane |
| 1,3-Dichloropropene; 1,3-dichloropropylene |
| Diethyl phthalate |
| 2,4-Dimethylphenol; 2,4-xylenol |
| Dimethyl phthalate |
| 4,6-Dinitro-o-cresol; 2-methyl-4,6-dinitrophenol |
| 2,4-Dinitrophenol |
| 2,4-Dinitrotoluene |
| 2,6-Dinitrotoluene |
| Dioctyl phthalate; di-n-octyl phthalate |
| 1,2-Diphenylhydrazine |
| Endosulfan; thiodan |
| alpha-Endosulfan |
| beta-Endosulfan |
| Endosulfan sulfate |
| Endrin |
| Endrin aldehyde |
| Ethylbenzene |
| Fluoranthene |
| Fluorene; 9H-fluorene |
| Fluoride |
| Guthion |
| Heptachlor |
| Heptachlor epoxide |
| Hexachlorocyclopentadiene |
| Hexachloroethane |
| Indeno[1,2,3-cd]pyrene; 2,3-o-phenylene pyrene |
| Isophorone |
| Lead |
| Malathion |
| Methoxychlor |
| Methyl bromide; bromomethane |
| Methyl chloride; chloromethane |
| Methylene chloride; dichloromethane |
| Napthalene |
| Nickel |
| Nitrobenzene |
| 2-Nitrophenol |
| 4-Nitrophenol |
| N-Nitrosodimethylamine |
| N-Nitrosodiphenylamine |
| N-Nitrosodipropylamine; N-nitrosodi-n-propylamine |
| Parathion |
| Pentachlorophenol |
| Phenanthrene |
| Phenol |
| Iron |
| Pyrene |
| Selenium |
| Silver |
| 1,1,2,2-Tetrachloroethane |
| Tetrachloroethylene |
| Thallium |
| Toluene; methylbenzene |
| 1,2,4-Trichlorobenzene |
| 1,1,1-Trichloroethane |
| 1,1,2-Trichloroethane |
| Trichloroethylene; trichloroethene |
| 2,4,6-Trichlorophenol |
| Vinyl chloride; chloroethylene; chloroethene |
| Zinc |
[62 FR 11731, Mar. 12, 1997; 62 FR 52924, Oct. 9, 1997]