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National Recommended Water Quality Criteria - Human Health Criteria Table

Human health ambient water quality criteria represent specific levels of chemicals or conditions in a water body that are not expected to cause adverse effects to human health. EPA provides recommendations for “water + organism” and “organism only” human health criteria for states and authorized tribes to consider when adopting criteria into their water quality standards. These human health criteria are developed by EPA under Section 304(a) of the Clean Water Act.

Select pollutant name for current criteria document.


Pollutant CAS Number Human Health for the consumption of Water + Organism
(µg/L)
Human Health for the consumption of Organism Only
(µg/L)
Publication Year Notes
Acenaphthene (P) 83329 70 90 2015 The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.
Acrolein (P) 107028 3 400 2015  
Acrylonitrile (P) 107131 0.061 7.0 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Aldrin (P) 309002 0.00000077 0.00000077 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
alpha-Hexachlorocyclohexane (HCH) (P) 319846 0.00036 0.00039 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
alpha-Endosulfan (P) 959988 20  30  2015  
Anthracene (P) 120127 300  400  2015  
Antimony (P) 7440360 5.6 640 1980

This criterion was revised to reflect EPA's q1* or RfD as contained in the Integrated Risk Information System (IRIS) as of May 17, 2002. The fish tissue bioconcentration factor (BCF) is from the 1980 Ambient Water Quality Criteria document.

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Arsenic (P) 7440382 0.018 0.14 1992

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

This recommended water quality criterion for arsenic refers to the inorganic form only.

Asbestos (P) 1332214 7 million fibers/L 1991

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Barium 7440393 1,000 1986

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

This human health criterion is the same as originally published in the Quality Criteria for Water, 1976 ("Red Book") which predates the 1980 methodology and did not utilize the fish ingestion BCF approach. This same criterion value is published in the Quality Criteria for Water, 1986 ("Gold Book").

Benzene (P) 71432 0.58-2.1 16-58 2015

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

Benzidine (P) 92875 0.00014 0.011 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Benzo(a)anthracene (P) 56553 0.0012 0.0013 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Benzo(a)pyrene (P) 50328 0.00012 0.00013 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Benzo(b)fluoranthene (P) 205992 0.0012 0.0013 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Benzo(k)fluoranthene (P) 207089 0.012 0.013 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Beryllium (P) 7440417 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
beta-Hexachlorocyclohexane (HCH) (P) 319857 0.0080 0.014 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
beta-Endosulfan (P) 33213659 20  40  2015  
Bis(2-Chloro-1-methylethyl) Ether (P) 108601 200  4,000  2015  
Bis(2-Chloroethyl) Ether (P) 111444 0.030 2.2 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Bis(2-Ethylhexyl) Phthalate (P) 117817 0.32 0.37 2015

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

Bis(Chloromethyl) Ether 542881 0.00015 0.017 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Bromoform (P) 75252 7.0 120 2015

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

Butylbenzyl Phthalate (P) 85687 0.10 0.10 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Cadmium (P) 7440439 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Carbon Tetrachloride (P) 56235 0.4 5 2015

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

Chlordane (P) 57749 0.00031 0.00032 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Chlorobenzene (P) 108907 100 800 2015

The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Chlorodibromomethane (P) 124481 0.80 21 2015

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

Chloroform (P) 67663 60 2,000 2015

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Chlorophenoxy Herbicide (2,4-D) 94757 1,300 12,000 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Chlorophenoxy Herbicide (2,4,5-TP) [Silvex] 93721 100 400 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Chromium (III) (P) 16065831 Total EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Chromium (VI) (P) 18540299 Total EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Chrysene (P) 218019 0.12 0.13 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Copper (P) 7440508 1,300 1992 

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

This chemical has a criterion for organoleptic (taste and order) effects. In some cases, the organoleptic criterion may be more stringent.

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Cyanide (P) 57125 4 400 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Dibenzo(a,h)anthracene (P) 53703 0.00012 0.00013 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Dichlorobromomethane (P) 75274 0.95  27 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Dieldrin (P) 60571 0.0000012 0.0000012 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Diethyl Phthalate (P) 84662 600  600  2015  
Dimethyl Phthalate (P) 131113 2,000 2,000 2015  
Di-n-Butyl Phthalate (P) 84742 20 30  2015  
Dinitrophenols 25550587 10 1,000 2015  
Endosulfan Sulfate (P) 1031078 20  40  2015  
Endrin (P) 72208 0.03 0.03 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Endrin Aldehyde (P) 7421934 2015  
Ethylbenzene (P) 100414 68 130 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Fluoranthene (P) 206440 20  20  2015  
Fluorene (P) 86737 50  70  2015  
gamma-Hexachlorocyclohexane (HCH) [Lindane] (P) 58899 4.2 4.4 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Heptachlor (P) 76448 0.0000059 0.0000059 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Heptachlor Epoxide (P) 1024573 0.000032 0.000032 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Hexachlorobenzene (P) 118741 0.000079 0.000079 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Hexachlorobutadiene (P) 87683 0.01 0.01 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Hexachlorocyclohexane (HCH) -Technical 608731 0.0066 0.010 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Hexachlorocyclopentadiene (P) 77474 4 4 2015

The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Hexachloroethane (P) 67721 0.1 0.1 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Indeno(1,2,3-cd)pyrene (P) 193395 0.0012 0.0013 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Isophorone (P) 78591 34 1,800 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Manganese 7439965 50 100 1993

The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.

The Human Health for the consumption of Water + Organism criterion for manganese is not based on toxic effects, but rather is intended to minimize objectionable qualities such as laundry stains and objectionable tastes in beverages.

Methylmercury (P) 22967926   0.3 mg/kg 2001 This fish tissue residue criterion for methylmercury is based on a total fish consumption rate of 0.0175 kg/day.
Methoxychlor 72435 0.02 0.02 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Methyl Bromide (P) 74839 100  10,000  2015  
Methylene Chloride (P) 75092 20 1,000 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Nickel (P) 7440020 610 4,600 1998 This criterion was revised to reflect EPA's q1* or RfD as contained in the Integrated Risk Information System (IRIS) as of May 17, 2002. The fish tissue bioconcentration factor (BCF) is from the 1980 Ambient Water Quality Criteria document.
Nitrates 14797558 10,000 1986 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Nitrobenzene (P) 98953 10 600 2015 The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.
Nitrosamines 0.0008 1.24 1980 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Nitrosodibutylamine 924163 0.0063 0.22 2002 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Nitrosodiethylamine 55185 0.0008 1.24 2002 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Nitrosopyrrolidine 930552 0.016 34 2002 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
N-Nitrosodimethylamine (P) 62759 0.00069 3.0 2002 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
N-Nitrosodi-n-Propylamine (P) 621647 0.0050 0.51 2002 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
N-Nitrosodiphenylamine (P) 86306 3.3 6.0 2002 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Pathogen and Pathogen Indicators 2012

See EPA's 2012 Recreational Water Quality Criteria

For Shellfish see Quality Criteria for Water 1986 ("Gold Book")  

Pentachlorobenzene  608935 0.1  0.1  2015  
Pentachlorophenol (P) 87865 0.03 0.04 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

pH 5 – 9 1986  
Phenol (P) 108952 4,000 300,000 2015 The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.
Polychlorinated Biphenyls (PCBs) (P)   0.000064 0.000064 2002

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

This criterion applies to total PCBs (e.g., the sum of all congener or all isomer or homolog or Aroclor analyses).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Pyrene (P) 129000 20  30  2015  
Selenium (P) 7782492 170 4200 2002 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Solids Dissolved and Salinity 250,000 1986  
Tetrachloroethylene (P) 127184 10 29 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Thallium (P) 7440280 0.24 0.47 2003  
Toluene (P) 108883 57 520 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
Toxaphene (P) 8001352 0.00070 0.00071 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Trichloroethylene (P) 79016 0.6 7 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Vinyl Chloride (P) 75014 0.022 1.6 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

Zinc (P) 7440666 7,400 26,000 2002 The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.
1,1,1-Trichloroethane (P) 71556 10,000 200,000 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
1,1,2,2-Tetrachloroethane (P) 79345 0.2 3 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
1,1,2-Trichloroethane (P) 79005 0.55 8.9 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

1,1-Dichloroethylene (P) 75354 300 20,000 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
1,2,4,5-Tetrachlorobenzene 95943 0.03  0.03  2015  
1,2,4-Trichlorobenzene (P) 120821 0.071 0.076 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
1,2-Dichlorobenzene (P) 95501 1,000 3,000 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
1,2-Dichloroethane (P) 107062 9.9 650 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

1,2-Dichloropropane (P) 78875 0.90 31 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

1,2-Diphenylhydrazine (P) 122667 0.03 0.2 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
Trans-1,2-Dichloroethylene (P) 156605 100 4,000 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
1,3-Dichlorobenzene (P) 541731 7 10 2015  
1,3-Dichloropropene (P) 542756 0.27 12 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
1,4-Dichlorobenzene (P) 106467 300 900 2015 EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.
2,3,7,8-TCDD (Dioxin) (P) 1746016 5.0E-9 5.1E-9 2002

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

EPA has issued a Maximum Contaminant Level (MCL) for this chemical which may be more stringent. See EPA's National Primary Drinking Water Regulations.

2,4,5-Trichlorophenol 95954 300 600 2015 The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.
2,4,6-Trichlorophenol (P) 88062 1.5 2.8 2015

This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.

2,4-Dichlorophenol (P) 120832 10 60 2015 The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.
2,4-Dimethylphenol (P) 105679 100 3,000 2015 The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.
2,4-Dinitrophenol (P) 51285 10  300  2015  
2,4-Dinitrotoluene (P) 121142 0.049  1.7 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
2-Chloronaphthalene (P) 91587 800  1,000  2015  
2-Chlorophenol (P) 95578 30 800 2015 The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.
2-Methyl-4,6-Dinitrophenol (P) 534521 2 30 2015  
3,3'-Dichlorobenzidine (P) 91941 0.049 0.15 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
3-Methyl-4-Chlorophenol (P) 59507 500 2,000 2015 The criterion for organoleptic (taste and order) effects may be more stringent. See National Recommended Water Quality Criteria - Organoleptic Effects.
p,p′-Dichlorodiphenyldichloroethane (DDD) (P) 72548 0.00012 0.00012 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
p,p′-Dichlorodiphenyldichloroethylene (DDE) (P) 72559 0.000018 0.000018 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).
p,p′-Dichlorodiphenyltrichloroethane (DDT) (P) 50293 0.000030 0.000030 2015 This criterion is based on carcinogenicity of 10-6 risk. Alternate risk levels may be obtained by moving the decimal point (e.g., for a risk level of 10-5, move the decimal point in the recommended criterion one place to the right).

NOTE: (P)= Priority Pollutant

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