National Primary Drinking Water Regulations | US EPA
zero
TT8
Nervous system or blood problems; increased risk of cancer
Added to water during sewage/wastewater treatment
Alachlor
zero
0.002
Eye, liver, kidney or spleen problems; anemia; increased risk of cancer
Runoff from herbicide used on row crops
Atrazine
0.003
0.003
Cardiovascular system or reproductive problems
Runoff from herbicide used on row crops
Benzene
zero
0.005
Anemia; decrease in blood platelets; increased risk of cancer
Discharge from factories; leaching from gas storage tanks and landfills
Benzo(a)pyrene (PAHs)
zero
0.0002
Reproductive difficulties; increased risk of cancer
Leaching from linings of water storage tanks and distribution lines
Carbofuran
0.04
0.04
Problems with blood, nervous system, or reproductive system
Leaching of soil fumigant used on rice and alfalfa
Carbon tetrachloride
zero
0.005
Liver problems; increased risk of cancer
Discharge from chemical plants and other industrial activities
Chlordane
zero
0.002
Liver or nervous system problems; increased risk of cancer
Residue of banned termiticide
Chlorobenzene
0.1
0.1
Liver or kidney problems
Discharge from chemical and agricultural chemical factories
2,4-D
0.07
0.07
Kidney, liver, or adrenal gland problems
Runoff from herbicide used on row crops
Dalapon
0.2
0.2
Minor kidney changes
Runoff from herbicide used on rights of way
1,2-Dibromo-3-chloropropane (DBCP)
zero
0.0002
Reproductive difficulties; increased risk of cancer
Runoff/leaching from soil fumigant used on soybeans, cotton, pineapples, and orchards
o-Dichlorobenzene
0.6
0.6
Liver, kidney, or circulatory system problems
Discharge from industrial chemical factories
p-Dichlorobenzene
0.075
0.075
Anemia; liver, kidney or spleen damage; changes in blood
Discharge from industrial chemical factories
1,2-Dichloroethane
zero
0.005
Increased risk of cancer
Discharge from industrial chemical factories
1,1-Dichloroethylene
0.007
0.007
Liver problems
Discharge from industrial chemical factories
cis-1,2-Dichloroethylene
0.07
0.07
Liver problems
Discharge from industrial chemical factories
trans-1,2-Dichloroethylene
0.1
0.1
Liver problems
Discharge from industrial chemical factories
Dichloromethane
zero
0.005
Liver problems; increased risk of cancer
Discharge from drug and chemical factories
1,2-Dichloropropane
zero
0.005
Increased risk of cancer
Discharge from industrial chemical factories
Di(2-ethylhexyl) adipate
0.4
0.4
Weight loss, liver problems, or possible reproductive difficulties.
Discharge from chemical factories
Di(2-ethylhexyl) phthalate
zero
0.006
Reproductive difficulties; liver problems; increased risk of cancer
Discharge from rubber and chemical factories
Dinoseb
0.007
0.007
Reproductive difficulties
Runoff from herbicide used on soybeans and vegetables
Dioxin (2,3,7,8-TCDD)
zero
0.00000003
Reproductive difficulties; increased risk of cancer
Emissions from waste incineration and other combustion; discharge from chemical factories
Diquat
0.02
0.02
Cataracts
Runoff from herbicide use
Endothall
0.1
0.1
Stomach and intestinal problems
Runoff from herbicide use
Endrin
0.002
0.002
Liver problems
Residue of banned insecticide
Epichlorohydrin
zero
TT8
Increased cancer risk, and over a long period of time, stomach problems
Discharge from industrial chemical factories; an impurity of some water treatment chemicals
Ethylbenzene
0.7
0.7
Liver or kidneys problems
Discharge from petroleum refineries
Ethylene dibromide
zero
0.00005
Problems with liver, stomach, reproductive system, or kidneys; increased risk of cancer
Discharge from petroleum refineries
Glyphosate
0.7
0.7
Kidney problems; reproductive difficulties
Runoff from herbicide use
Heptachlor
zero
0.0004
Liver damage; increased risk of cancer
Residue of banned termiticide
Heptachlor epoxide
zero
0.0002
Liver damage; increased risk of cancer
Breakdown of heptachlor
Hexachlorobenzene
zero
0.001
Liver or kidney problems; reproductive difficulties; increased risk of cancer
Discharge from metal refineries and agricultural chemical factories
Hexachlorocyclopentadiene
0.05
0.05
Kidney or stomach problems
Discharge from chemical factories
Lindane
0.0002
0.0002
Liver or kidney problems
Runoff/leaching from insecticide used on cattle, lumber, gardens
Methoxychlor
0.04
0.04
Reproductive difficulties
Runoff/leaching from insecticide used on fruits, vegetables, alfalfa, livestock
Oxamyl (Vydate)
0.2
0.2
Slight nervous system effects
Runoff/leaching from insecticide used on apples, potatoes, and tomatoes
Polychlorinated biphenyls (PCBs)
zero
0.0005
Skin changes; thymus gland problems; immune deficiencies; reproductive or nervous system difficulties; increased risk of cancer
Runoff from landfills; discharge of waste chemicals
Pentachlorophenol
zero
0.001
Liver or kidney problems; increased cancer risk
Discharge from wood preserving factories
Picloram
0.5
0.5
Liver problems
Herbicide runoff
Simazine
0.004
0.004
Problems with blood
Herbicide runoff
Styrene
0.1
0.1
Liver, kidney, or circulatory system problems
Discharge from rubber and plastic factories; leaching from landfills
Tetrachloroethylene
zero
0.005
Liver problems; increased risk of cancer
Discharge from factories and dry cleaners
Toluene
1
1
Nervous system, kidney, or liver problems
Discharge from petroleum factories
Toxaphene
zero
0.003
Kidney, liver, or thyroid problems; increased risk of cancer
Runoff/leaching from insecticide used on cotton and cattle
2,4,5-TP (Silvex)
0.05
0.05
Liver problems
Residue of banned herbicide
1,2,4-Trichlorobenzene
0.07
0.07
Changes in adrenal glands
Discharge from textile finishing factories
1,1,1-Trichloroethane
0.20
0.2
Liver, nervous system, or circulatory problems
Discharge from metal degreasing sites and other factories
1,1,2-Trichloroethane
0.003
0.005
Liver, kidney, or immune system problems
Discharge from industrial chemical factories
Trichloroethylene
zero
0.005
Liver problems; increased risk of cancer
Discharge from metal degreasing sites and other factories
Vinyl chloride
zero
0.002
Increased risk of cancer
Leaching from PVC pipes; discharge from plastic factories
Xylenes (total)
10
10
Nervous system damage
Discharge from petroleum factories; discharge from chemical factories
