Alachlor
MCL	0.002 mg/l
Risks or effects	Probable cause of cancer, damage to eyes and liver
Sources	Agricultural herbicide
Treatment	Activated Carbon

Atrazine
MCL	0.003 mg/l
Risks or effects	Mammary gland tumors
Sources	Herbicide
Treatment	Activated Carbon

Benzo(a)pyrene
MCL	0.0002 mg/l
Risks or effects	Cancer
Sources	Coal tar coating, burning organic matter, volcanoes, fossil fuels
Treatment	Activated Carbon

Carbofuran
MCL	0.04 mg/l
Risks or effects	Nervous, reproductive system effects, probable cause of cancer
Sources	Pesticide
Treatment	Activated Carbon

Chlordane
MCL	0.0002 mg/l
Risks or effects	Probable cause of cancer
Sources	Pesticide, leaching from soil treatment for termites
Treatment	Activated Carbon

Dalapon
MCL	0.2 mg/l
Risks or effects	Liver and kidney damage, probable cause of cancer
Sources	Herbicide on orchards, beans, coffee, lawns road/railways
Treatment	Activated Carbon

Dibromochloropropane (DBCP)
MCL	0.1 mg/l
Risks or effects	Probable cause of cancer
Sources	Soil fumigant on soybeans, cotton, pineapple and orchards
Treatment	Activated Carbon

2,4-Dichlorophenoxyacetic Acid (2-4 D)
MCL	0.07 mg/l
Risks or effects	Liver and kidney damage, skin irritations, muscle effects, probable cause of cancer
Sources	Agricultural herbicide, aquatic weed control
Treatment	Activated Carbon

Di(2-ethylhexyl)-Adipate
MCL	0.4 mg/l
Risks or effects	Decreased body weight, liver and testes damage, probable cause of cancer
Sources	Synthetic rubber, food packaging, cosmetics
Treatment	Activated Carbon

Di(2-ethylhexyl)-Phthalate
MCL	0.006 mg/l
Risk or effect	Probable cause of cancer
Sources	PVC and other plastics
Treatment	Activated Carbon

2,3,7,8-TCDD (Dioxin)
MCL	0.00000003 mg/l
Risks or effects	Carcinogen, mutagen, tetragen
Sources	Impurity in herbicides Chemical production by-product
Treatment	Activated Carbon

Ethylene Dibromide (EDB)
MCL	0.00005 mg/l
Risks or effects	Probable cause of cancer
Sources	Leaching of soil fumigant Leaded gas additives
Treatment	Activated Carbon , Aeration

Dinoseb
MCL	0.007 mg/l
Risks or effects	Thyroid, reproductive organ damage, probable cause of cancer
Sources	Runoff of herbicide from crop and non-crop applications
Treatment	Activated Carbon

Diquat
MCL	0.02 mg/l
Risks or effects	Liver, kidney and eye effects, probable cause of cancer
Sources	Runoff of herbicide on land and aquatic weeds
Treatment	Activated Carbon

Endothall
MCL	0.1 mg/l
Risks or effects	Liver, kidney and gastrointestinal damage, probable cause of cancer
Sources	Herbicide on crops, land/aquatic weeds, rapidly degraded
Treatment	Activated Carbon

Endrin
MCL	0.002 mg/l
Risks or effects	Liver, kidney and heart damage, probable cause of cancer
Sources	Pesicide on insects, rodents, birds, restricted since 1980
Treatment	Activated Carbon

Glyphosate
MCL	0.7 mg/l
Risks or effects	Liver, kidney damage
Sources	Herbicide on grasses, weeds, brush
Treatment	Activated Carbon

Heptachlor
MCL	0.004 mg/l
Risks or effects	Probable cause of cancer
Sources	Leaching of insecticide for termites, very few crops
Treatment	Activated Carbon

Heptachlor Epoxide
MCL	0.003 mg/l
Risks or effects	Probable cause of cancer
Sources	Biodegradation of heptachlor
Treatment	Activated Carbon

Hexachlorobenzene
MCL	0.001 mg/l
Risks or effects	Cancer
Sources	Impurity in manufacturing sovents and pesticides by product
Treatment	Activated Carbon

Hexachlorocyclo-Pentadiene
MCL	0.05 mg/l
Risks or effects	Kidney and stomach damage
Sources	Pesticide production intermediate
Treatment	Activated Carbon ; Aeration

Lindane
MCL	0.0002 mg/l
Risks or effects	Liver, kidney, nerve, immune and circulatory damage
Sources	Insecticide on cattle, lumber, gardens, restricted by U.S. EPA 1987
Treatment	Activated Carbon

Methoxychlor
MCL	0.04 mg/l
Risks or effects	Growth. liver, kidney, nerve effects
Sources	Insecticide for fruits, vegetables, alfalfa, livestock, pets
Treatment	Activated Carbon

Oxamyl(vydate)
MCL	0.2 mg/l
Risks or effects	Kidney damage, probable cause of cancer
Sources	Insecticide on apples, potatoes, tomatoes
Treatment	Activated Carbon

Pentachlorophenol
MCL	0.05 mg/l
Risks or effects	Probable cause of cancer, liver and kidney effects
Sources	Herbicide Wood preservatives, cooling tower wastes
Treatment	Activated Carbon

Picloram
MCL	0.5 mg/l
Risks or effects	Kidney and liver damage
Sources	Herbicide on broadleaf and wood plants
Treatment	Activated Carbon

Polychlorinated Biphenyls (PCBs)
MCL	0.0005 mg/l
Risks or effects	Probable cause of cancer, liver damage
Sources	Hazardous waste sites, leaking transformers
Treatment	Activated Carbon

Simazine
MCL	0.07 mg/l
Risks or effects	Probable cause of cancer
Sources	Herbicide on grass sod, some crops, aquatic algae
Treatment	Activated Carbon

Silvex 2,4,5-TP
MCL	0.05 mg/l
Risks or effects	Liver and kidney damage, probable cause of cancer
Sources	Herbicide on crops, right-of-way, golf courses, cancelled by U.S. EPA 1985
Treatment	Activated Carbon

Toxaphene
MCL	0.003 mg/l
Risks or effects	Probable cause of cancer
Sources	Insecticide on cattle, cotton soybeans, cancelled by U.S. EPA 1982
Treatment	Activated Carbon