Runoff from landfills; discharge of waste Polychlorinated biphenyls 500 0 chemicals; residue of (PCBs) (ppt) banned use in electrical transformers Discharge from wood Pentachlorophenol (ppb) 1 0 preserving factories Picloram (ppb) 500 500 Runoff from herbicide use Simazine (ppb) 4 4 Runoff from herbicide use Runoff/leaching from Toxaphene (ppb) 3 0 insecticide used on cotton and cattle Volatile Organic Contaminants Discharge from factories; Benzene (ppb) 5 0 leaching from gas storage tanks and landfills Discharge from chemical Carbon tetrachloride (ppb) 5 0 plants and other industrial activities Discharge from and Chlorobenzene (ppb) 100 100 agricultural chemical factories Discharge from industrial o-Dichlorobenzene (ppb) 600 600 chemical factories Discharge from industrial p-Dichlorobenzene (ppb) 5 5 chemical factories Discharge from industrial 1,2-Dichloroethane (ppb) 5 0 chemical factories 1,1-Dichloroethylene Discharge from industrial 7 7 (ppb) chemical factories Breakdown product of cis-1,2-Dichloroethylene 70 70 trichloroethylene and (ppb) tetrachloroethylene Discharge from industrial 100 100 (ppb) chemical factories Discharge from Dichloromethane (ppb) 5 0 pharmaceutical and chemical factories Discharge from industrial 1,2-Dichloropropane (ppb) 5 0 chemical factories Leaks and spills from Ethylbenzene (ppb) 700 700 gasoline and petroleum storage tanks Discharge from rubber Styrene (ppb) 100 100 and plastic factories; leaching from landfills Discharge from factories Tetrachloroethylene 5 0 and dry cleaners; residual (PCE) (ppb) of vinyl-lined water mains 1,2,4-Triclorobenzene Discharge from 70 70 (ppb) factories 1,1,1-Trichloroethane Discharge from use in 200 200 (ppb) septic system cleaners 1,1,2-Trichloroethane Discharge from industrial 5 3 (ppb) chemical factories
Polychlorinated biphenyls (PCBs) (ppt) 500 0 Runoff from landfills; discharge of waste chemicals; residue of banned use in electrical transformers Pentachlorophenol (ppb) 1 0 Discharge from wood preserving factories Picloram (ppb) 500 500 Runoff from herbicide use Simazine (ppb) 4 4 Runoff from herbicide use Toxaphene (ppb) 3 0 Runoff/leaching from insecticide used on cotton and cattle Volatile Organic Contaminants Benzene (ppb) 5 0 Discharge from factories; leaching from gas storage tanks and landfills Carbon tetrachloride (ppb) 5 0 Discharge from chemical plants and other industrial activities Chlorobenzene (ppb) 100 100 Discharge from and agricultural chemical factories o-Dichlorobenzene (ppb) 600 600 Discharge from industrial chemical factories p-Dichlorobenzene (ppb) 5 5 Discharge from industrial chemical factories 1,2-Dichloroethane (ppb) 5 0 Discharge from industrial chemical factories 1,1-Dichloroethylene (ppb) 7 7 Discharge from industrial chemical factories cis-1,2-Dichloroethylene (ppb) 70 70 Breakdown product of trichloroethylene and tetrachloroethylene (ppb) 100 100 Discharge from industrial chemical factories Dichloromethane (ppb) 5 0 Discharge from pharmaceutical and chemical factories 1,2-Dichloropropane (ppb) 5 0 Discharge from industrial chemical factories Ethylbenzene (ppb) 700 700 Leaks and spills from gasoline and petroleum storage tanks Styrene (ppb) 100 100 Discharge from rubber and plastic factories; leaching from landfills Tetrachloroethylene (PCE) (ppb) 5 0 Discharge from factories and dry cleaners; residual of vinyl-lined water mains 1,2,4-Triclorobenzene (ppb) 70 70 Discharge from factories 1,1,1-Trichloroethane (ppb) 200 200 Discharge from use in septic system cleaners 1,1,2-Trichloroethane (ppb) 5 3 Discharge from industrial chemical factories