Radioactive Contaminants(6) Alpha emitters (pCi/l) - Erosion of natural deposits.
(7) Beta/photon emitters (mrem/yr) - Decay of natural and artificial deposits.
(8) Combined radium (pCi/l) - Erosion of natural deposits.
(9) Uranium (ug/l) - Erosion of natural deposits.
Inorganic Contaminants
(10) Antimony (ppb) - Discharge from petroleum refineries; fire retardants; ceramics; electronics; solder.
(11) Arsenic (ppb) - Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes.
(12) Asbestos (MFL) - Decay of asbestos cement water mains; Erosion of natural deposits.
(13) Barium (ppm) - Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits.
(14) Beryllium (ppb) - Discharge from metal refineries and coal-burning factories; Discharge from electrical, aerospace, and defense industries.
(15) Cadmium (ppb) - Corrosion of galvanized pipes; Erosion of natural deposits; Discharge from metal refineries; runoff from waste batteries and paints.
(16) Chromium (ppb) - Discharge from steel and pulp mills; Erosion of natural deposits.
(17) Copper (ppm) - Corrosion of household plumbing systems; Erosion of natural deposits; Leaching from wood preservatives.
(18) Cyanide (ppb) - Discharge from steel or metal factories; Discharge from plastic and fertilizer factories.
(19) Fluoride (ppm) - Erosion of natural deposits; Water additive which promotes strong teeth; Discharge from fertilizer and aluminum factories.
(20) Lead (ppb) - Corrosion of household plumbing systems; Erosion of natural deposits.
(21) Mercury (inorganic) (ppb) - Erosion of natural deposits; Discharge from refineries and factories; Runoff from landfills; Runoff from cropland.
(22) Nitrate (as Nitrogen) (ppm) - Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits.
(23) Nitrite (as Nitrogen) (ppm) - Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits.
(24) Selenium (ppb) - Discharge from petroleum and metal refineries; Erosion of natural deposits; Discharge from mines.
(25) Thallium (ppb) - Leaching from ore-processing sites; Discharge from electronics, glass, and drug factories. Synthetic Organic Contaminants including Pesticides and Herbicides
(26) 2,4-D (ppb) - Runoff from herbicide used on row crops.
(27) 2,4,5-TP (Silvex)(ppb) - Residue of banned herbicide.
(28) Acrylamide - Added to water during sewage or wastewater treatment.
(29) Alachlor (ppb) - Runoff from herbicide used on row crops.
(30) Atrazine (ppb) - Runoff from herbicide used on row crops.
(31) Benzo(a)pyrene (PAH) (nanograms/l) -Leaching from linings of water storage tanks and distribution lines.
(32) Carbofuran (ppb) - Leaching of soil fumigant used on rice and alfalfa.
(33) Chlordane (ppb) - Residue of banned termiticide.
(34) Dalapon (ppb) - Runoff from herbicide used on rights of way.
(35) Di(2-ethylhexyl) adipate (ppb) - Discharge from chemical factories.
(36) Di(2-ethylhexyl) phthalate (ppb) - Discharge from rubber and chemical factories.
(37) Dibromochloropropane (ppt) - Runoff or leaching from soil fumigant used on soybeans, cotton, pineapples, and orchards.
(38) Dinoseb (ppb) - Runoff from herbicide used on soybeans and vegetables.
(39) Diquat (ppb) - Runoff from herbicide use.
(40) Dioxin (2,3,7,8-TCDD) (ppq) - Emissions from waste incineration and other combustion; Discharge from chemical factories.
(41) Endothall (ppb) - Runoff from herbicide use.
(42) Endrin (ppb) - Residue of banned insecticide.
(43) Epichlorohydrin - Discharge from industrial chemical factories; An impurity of some water treatment chemicals.
(44) Ethylene dibromide (ppt) - Discharge from petroleum refineries.
(45) Glyphosate (ppb) - Runoff from herbicide use.
(46) Hazard Index PFAS (HFPO-DA, PFBS, PFHxS, and PFNA) - Discharge from manufacturing and industrial chemical facilities, use of certain consumer products, occupational exposures, and certain firefighting activities.
(47) Heptachlor (ppt) - Residue of banned pesticide.
(48) Heptachlor epoxide (ppt) - Breakdown of heptachlor.
(49) Hexachlorobenzene (ppb) - Discharge from metal refineries and agricultural chemical factories.
(50) Hexachlorocyclopentadiene (ppb) - Discharge from chemical factories.
(51) HFPO-DA (hexafluoropropylene oxide dimer acid) (ng/l)- Discharge from manufacturing and industrial chemical facilities, use of certain consumer products, occupational exposures, and certain firefighting activities.