1. (1) Total Coliform Bacteria - Naturally present in the environment.
2. (2) E. coli - Human and animal fecal waste.
3. (3) Fecal Indicators (enterococci or coliphage) - Human and animal fecal waste.
4. (4) Turbidity- Soil runoff.

5. (5) Total organic carbon - Naturally present in the environment.

   Radioactive Contaminants

6. (6) Alpha emitters (pCi/l) - Erosion of natural deposits.
7. (7) Beta/photon emitters (mrem/yr) - Decay of natural and man-made deposits.
8. (8) Combined radium (pCi/l) - Erosion of natural deposits.

9. (9) Uranium (ug/l) - Erosion of natural deposits.

   Inorganic Contaminants

10. (10) Antimony (ppb) - Discharge from petroleum refineries; fire retardants; ceramics; electronics; solder.
11. (11) Arsenic (ppb) - Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes.
12. (12) Asbestos (MFL) - Decay of asbestos cement water mains; Erosion of natural deposits.
13. (13) Barium (ppm) - Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits.
14. (14) Beryllium (ppb) - Discharge from metal refineries and coal-burning factories; Discharge from electrical, aerospace, and defense industries.
15. (15) Cadmium (ppb) - Corrosion of galvanized pipes; Erosion of natural deposits; Discharge from metal refineries; runoff from waste batteries and paints.
16. (16) Chromium (ppb) - Discharge from steel and pulp mills; Erosion of natural deposits.
17. (17) Copper (ppm) - Corrosion of household plumbing systems; Erosion of natural deposits; Leaching from wood preservatives.
18. (18) Cyanide (ppb) - Discharge from steel/metal factories; Discharge from plastic and fertilizer factories.
19. (19) Fluoride (ppm) - Erosion of natural deposits; Water additive which promotes strong teeth; Discharge from fertilizer and aluminum factories.
20. (20) Lead (ppb) - Corrosion of household plumbing systems; Erosion of natural deposits.
21. (21) Mercury (inorganic) (ppb) - Erosion of natural deposits; Discharge from refineries and factories; Runoff from landfills; Runoff from cropland.
22. (22) Nitrate (as Nitrogen) (ppm) - Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits.
23. (23) Nitrite (as Nitrogen) (ppm) - Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits.
24. (24) Selenium (ppb) - Discharge from petroleum and metal refineries; Erosion of natural deposits; Discharge from mines.
25. (25) Thallium (ppb) - Leaching from ore-processing sites; Discharge from electronics, glass, and drug factories. Synthetic Organic Contaminants including Pesticides and Herbicides
26. (26) 2,4-D (ppb) - Runoff from herbicide used on row crops.
27. (27) 2,4,5-TP (Silvex)(ppb) - Residue of banned herbicide.
28. (28) Acrylamide - Added to water during sewage/wastewater treatment.
29. (29) Alachlor (ppb) - Runoff from herbicide used on row crops.
30. (30) Atrazine (ppb) - Runoff from herbicide used on row crops.
31. (31) Benzo(a)pyrene (PAH) (nanograms/l) -Leaching from linings of water storage tanks and distribution lines.
32. (32) Carbofuran (ppb) - Leaching of soil fumigant used on rice and alfalfa.
33. (33) Chlordane (ppb) - Residue of banned termiticide.
34. (34) Dalapon (ppb) - Runoff from herbicide used on rights of way.
35. (35) Di(2-ethylhexyl) adipate (ppb) - Discharge from chemical factories.
36. (36) Di(2-ethylhexyl) phthalate (ppb) - Discharge from rubber and chemical factories.
37. (37) Dibromochloropropane (ppt) - Runoff/leaching from soil fumigant used on soybeans, cotton, pineapples, and orchards.
38. (38) Dinoseb (ppb) - Runoff from herbicide used on soybeans and vegetables.
39. (39) Diquat (ppb) - Runoff from herbicide use.
40. (40) Dioxin (2,3,7,8-TCDD) (ppq) - Emissions from waste incineration and other combustion; Discharge from chemical factories.
41. (41) Endothall (ppb) - Runoff from herbicide use.
42. (42) Endrin (ppb) - Residue of banned insecticide.
43. (43) Epichlorohydrin - Discharge from industrial chemical factories; An impurity of some water treatment chemicals.
44. (44) Ethylene dibromide (ppt) - Discharge from petroleum refineries.
45. (45) Glyphosate (ppb) - Runoff from herbicide use.
46. (46) Heptachlor (ppt) - Residue of banned pesticide.
47. (47) Heptachlor epoxide (ppt) - Breakdown of heptachlor.
48. (48) Hexachlorobenzene (ppb) - Discharge from metal refineries and agricultural chemical factories.
49. (49) Hexachlorocyclopentadiene (ppb) - Discharge from chemical factories.
50. (50) Lindane (ppt) - Runoff/leaching from insecticide used on cattle, lumber, gardens.
51. (51) Methoxychlor (ppb) - Runoff/leaching from insecticide used on fruits, vegetables, alfalfa, livestock.
52. (52) Oxamyl (Vydate)(ppb) - Runoff/leaching from insecticide used on apples, potatoes and tomatoes.
53. (53) PCBs (Polychlorinated biphenyls) (ppt) - Runoff from landfills; Discharge of waste chemicals.
54. (54) Pentachlorophenol (ppb) - Discharge from wood preserving factories.
55. (55) Picloram (ppb) - Herbicide runoff.
56. (56) Simazine (ppb) - Herbicide runoff.
57. (57) Toxaphene (ppb) - Runoff/leaching from insecticide used on cotton and cattle. Volatile Organic Contaminants
58. (58) Benzene (ppb) - Discharge from factories; Leaching from gas storage tanks and landfills.
59. (59) Bromate (ppb) - By-product of drinking water chlorination.
60. (60) Carbon tetrachloride (ppb) - Discharge from chemical plants and other industrial activities.
61. (61) Chloramines (ppm) - Water additive used to control microbes.
62. (62) Chlorine (ppm) - Water additive used to control microbes.
63. (63) Chlorite (ppm) - By-product of drinking water chlorination.
64. (64) Chlorine dioxide (ppb) - Water additive used to control microbes.
65. (65) Chlorobenzene (ppb) - Discharge from chemical and agricultural chemical factories.
66. (66) o-Dichlorobenzene (ppb) - Discharge from industrial chemical factories.
67. (67) p-Dichlorobenzene (ppb) - Discharge from industrial chemical factories.
68. (68) 1,2-Dichloroethane (ppb) - Discharge from industrial chemical factories.
69. (69) 1,1-Dichloroethylene (ppb) - Discharge from industrial chemical factories.
70. (70) cis-1,2-Dichloroethylene (ppb) - Discharge from industrial chemical factories.
71. (71) trans-1,2-Dichloroethylene (ppb) - Discharge from industrial chemical factories.
72. (72) Dichloromethane (ppb) - Discharge from pharmaceutical and chemical factories.
73. (73) 1,2-Dichloropropane (ppb) - Discharge from industrial chemical factories.
74. (74) Ethylbenzene (ppb) - Discharge from petroleum refineries.
75. (75) Haloacetic Acids (HAA) (ppb) - By-product of drinking water disinfection.
76. (76) Styrene (ppb)- Discharge from rubber and plastic factories; Leaching from landfills.
77. (77) Tetrachloroethylene (ppb) - Discharge from factories and dry cleaners.
78. (78) 1,2,4-Trichlorobenzene (ppb) - Discharge from textile-finishing factories.
79. (79) 1,1,1-Trichloroethane (ppb) - Discharge from metal degreasing sites and other factories.
80. (80) 1,1,2-Trichloroethane (ppb) - Discharge from industrial chemical factories.
81. (81) Trichloroethylene (ppb) - Discharge from metal degreasing sites and other factories.
82. (82) TTHMs (Total trihalomethanes)(ppb) - By-product of drinking water chlorination.
83. (83) Toluene (ppm) - Discharge from petroleum factories.
84. (84) Vinyl Chloride (ppb) - Leaching from PVC piping; Discharge from plastics factories.
85. (85) Xylenes (ppm) - Discharge from petroleum factories; Discharge from chemical factories.

Microbiological Contaminants

KEY: drinking water, consumer confidence report, water quality

Date of Last Change: January 15, 2019

Notice of Continuation: February 10, 2025

Authorizing, and Implemented or Interpreted Law: 19-4-104