California
2,942 Utilities
Serving: 43,763,000
Data available: 2010-2015
Contaminants Found: 178
EWG's drinking water quality report for California shows results of tests conducted by the water utilities in California and provided to EWG by the California State Water Resources Control Board.
Below are utilities in California serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.
Large utilities in California
Utilities that accumulated/accrued the most violation points as of October 2015 to September 2018 in California
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
Large utilities that accumulated/accrued the most violation points as of October 2015 to September 2018 in California
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
| Utility | Location | People Served | Violation Points |
|---|---|---|---|
| Arvin Community Services District | Arvin, CA | 19,000 | 95 |
| City of Lemoore | Lemoore, CA | 24,945 | 85 |
| City of Lindsay | Lindsay, CA | 13,445 | 45 |
| Lamont Public Utility District | Bakersfield, CA | 18,290 | 35 |
| City of Imperial | Imperial, CA | 16,145 | 30 |
| California Institution For Men | Chino, CA | 10,667 | 10 |
| City of Livingston | Livingston, CA | 14,894 | 6 |
| Camp Pendleton (North) | Camp Pendleton, CA | 15,600 | 5 |
| Ventura Water Department | Ventura, CA | 112,677 | 5 |
| Camp Pendleton (South) | Camp Pendleton, CA | 39,400 | 5 |
| City of Kingsburg | Kingsburg, CA | 11,504 | 5 |
| East Valley Water District | Highland, CA | 87,000 | 5 |
| South Gate Water Department | South Gate, CA | 96,057 | 4 |
| Fillmore Water Department | Fillmore, CA | 15,222 | 1 |
| Suisun-Solano Water Authority | Vacaville, CA | 28,856 | 1 |
| US Army Fort Irwin | Fort Irwin, CA | 16,000 | 1 |
| City of Roseville | Roseville, CA | 119,000 | 1 |
| City of Anderson | Anderson, CA | 11,127 | 1 |
| City of Orange | Orange, CA | 138,640 | 1 |
| Lakeside WD | Lakeside, CA | 42,200 | 1 |
| Lynwood Water Department | Lynwood, CA | 71,297 | 1 |
| City of Modesto, Salida | Modesto, CA | 24,440 | 1 |
Contaminants found in California above health guidelines
| Found above health guidelines | Found | ||||||
|---|---|---|---|---|---|---|---|
| Contaminant | # of Utilities | People Served | # of Utilities | People Served | |||
Total trihalomethanes (TTHMs) | 1,101 | 40,799,778 | 1,167 | 42,360,438 | |||
Chromium (hexavalent) | 1,321 | 38,520,487 | 1,355 | 39,785,134 | |||
Bromodichloromethane | 892 | 33,452,796 | 901 | 34,196,785 | |||
Dibromochloromethane | 861 | 32,947,738 | 879 | 34,403,916 | |||
Chloroform | 755 | 31,267,301 | 822 | 34,136,827 | |||
Bromoform | 706 | 29,111,630 | 802 | 33,195,743 | |||
Uranium | 873 | 28,086,033 | 925 | 30,159,336 | |||
Dichloroacetic acid | 587 | 26,726,023 | 645 | 30,402,900 | |||
Trichloroacetic acid | 513 | 25,143,958 | 558 | 27,083,977 | |||
Arsenic | 722 | 23,188,641 | 722 | 23,188,641 | |||
Bromate | 98 | 10,559,416 | 100 | 10,588,306 | |||
Radium-226 | 172 | 10,548,877 | 195 | 11,842,355 | |||
Radium-228 | 268 | 8,056,272 | 268 | 8,056,272 | |||
Chlorate | 101 | 7,775,508 | 560 | 39,972,896 | |||
Radon | 97 | 4,664,349 | 97 | 4,664,349 | |||
Tetrachloroethylene (perchloroethylene) | 78 | 3,790,388 | 92 | 8,932,028 | |||
1,2-Dibromo-3-chloropropane (DBCP) | 85 | 3,410,147 | 90 | 3,761,631 | |||
Nitrate | 308 | 3,285,547 | 1,754 | 32,405,560 | |||
1,2,3-Trichloropropane | 69 | 2,887,958 | 78 | 7,275,378 | |||
1,4-Dioxane | 50 | 2,757,955 | 200 | 17,744,976 | |||
Chlorite | 9 | 2,133,002 | 9 | 2,133,002 | |||
Perfluorooctane sulfonate (PFOS) | 20 | 1,998,273 | 20 | 1,998,273 | |||
Trichloroethylene | 35 | 1,841,987 | 67 | 8,192,604 | |||
Perfluorooctanoic acid (PFOA) | 22 | 1,557,883 | 22 | 1,557,883 | |||
Manganese | 158 | 1,526,877 | 609 | 12,984,741 | |||
Vanadium | 85 | 1,277,293 | 887 | 39,454,509 | |||
Strontium-90 | 13 | 938,369 | 70 | 3,663,914 | |||
N-Nitrosodimethylamine (NDMA) | 11 | 809,042 | 41 | 1,948,702 | |||
Nitrate and nitrite | 9 | 563,790 | 73 | 3,169,693 | |||
Perfluorohexane sulfonate (PFHXS) | 5 | 460,593 | 7 | 641,634 | |||
Perchlorate | 22 | 410,838 | 45 | 2,473,118 | |||
Perfluoroheptanoic acid (PFHPA) | 5 | 311,368 | 9 | 715,979 | |||
Carbon tetrachloride | 4 | 208,689 | 4 | 208,689 | |||
Benzo[a]pyrene | 10 | 136,463 | 10 | 136,463 | |||
Cadmium | 17 | 82,641 | 50 | 1,365,053 | |||
Ethylene dibromide | 3 | 69,106 | 7 | 621,948 | |||
Aluminum | 10 | 59,819 | 343 | 15,632,753 | |||
Benzene | 3 | 46,360 | 4 | 46,446 | |||
Strontium | 3 | 43,301 | 552 | 38,021,261 | |||
Molybdenum | 3 | 17,527 | 496 | 35,790,648 | |||
Thallium | 3 | 3,283 | 17 | 659,466 | |||
Antimony | 7 | 3,261 | 31 | 1,259,187 | |||
Selenium | 5 | 1,284 | 184 | 3,768,945 | |||
Beryllium | 2 | 1,240 | 22 | 978,260 | |||
Chloromethane | 2 | 705 | 82 | 3,182,755 | |||
Di(2-ethylhexyl) phthalate | 1 | 66 | 1 | 66 | |||
Tritium | 1 | 64 | 38 | 1,648,986 | |||
Barium | 1 | 51 | 620 | 20,162,544 | |||
Mercury (inorganic) | 1 | 44 | 32 | 733,454 | |||
1,2-Dichloropropane | 1 | 35 | 3 | 104,768 | |||
Contaminants found in California above legal limits
| Contaminant | # of Utilities | People Served | |
|---|---|---|---|
Total trihalomethanes (TTHMs) | 39 | 109,491 | |
Arsenic | 103 | 95,472 | |
Nitrate and nitrite | 2 | 93,385 | |
Nitrate | 33 | 37,656 | |
Trichloroethylene | 1 | 32,230 | |
Haloacetic acids (HAA5) | 21 | 22,709 | |
Fluoride | 4 | 17,339 | |
1,2-Dibromo-3-chloropropane (DBCP) | 2 | 13,883 | |
Uranium | 36 | 12,992 | |
Tetrachloroethylene (perchloroethylene) | 1 | 7,000 | |
Antimony | 1 | 139 | |
Radium, combined (-226 & -228) | 1 | 120 | |
Selenium | 1 | 75 | |
Nitrite | 1 | 65 |