Public Water Systems
7,249 active public water systems in CA, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Del Rio Mutual | El Monte, CA | 700 | 18 | - |
| Spartan Veterinary Services | Anza, CA | 700 | 15 | - |
| Mc Clellan MHP | North Highlands, CA | 700 | 11 | - |
| Rainbo Beach | Needles, CA | 700 | 15 | - |
| Laureate Water Company | San Luis Obispo, CA | 700 | 14 | - |
| Cuyama Community Services District | New Cuyama, CA | 700 | 61 | - |
| Anderson Union High School | Anderson, CA | 700 | 20 | - |
| Junction School District | Palo Cedro, CA | 700 | 10 | - |
| Black Butte Lake, Buckhorn Ra, Uscoe | Orland, CA | 700 | 6 | - |
| Fort Jones, Town Of | Fort Jones, CA | 695 | 25 | - |
| Elkhorn School WS | Salinas, CA | 694 | 16 | - |
| Linnell Farm Labor Center | Visalia, CA | 694 | 13 | - |
| Loch Lomond Mutual Water Co | Cobb, CA | 693 | 26 | - |
| Cuyamaca Sp - Paso Picacho | Julian, CA | 691 | 12 | - |
| Moon Valley Water System | Sonoma, CA | 691 | 4 | - |
| Seville Water Company | Visalia, CA | 691 | 44 | - |
| Crown Pointe Estates at Malibu, LLC | Paso Robles, CA | 690 | 11 | - |
| Snowshoe Springs Assn. | Arnold, CA | 686 | 10 | - |
| Hemlock Mutual Water Co. | El Monte, CA | 686 | 76 | - |
| Humboldt Bay MWD | Eureka, CA | 680 | 2 | - |
| El Camino Real WS #16 | Salinas, CA | 679 | 18 | - |
| Lewiston Community Services District | Junction City, CA | 677 | 84 | - |
| Lee Vining Public Utility District | Lee Vining, CA | 672 | 3 | - |
| Lake Morena's Oak Shores MWC | Campo, CA | 670 | 179 | - |
| Alianza Charter School/Wcsa | Watsonville, CA | 670 | 17 | - |
| Csp - Rancho del Oso | Felton, CA | 669 | 20 | - |
| Cal Am - Walnut Grove | Sacramento, CA | 667 | 2 | - |
| Brandeis Bardin Institute | Simi Valley, CA | 665 | 14 | - |
| Center Water Co | Lucerne Valley, CA | 662 | 5 | - |
| Whiskeytown Nra-Whiskey Creek | Whiskeytown, CA | 662 | 0 | - |
| El Dorado Mutual Water Co. | Palmdale, CA | 660 | 12 | - |
| Kelly's Market | Newberry Springs, CA | 660 | 0 | - |
| Pinnacles National Park-East District | Paicines, CA | 658 | 6 | - |
| Gasquet C.s.d. | Gasquet, CA | 657 | 7 | - |
| Lily of the Valley Mobile Village | Saugus, CA | 657 | 6 | - |
| Del Oro Traver District | Chico, CA | 657 | 29 | - |
| Cedar Lodge Resort | Watsonville, CA | 656 | 77 | - |
| Rush Ranch Open Space | Vacaville, CA | 656 | 0 | - |
| Prunedale School WS | Salinas, CA | 655 | 31 | - |
| Big Bend Resort | Parker, CA | 655 | 31 | - |
| Cdpr Four Rivers District-San Luis Creek | Columbia, CA | 653 | 14 | - |
| San Antonio Lake Park South WS | Salinas, CA | 653 | 50 | - |
| Placer CSA - Sheridan | Auburn, CA | 653 | 4 | - |
| Tokay Park Water Co | Sacramento, CA | 653 | 18 | - |
| Domaine Carneros | Napa, CA | 652 | 8 | - |
| Big Rock C.s.d. | Crescent City, CA | 650 | 48 | - |
| Sun Empire School | Kerman, CA | 650 | 24 | - |
| Sunbeam Lake RV Resort | El Centro, CA | 650 | 8 | - |
| Eastside Union School District | Lancaster, CA | 650 | 8 | - |
| The Morning Star Packing Company | Los Banos, CA | 650 | 7 | - |