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 |
| Bianchi Flowers Inc | Pescadero, CA | 65 | 9 | - |
| Burchell Road Water Association | Gilroy, CA | 65 | 39 | - |
| Uvas Pines RV Park | Morgan Hill, CA | 65 | 0 | - |
| Cal Fire-Deadwood Conservation Camp | Fort Jones, CA | 65 | 14 | - |
| Delta Conservation Camp | Suisun City, CA | 65 | 1 | - |
| Lone Pine Mutual Water Company | Sebastopol, CA | 65 | 9 | - |
| Evergreen Mobile Estates | Stockton, CA | 65 | 21 | - |
| Sebastiani Vineyards | Kenwood, CA | 65 | 7 | - |
| Kj Carneros Hills Winery | Sonoma, CA | 65 | 16 | - |
| 4N Mobilehome Park | Oakdale, CA | 65 | 12 | - |
| Liberty Baptist Church | Modesto, CA | 65 | 43 | - |
| Redding Odd Fellows Camp | Lewiston, CA | 65 | 13 | - |
| Community Mutual Water Co | Camarillo, CA | 65 | 6 | - |
| Full Belly Farm | Guinda, CA | 65 | 2 | - |
| Foothill Lions Club | Marysville, CA | 65 | 4 | - |
| Elm Court | Fresno, CA | 64 | 144 | - |
| St. Peters Catholic Cemetery | Fresno, CA | 64 | 4 | - |
| Palomino Estates Water Company | Garberville, CA | 64 | 36 | - |
| IV Desert Museum Society Inc. | Ocotillo, CA | 64 | 6 | - |
| Wegis Mutual Water Company | Bakersfield, CA | 64 | 39 | - |
| Silver Creek | Livermore, CA | 64 | 36 | - |
| Snelling Merced Falls School | Snelling, CA | 64 | 6 | - |
| Js West Milling Co Hilmar Ranch | Modesto, CA | 64 | 8 | - |
| Country Club County WD | Turlock, CA | 64 | 10 | - |
| Leafwood Community WA | Salinas, CA | 64 | 35 | - |
| Pioneer Place Mws | Aromas, CA | 64 | 59 | - |
| Titus Winery | St Helena, CA | 64 | 4 | - |
| Conn Creek Winery | Napa, CA | 64 | 4 | - |
| Silver Creek Summer Home Tract | Truckee, CA | 64 | 21 | - |
| Laurel Community League | Los Gatos, CA | 64 | 42 | - |
| Lockheed Martin Space Systems | Santa Cruz, CA | 64 | 15 | - |
| Lake Shasta Lodge | Lakehead, CA | 64 | 0 | - |
| Melita Heights Mutual Water Company | Santa Rosa, CA | 64 | 28 | - |
| Harris Moran Seed Company | Davis, CA | 64 | 1 | - |
| Mount Gilead Bible Conference | Windsor, CA | 64 | 9 | - |
| Chateau Diana | Healdsburg, CA | 64 | 6 | - |
| Gracianna Winery | Healdsburg, CA | 64 | 2 | - |
| Lone Pine MHP | Oakdale, CA | 64 | 14 | - |
| Frazier Nut Farms, Inc. | Waterford, CA | 64 | 117 | - |
| Pacific Woodtech | Red Bluff, CA | 64 | 16 | - |
| Indian Grinding Rock-Calaveras District | Columbia, CA | 63 | 0 | - |
| Richvale Elementary School | Biggs, CA | 63 | 23 | - |
| Highway 20 Trailer Park | Arbuckle, CA | 63 | 10 | - |
| Lake Chiquita Mutual Water Company | Oakland, CA | 63 | 42 | - |
| Mother Lode Water System | Coloma, CA | 63 | 6 | - |
| Seawood Estates Mutual Water Company | Trinidad, CA | 63 | 33 | - |
| J.g. Boswell Company Water System | Corcoran, CA | 63 | 59 | - |
| Merced Fruit Barn | Merced, CA | 63 | 0 | - |
| Lazy W Ranch Water System | San Juan Capistrano, CA | 63 | 5 | - |
| Madison Center Water System | San Marcos, CA | 63 | 8 | - |