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 |
| Greenheart Farms | Arroyo Grande, CA | 91 | 5 | - |
| Hoot Owl Creek/Alex. Valley Vineyards Jv | Healdsburg, CA | 91 | 8 | - |
| Silver Oak Wine Cellars LLC | Healdsburg, CA | 91 | 0 | - |
| Davis Migrant Center (Ciudad del Sol) | Woodland, CA | 91 | 9 | - |
| Usbr-Sldmwa - Cvp Jones Pumping Plant | Byron, CA | 90 | 0 | - |
| Merry Mountain Mutual | Clipper Mills, CA | 90 | 33 | - |
| Macs Old House | Moraga, CA | 90 | 12 | - |
| O'Neill Vintners & Distillers | Parlier, CA | 90 | 54 | - |
| True Organic Products | Spreckles, CA | 90 | 77 | - |
| Calwest Rain - Kerman | Raymond, CA | 90 | 8 | - |
| Rawson Creek Mutual Water Company | Bishop, CA | 90 | 10 | - |
| Gooselake Water Company | Bakersfield, CA | 90 | 35 | - |
| Sunnygem Hulling & Shelling Operations | Wasco, CA | 90 | 6 | - |
| Mettler County Water District | Bakersfield, CA | 90 | 49 | - |
| Clark Street Community Well | Lake Isabella, CA | 90 | 46 | - |
| Blue Lakes Improvement Club | Upper Lake, CA | 90 | 5 | - |
| Acton Conservation Camp #11 | Los Angeles, CA | 90 | 11 | - |
| B K Lighting Inc | Madera, CA | 90 | 53 | - |
| San Joaquin Wine Company | Madera, CA | 90 | 126 | - |
| Nick's Cove | Marshall, CA | 90 | 4 | - |
| Lake View Mutual Water Co. | Redwood Valley, CA | 90 | 28 | - |
| Mendocino Presbyterian Church | Mendocino, CA | 90 | 0 | - |
| Bridgeport Reservoir Marina and Cg | Bridgeport, CA | 90 | 14 | - |
| Spring Canyon WA | Salinas, CA | 90 | 51 | - |
| Mesa del Toro MWC | Salinas, CA | 90 | 97 | - |
| Prunedale Plaza WS | Modesto, CA | 90 | 23 | - |
| Tularcitos MWC | Carmel Valley, CA | 90 | 54 | - |
| Linda Vista Mutual Water Co | Angwin, CA | 90 | 4 | - |
| Shady Lake Water Association | North San Juan, CA | 90 | 44 | - |
| Camp Timberwolf | Moraga, CA | 90 | 7 | - |
| Pnf Lighting Tree Cg | Quincy, CA | 90 | 15 | - |
| Anza Pines Mobile Home Park | Anza, CA | 90 | 44 | - |
| Desert Sage Youth Wellness Center | Hemet, CA | 90 | 0 | - |
| Magnolia Mutual Water | Courtland, CA | 90 | 52 | - |
| Vineyard Estates MWC | Hollister, CA | 90 | 30 | - |
| West End MWC | Lucerne Valley, CA | 90 | 7 | - |
| Portola Improvement Association MWC | La Honda, CA | 90 | 53 | - |
| Z Best Products | Gilroy, CA | 90 | 4 | - |
| Village Green | Anderson, CA | 90 | 13 | - |
| West Cottonwood Apartments | Sacramento, CA | 90 | 14 | - |
| Airport Industrial Park | Beverly Hills, CA | 90 | 13 | - |
| South Cloverdale Water Company | Cloverdale, CA | 90 | 17 | - |
| Blue Spruce Mobile Home Park | Sacramento, CA | 90 | 12 | - |
| Stonestreet Winery | Healdsburg, CA | 90 | 5 | - |
| Wood Colony Christian School | Modesto, CA | 90 | 11 | - |
| Coe Orchard Equipment | Live Oak, CA | 90 | 3 | - |
| Vina Elementary School | Vine, CA | 90 | 11 | - |
| Saddleback Mutual Water Co. | Redding, CA | 90 | 12 | - |
| Rancho Tehama Elem School | Corning, CA | 90 | 2 | - |
| Mary Smith Campground | Redding, CA | 90 | 0 | - |