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 |
| The Willows Resort | Monterey, CA | 57 | 28 | - |
| Fog Crest Winery | Sebastopol, CA | 57 | 0 | - |
| 7180 Hwy 116 LLC | Ukiah, CA | 57 | 0 | - |
| Ektimo Vineyards | Sebastopol, CA | 57 | 12 | - |
| Bricoleur Vineyards | San Francisco, CA | 57 | 0 | - |
| Huckleberry Water Development | Danville, CA | 56 | 24 | - |
| Usfs/Trimmer Work Center | Clovis, CA | 56 | 78 | - |
| Pg&e Balch Camp | Auberry, CA | 56 | 45 | - |
| Rock Creek Lakes Resort | Bishop, CA | 56 | 5 | - |
| Fourth Street Water System | Lake Isabella, CA | 56 | 80 | - |
| William Fisher Memorial Water Company | Mojave, CA | 56 | 144 | - |
| Hart Flat Bear Mutual Water | Bakersfield, CA | 56 | 11 | - |
| Innisfree Water Company | Kelseyville, CA | 56 | 6 | - |
| Lahontan Heights Home. Assoc. | Janesville, CA | 56 | 4 | - |
| Blue Skies Trailor Park | Arcadia, CA | 56 | 2 | - |
| Winterhaven Mobile Estates | Lake Hughes, CA | 56 | 76 | - |
| Outward Bound California | Midpines, CA | 56 | 7 | - |
| Albion Mutual Water Company | Albion, CA | 56 | 6 | - |
| Point of View Mutual Water Co | Mendocino, CA | 56 | 8 | - |
| Seafoam Lodge | Little River, CA | 56 | 11 | - |
| Jost Post WA | Salinas, CA | 56 | 37 | - |
| Desmond RD WS #03 | Salinas, CA | 56 | 42 | - |
| Green Acres WA | Castroville, CA | 56 | 46 | - |
| Graves School WS | Salinas, CA | 56 | 2 | - |
| Belk Farms | Thermal, CA | 56 | 5 | - |
| Ivanpah Solar Thermal Power Plant | Carlsbad, CA | 56 | 2 | - |
| Raudel Delgado Water System | Manteca, CA | 56 | 14 | - |
| Booker Winery | Paso Robles, CA | 56 | 0 | - |
| Redwood Terrace Mutual | La Honda, CA | 56 | 137 | - |
| Vajrayana Foundation | Watsonville, CA | 56 | 36 | - |
| Sid - Peabody | Vacaville, CA | 56 | 0 | - |
| Lichau Hylands Mutual Water Company | Penngrove, CA | 56 | 0 | - |
| Tully Mobile Estates | Oakdale, CA | 56 | 4 | - |
| Mineral Homeowner's Assn | Durham, CA | 56 | 6 | - |
| Humboldt Woodlands Mutual | Forsest Ranch, CA | 55 | 8 | - |
| McAvoy Yacht Harbor | Byron, CA | 55 | 4 | - |
| Idylwilde Tract Association | Arvin, CA | 55 | 32 | - |
| Viking RV Park | Kingsburg, CA | 55 | 28 | - |
| Foster Farms - Cedar Hatchery | Livingston, CA | 55 | 5 | - |
| Cardinal Village Resort | Bishop, CA | 55 | 20 | - |
| Sierra Cascade Nursery | Susanville, CA | 55 | 1 | - |
| Little Baldy Water | Llano, CA | 55 | 9 | - |
| Wagon Wheel Plaza | Los Angeles, CA | 55 | 19 | - |
| Buck Ridge Hensley Lake | Raymond, CA | 55 | 2 | - |
| Usfs - Dry Gulch/Dirt Flat Campground | Phoenix, CA | 55 | 4 | - |
| Mariposa County Public Works Department | Mariposa, CA | 55 | 36 | - |
| Musd -Coulterville - Greeley Hill School | Mariposa, CA | 55 | 4 | - |
| Gemperle Egg Ranch | Turlock, CA | 55 | 39 | - |
| Yosemite Valley Beef Packing Co Inc | Merced, CA | 55 | 24 | - |
| Del Monte Farms RD WS #03 | Castroville, CA | 55 | 27 | - |