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 |
| South Valley Farms-Beech Huller/Office | Wasco, CA | 75 | 6 | - |
| Kernvale Mutual Water Co | Lake Isabella, CA | 75 | 95 | - |
| Indian Beach Resort | San Anselmo, CA | 75 | 12 | - |
| Tierra Bonita Mutual Water | Lancaster, CA | 75 | 10 | - |
| Reds Meadow Resort | Mammoth Lakes, CA | 75 | 0 | - |
| MD 58 Sierra Highlands | Madera, CA | 75 | 18 | - |
| Green Gulch Farm | Muir Beach, CA | 75 | 6 | - |
| Csp - Mt Tam East Peak System | Petaluma, CA | 75 | 0 | - |
| Nps Prns - Sky Camp Campground | Point Reyes, CA | 75 | 0 | - |
| Manchester Union Elementary School | Manchester, CA | 75 | 5 | - |
| Eel River Charter School | Covelo, CA | 75 | 2 | - |
| Yokayo Tribe of Indians | Talmage, CA | 75 | 32 | - |
| Apostolic Tabernacle | Merced, CA | 75 | 4 | - |
| Crystal Crag Water & Development Assoc. | Pomona, CA | 75 | 27 | - |
| Woods Lodge | Mammoth Lakes, CA | 75 | 20 | - |
| Manzanita Hills WA | Royal Oaks, CA | 75 | 26 | - |
| Apple Ave WS #02 | Greenfield, CA | 75 | 96 | - |
| Harbor View WA | Salinas, CA | 75 | 60 | - |
| Cathiard Family Estate Winery | St. Helena, CA | 75 | 0 | - |
| Pine Ridge Winery | Napa, CA | 75 | 12 | - |
| Ridge Cafe-Water System | North San Juan, CA | 75 | 4 | - |
| Ananda Retreat Center | Nevada City, CA | 75 | 45 | - |
| Bethel Church | Grass Valley, CA | 75 | 7 | - |
| Gold Hill Mobilehome Park | Roseville, CA | 75 | 30 | - |
| Auburn Ridge Woods | Sacramento, CA | 75 | 13 | - |
| Usfs Middle Meadows Campground | Georgetown, CA | 75 | 2 | - |
| Pnf Peninsula / Wyandotte Cgs | Quincy, CA | 75 | 4 | - |
| Eddo's Harbor & R V Park | Rio Vista, CA | 75 | 20 | - |
| Happy Bar | Sacramento, CA | 75 | 10 | - |
| Oak Glen Steak House | Yucaipa, CA | 75 | 11 | - |
| Potrero General Store | Dulzura, CA | 75 | 30 | - |
| Santa Margarita County Preserve | San Diego, CA | 75 | 3 | - |
| A1 Winstons Mobile Home Park | Stockton, CA | 75 | 16 | - |
| Country Club Vista Mutual Water Co | Woodbridge, CA | 75 | 15 | - |
| Country Manor MHP | Valley Springs, CA | 75 | 12 | - |
| Usasa-Pom Enclave - Camp Roberts | Seaside, CA | 75 | 8 | - |
| Talley Farms Labor Housing | Arroyo Grande, CA | 75 | 2 | - |
| Avila Valley Mutual Water Co | San Luis Obispo, CA | 75 | 34 | - |
| Center of Effort Winery | Arroyo Grande, CA | 75 | 0 | - |
| San Marcos Christian Camp | Santa Barbara, CA | 75 | 14 | - |
| Vista Hills Mutual Water Company | Lompoc, CA | 75 | 25 | - |
| The Hilt Estate | Lompoc, CA | 75 | 2 | - |
| Usfs/Lassen Hat Cr Work Center | Susanville, CA | 75 | 20 | - |
| Siskiyou Forest Products | Anderson, CA | 75 | 0 | - |
| Clear Creek Mobile Park | Redding, CA | 75 | 15 | - |
| Lakeshore RV Park | Antioch, CA | 75 | 18 | - |
| Pg&e - Northshore Campground | Redding, CA | 75 | 3 | - |
| Jolly Giant Flea Market | Anderson, CA | 75 | 4 | - |
| Usfs - Gregory Creek Camp | Redding, CA | 75 | 2 | - |
| Shasta Marina at Packers Bay | Lakehead, CA | 75 | 2 | - |