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 |
| Betteravia Gas & Mart | Santa Maria, CA | 150 | 14 | - |
| Cambria Winery | Santa Maria, CA | 150 | 0 | - |
| Flag Is Up Farms | Solvang, CA | 150 | 0 | - |
| Hidden Falls Girl Scout Camp | Alameda, CA | 150 | 20 | - |
| Midland School | Los Olivos, CA | 150 | 26 | - |
| Anderson Tucker Oaks Golf | Redding, CA | 150 | 12 | - |
| Usfs - Sims Campground | Mount Shasta, CA | 150 | 0 | - |
| United Parcel Svc - Anderson | West Sacramento, CA | 150 | 14 | - |
| Mountain Meadows Camp | Shingletown, CA | 150 | 5 | - |
| Pneuma Retreat Center - Stewart Mineral | Weed, CA | 150 | 32 | - |
| Monte Shasta M.W.C. | Mt. Shasta, CA | 150 | 6 | - |
| Doctor's Park Owners Association | Mt. Shasta, CA | 150 | 3 | - |
| Hines Nurseries Winters North | Winters, CA | 150 | 3 | - |
| Mission Highlands Mutual Water Co. | Sonoma, CA | 150 | 16 | - |
| Riebli Mutual Water Company | Fulton, CA | 150 | 13 | - |
| Austin Creek Mutual (Springhill) | Cazadero, CA | 150 | 13 | - |
| Calpine (Geysers Administration Center) | Middletown, CA | 150 | 6 | - |
| Camp Liahona Redwoods | Lakeport, CA | 150 | 12 | - |
| Nicholson Ranch Winery | Sonoma, CA | 150 | 9 | - |
| Hop Kiln Winery | Paso Robles, CA | 150 | 2 | - |
| Macrostie Winery and Vineyard | Healdsburg, CA | 150 | 0 | - |
| Oid #22 - Williams Tract | Oakdale, CA | 150 | 7 | - |
| Buehner Water System | Tracy, CA | 150 | 35 | - |
| Pasquini's (Micheli) WS | Live Oak, CA | 150 | 11 | - |
| Reynolds Consumer Products (Red Bluff) | Reb Bluff, CA | 150 | 6 | - |
| Lassen Vnp - Lost Creek | Mineral, CA | 150 | 0 | - |
| Gateway Restaurant & Lodge | Three Rivers, CA | 150 | 26 | - |
| Rmrc-Fir & Cove Group Campgrounds | Overland Park, CA | 150 | 8 | - |
| Rm Pyles Boys Camp | Valencia, CA | 150 | 2 | - |
| Comfort Inn & Suites | Three Rivers, CA | 150 | 35 | - |
| Fairway Mutual Water Co | Kingsburg, CA | 150 | 39 | - |
| Booth Ranches LLC | Orange Cove, CA | 150 | 68 | - |
| Yosemite Nps-Glen Aulin | Yosemite Np, CA | 150 | 2 | - |
| Cal Fire Baseline Conservation Camp | Jamestown, CA | 150 | 43 | - |
| Elkins Ranch | Fillmore, CA | 150 | 24 | - |
| Mariani Nut Company - Buckeye RD | Winters, CA | 150 | 10 | - |
| Nelson's Grove | Sacramento, CA | 150 | 6 | - |
| Mjusd Loma Rica School | Marysville, CA | 150 | 8 | - |
| Caltrans - Mountain Pass Jpoe Cvef | San Bernardino, CA | 149 | 12 | - |
| Fairway Estates PWS CSA-18 | Stockton, CA | 149 | 9 | - |
| Dixon 76 | Vacaville, CA | 149 | 17 | - |
| Cody Water Association | Rocklin, CA | 148 | 6 | - |
| Hart Creek Estates Mutual Water Co. | Bakersfield, CA | 148 | 14 | - |
| MD 06 Lake Shore Park | Madera, CA | 148 | 242 | - |
| Nickel & Nickel Winery | St. Helena, CA | 148 | 8 | - |
| Currier Estates Water Corp | Tracy, CA | 148 | 17 | - |
| Roseview Heights Mutual Water Company | San Jose, CA | 148 | 34 | - |
| George Ranch Mutual Water Company | Hercules, CA | 148 | 10 | - |
| Mulberry MHP | Stockton, CA | 148 | 12 | - |
| Paradise Canyon Improvement Association | Santa Barbara, CA | 147 | 6 | - |