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 |
| Purina Mills Inc | Turlock, CA | 25 | 11 | - |
| Roberts Ferry Nut Co, Inc (WS) | Waterford, CA | 25 | 10 | - |
| J & J Farm Fresh Produce & Bakery | Hughson, CA | 25 | 4 | - |
| Mountain View Chatom Recreation | Turlock, CA | 25 | 31 | - |
| Resendiz Fruit Barn | Hughson, CA | 25 | 4 | - |
| Oakdale Cheese & Specialties | Oakdale, CA | 25 | 0 | - |
| Country Store Water System | Turlock, CA | 25 | 4 | - |
| Burchell Nursery, Inc | Oakdale, CA | 25 | 0 | - |
| Kiernan/McHenry Water Company, Inc | Long Beach, CA | 25 | 15 | - |
| Oasis Market | Crows Landing, CA | 25 | 30 | - |
| West Coast Sand & Gravel | Modesto, CA | 25 | 9 | - |
| Charity Way Water System | Modesto, CA | 25 | 1 | - |
| Pentecost Properties Water System | Modesto, CA | 25 | 0 | - |
| Modesto Christian Center (Watersystem) | Modesto, CA | 25 | 12 | - |
| Keyes 76 (Water System) | Turlock, CA | 25 | 4 | - |
| Golden Valley Almonds | Denair, CA | 25 | 4 | - |
| Bel Passi Baseball | Modesto, CA | 25 | 13 | - |
| Village Food Mart Water System | Turlock, CA | 25 | 2 | - |
| Los Indios Water System | Modesto, CA | 25 | 2 | - |
| Elks Lodge 1282 | Modesto, CA | 25 | 5 | - |
| Waterford Sportsmen's Club | Modesto, CA | 25 | 16 | - |
| Westley Property LLC | Tracy, CA | 25 | 4 | - |
| Pioneer Equine Hospital Water System | Oakdale, CA | 25 | 9 | - |
| Salida Hulling Association Water System | Salida, CA | 25 | 0 | - |
| Fisher Nut | Modesto, CA | 25 | 3 | - |
| California Transplants LLC | Newman, CA | 25 | 0 | - |
| Cebro Frozen Foods (Eh) | Newman, CA | 25 | 6 | - |
| Mid Valley Ag | Oakdale, CA | 25 | 0 | Clean |
| Growers Direct Nut Company | Hughson, CA | 25 | 12 | - |
| Zansco | Modesto, CA | 25 | 0 | - |
| South San Joaquin Irrigation District | Ripon, CA | 25 | 2 | - |
| Nino's Place Water System | Modesto, CA | 25 | 8 | - |
| Harmony Village | Marysville, CA | 25 | 27 | - |
| Verona Village River Resort | Nicolaus, CA | 25 | 6 | - |
| Ranch House Restaurant & Bar | Yuba City, CA | 25 | 16 | - |
| Oswald Water System | Yuba City, CA | 25 | 9 | - |
| Holt 7518 | Pleasant Grove, CA | 25 | 0 | - |
| Wilcox Oaks Golf Club | Red Bluff, CA | 25 | 3 | - |
| Deer Creek Lodge | Mill Creek, CA | 25 | 3 | - |
| Grace Community Fellowship | Red Bluff, CA | 25 | 3 | - |
| Tehama Co.-Cone Grove Park | Red Bluff, CA | 25 | 4 | - |
| Tehama Co.-River Park | Red Bluff, CA | 25 | 3 | - |
| Tehama Co.-Ridgeway Park | Red Bluff, CA | 25 | 4 | - |
| Tehama Co.-Mill Creek Park | Red Bluff, CA | 25 | 4 | - |
| Village at the Highlands | Penryn, CA | 25 | 0 | - |
| Church of Latter Day Saints | Anderson, CA | 25 | 0 | - |
| Highland Ranch LLC | Penryn, CA | 25 | 0 | - |
| Antoinette Mutual Water Co | Red Bluff, CA | 25 | 7 | - |
| Stony Creek Lodge | Squaw Valley, CA | 25 | 27 | - |
| Western Holiday Lodge | Three Rivers, CA | 25 | 32 | - |