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 |
| Redding Travel Center | Westlake, CA | 120 | 7 | - |
| Amberwood Estates, LLC | Stockton, CA | 120 | 15 | - |
| Pedrick Produce | Dixon, CA | 120 | 11 | - |
| Traditional Medicinals, Inc. | Sebastopol, CA | 120 | 13 | - |
| Fisherman's Bend MHP | Gustine, CA | 120 | 14 | - |
| Kiernan Business Center | Modesto, CA | 120 | 8 | - |
| Nuestro School | Live Oak, CA | 120 | 39 | - |
| Cal Fire-Trinity River Conservation Camp | Lewiston, CA | 120 | 6 | - |
| Ventura Coastal, LLC - Visalia Division | Tipton, CA | 120 | 28 | - |
| Jireh Packing Company-Orange Cove | Orange Cove, CA | 120 | 164 | - |
| Foxfield Riding School | Westlake Village, CA | 120 | 0 | - |
| Road Trip Bar & Grill | Capay, CA | 120 | 17 | - |
| Forest Ranch Mutual Water System | Forest Ranch, CA | 119 | 32 | - |
| Kings Canyon High School | Reedley, CA | 119 | 30 | - |
| Dune 3 Mutual Water Company, LLC | Morro Bay, CA | 119 | 21 | - |
| Big Sur Bazaar WS | Big Sur, CA | 119 | 35 | - |
| Lewis Cellars | Napa, CA | 119 | 15 | - |
| Page Avenue Mutual Water Company | Fullerton, CA | 119 | 24 | - |
| San Antonio Canyon Msc | Mt. Baldy, CA | 119 | 5 | - |
| Spring Creek Estates PWS | Stockton, CA | 119 | 10 | - |
| City of Modesto - Central Turlock | Modesto, CA | 119 | 6 | - |
| Menf-Letts Lake Cg | Willows, CA | 118 | 5 | - |
| Buhach Preschool (Kindercare) | Atwater, CA | 118 | 36 | - |
| St Francis Tract Water System | Freedom, CA | 118 | 20 | - |
| The Fruit Yard Restaurant | Modesto, CA | 118 | 9 | - |
| Redcrest Water Works | Whitethorn, CA | 116 | 153 | - |
| Usfs-Monte Cristo Camp T-4 | Arcadia, CA | 116 | 9 | - |
| Isot Community Water System | Canby, CA | 116 | 2 | - |
| Hidden Canyon Ranch MWC | Salinas, CA | 116 | 28 | - |
| Airport Planet Water | Redding, CA | 116 | 11 | - |
| Hessel Church | Sebastopol, CA | 116 | 7 | - |
| Del Oro WC - Larkspur Meadows | Chico, CA | 116 | 11 | - |
| Black Chasm Cavern | Angels Camp, CA | 115 | 13 | - |
| Ebrpd Alhambra | Oakland, CA | 115 | 0 | - |
| Gerle Creek Summer Homes | Sacramento, CA | 115 | 12 | - |
| Fcsa 14 - Belmont Manor | Fresno, CA | 115 | 5 | - |
| H and R Facilities | Sanger, CA | 115 | 2 | - |
| Crystal Geyser Bottling Plant | Olancha, CA | 115 | 32 | - |
| Tehachapi Cement LLC | Tehachapi, CA | 115 | 63 | - |
| Coarsegold Market | Coarsegold, CA | 115 | 13 | - |
| Select Harvest USA, LLC | Turlock, CA | 115 | 0 | - |
| Hunewill Guest Ranch | Bridgeport, CA | 115 | 24 | - |
| Anza Petroleum Inc | Carlsbad, CA | 115 | 12 | - |
| Jahant Woods Cellars | Acampo, CA | 115 | 0 | - |
| Bobcat Springs Mutual Water Company | Buellton, CA | 115 | 2 | - |
| Downtown Graton Mutual Water System | Graton, CA | 115 | 6 | - |
| Burnt Ranch Estates | Burnt Ranch, CA | 115 | 11 | - |
| Sierra View JR Academy | Exeter, CA | 115 | 91 | - |
| 49Er Trailer Ranch | Columbia, CA | 115 | 8 | - |
| Silverfork Mutual Water | Napa, CA | 114 | 28 | - |