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 |
|---|---|---|---|---|
| Grand Island Mansion | Walnut Grove, CA | 600 | 4 | - |
| St Maria Goretti Parish (Sws) | Elk Grove, CA | 600 | 1 | - |
| Snowcrest Heights Imp Assoc | Mount Baldy, CA | 600 | 6 | - |
| Stagecoach Trails RV Resort | Julian, CA | 600 | 33 | - |
| San Francisco Regional Water System | Burlingame, CA | 600 | 16 | Clean |
| Rodeway Inn | Stockton, CA | 600 | 7 | - |
| San Joaquin River Club Inc | Tracy, CA | 600 | 13 | Clean |
| Mesa Dunes Mobile Home Estates | Arroyo Grande, CA | 600 | 15 | - |
| Caltrans-Grass Lake Rest Stop | Redding, CA | 600 | 1 | - |
| Rancho Sespe Workers Imp Assoc | Ventura, CA | 600 | 16 | - |
| Glass House Camarillo Cultivation, LLC | Camarillo, CA | 600 | 12 | - |
| Madison Elementary School | Fresno, CA | 597 | 13 | - |
| Waterford - Hickman | Waterford, CA | 597 | 4 | - |
| Whiskeytown Nra-Headquarters | Whiskeytown, CA | 594 | 6 | - |
| Dwr-Monument Hill Restrooms | Oroville, CA | 593 | 2 | - |
| S & T Mutual Water Company | Los Osos, CA | 591 | 3 | - |
| Bonita School | Santa Maria, CA | 589 | 10 | - |
| Golden State Water Co - Lucerne | Apple Valley, CA | 586 | 4 | - |
| Csp-Pfeiffer Big Sur | Monterey, CA | 585 | 14 | - |
| Carmel Riviera MWC | Carmel, CA | 584 | 58 | - |
| Stinson Beach County Wtr Dist | Stinson Beach, CA | 583 | 7 | - |
| Costanoa Campground | Pescadero, CA | 583 | 19 | - |
| Roosevelt Elementary School | Fresno, CA | 580 | 17 | - |
| Hmc Group Cold Storage | Kingsburg, CA | 580 | 17 | - |
| Mendocino School District- Mendocino | Mendocino, CA | 579 | 9 | - |
| Echo Valley School WS | Salinas, CA | 579 | 81 | - |
| Mount Laguna Improvement Assn. | Mt Laguna, CA | 578 | 17 | - |
| Seventh Day Adventist Camp | Soquel, CA | 578 | 12 | - |
| Oak Glen Retreat | Yorba Linda, CA | 576 | 6 | - |
| Usfs/Vermillion Campground | Clovis, CA | 575 | 41 | - |
| San Ardo WD | San Ardo, CA | 575 | 27 | - |
| River Pines PUD | River Pines, CA | 574 | 14 | - |
| Bear River Lake Resort | Pioneer, CA | 571 | 22 | - |
| Oak Valley School | Tulare, CA | 570 | 102 | - |
| MD 33 Fairmead | Madera, CA | 568 | 13 | - |
| Planada Elementaryschool | Planada, CA | 567 | 4 | - |
| Banning Hts. Mutual Water Co. | Banning, CA | 567 | 46 | - |
| Glen Eden Sun Club | Corona, CA | 566 | 42 | - |
| Juvenile Justice Campus | Fresno, CA | 565 | 4 | - |
| Lake Forest Mutual W.C. | Susanville, CA | 565 | 22 | - |
| Csp-Bothe-Napa Valley State Park | Napa, CA | 565 | 4 | - |
| Apple Market Two | Thermal, CA | 561 | 37 | - |
| Jacumba Community SD | Jacumba, CA | 561 | 14 | - |
| Dolphin Isle Marina | Fort Bragg, CA | 560 | 12 | - |
| Cosumnes River Elementary School | Sacramento, CA | 560 | 3 | - |
| North Kaweah Mutual Water Company | Three Rivers, CA | 560 | 98 | - |
| Blythe - Mesa Ranch | Blythe, CA | 558 | 16 | - |
| Rancho Seco Park | Sacramento, CA | 558 | 5 | - |
| Central Valley Baptist Church WS | Manteca, CA | 556 | 32 | - |
| Monterey Mushrooms - Maher Crt | Royal Oaks, CA | 554 | 61 | - |