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 |
|---|---|---|---|---|
| Tesoro Viejo Master MWC, Inc. | San Jose, CA | 3,885 | 0 | - |
| Treasure Island | Burlingame, CA | 3,864 | 6 | - |
| Woodlands Development | Arroyo Grande, CA | 3,862 | 3 | - |
| Cdcr-High Desert State Prison | Susanville, CA | 3,857 | 20 | Clean |
| Angels, City Of | Angels Camp, CA | 3,836 | 25 | Clean |
| Gilbert Street Complex | San Bernardino, CA | 3,833 | 4 | - |
| So. Cal. Edison Co.-Santa Catalina | Avalon, CA | 3,822 | 5 | Detected |
| Bishop, City Of | Bishop, CA | 3,819 | 13 | Clean |
| San Joaquin County-Mokelumne Acres | Stockton, CA | 3,802 | 0 | Detected |
| Willow County Water District | Ukiah, CA | 3,797 | 7 | Clean |
| Forestville Water District | Forestville, CA | 3,788 | 2 | - |
| American Valley Csd | Quincy, CA | 3,778 | 15 | Detected |
| Idyllwild Water District | Idyllwild, CA | 3,762 | 12 | - |
| Hunter Hill Safety Roadside Rest Area | Fairfield, CA | 3,707 | 10 | - |
| Cal Am - Oakhurst | Sacramento, CA | 3,693 | 231 | Clean |
| Mt. Shasta, City Of | Mt. Shasta, CA | 3,642 | 36 | Clean |
| Brooktrails Township Csd | Willits, CA | 3,632 | 7 | Clean |
| Grosso Kresser Winery | Los Angeles, CA | 3,606 | 0 | - |
| Mission Hills Csd | Lompoc, CA | 3,600 | 6 | Clean |
| Esparto C.s.d. | Esparto, CA | 3,574 | 13 | - |
| Lockeford Community Serv. Dist. | Lockeford, CA | 3,572 | 20 | - |
| Cdcr - Sierra Conservation Center | Jamestown, CA | 3,571 | 30 | - |
| Bandy Canyon Ranch Corp | Escondido, CA | 3,564 | 0 | - |
| Hope Valley Cg | Sparks, CA | 3,560 | 2 | - |
| Jackson Valley Irrigation District | Ione, CA | 3,553 | 66 | Clean |
| Cobb Area County Water District | Cobb, CA | 3,515 | 12 | - |
| Csp-Salt Point State Park | Mendocino, CA | 3,513 | 1 | - |
| Csp-Fort Ross State Park | Mendocino, CA | 3,501 | 17 | - |
| Bear Valley Mountain Resort | Bear Valley, CA | 3,500 | 0 | - |
| Yosemite Nps-Mariposa Grove | Yosemite Np, CA | 3,500 | 0 | - |
| Shady Cove | Fawnskin, CA | 3,500 | 0 | - |
| Presidio of San Francisco | San Francisco, CA | 3,500 | 14 | Detected |
| Caltrans-Lakehead Srra | Redding, CA | 3,500 | 10 | - |
| Mt. Shasta Ski Park | Mt. Shasta, CA | 3,500 | 2 | - |
| East Orange County WD - Rz | Orange, CA | 3,464 | 3 | - |
| Borrego WD | Borrego Springs, CA | 3,429 | 12 | Clean |
| City of Brisbane | Brisbane, CA | 3,402 | 17 | - |
| Groveland Community Serv Dist | Groveland, CA | 3,400 | 18 | Detected |
| Box Springs Mutual WC | Moreno Valley, CA | 3,382 | 16 | - |
| Tahoe City PUD - Tahoe Swiss Village | Tahoe City, CA | 3,363 | 12 | - |
| Rio Alto Water District | Cottonwood, CA | 3,329 | 8 | - |
| Folsom, City of - Ashland | Folsom, CA | 3,317 | 0 | Clean |
| Cottonwood Water District | Cottonwood, CA | 3,316 | 9 | Clean |
| San Benito High School | Hollister, CA | 3,310 | 18 | Clean |
| South Shore Recreation Area | South Lake Tahoe, CA | 3,300 | 50 | Clean |
| Rio Dell, City Of | Rio Dell, CA | 3,300 | 6 | Clean |
| Gibson Ranch County Park | Sacramento, CA | 3,300 | 6 | - |
| Lukins Brothers Water Company | South Lake Tahoe, CA | 3,277 | 8 | - |
| Rincon del Diablo MWD (ID-A) | Escondido, CA | 3,275 | 2 | - |
| Lake Don Pedro Csd | La Grange, CA | 3,240 | 58 | - |