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 |
|---|---|---|---|---|
| Riley's Farm | Redlands, CA | 2,400 | 6 | - |
| Terrace Water Company | Colton, CA | 2,400 | 18 | - |
| Twain Harte Community Services District | Twain Harte, CA | 2,378 | 5 | - |
| Lost Hills Utility District | Lost Hills, CA | 2,370 | 53 | - |
| Clearlake Oaks County Water District | Clearlake Oak, CA | 2,359 | 21 | - |
| San Juan Bautista, City Of | San Juan Bautista, CA | 2,335 | 21 | - |
| Little Bear Water Company | Soledad, CA | 2,327 | 18 | - |
| Trinity Co. W.w. Dist #1 | Hayfork, CA | 2,324 | 11 | - |
| Clawa | Crestline, CA | 2,320 | 1 | - |
| Eisenhower Medical Center(water) | Ranhco Mirage, CA | 2,300 | 51 | - |
| Mountain Gate C.s.d. | Redding, CA | 2,227 | 32 | - |
| Selma High School | Selma, CA | 2,225 | 29 | - |
| Santa Nella County Water District | Santa Nella, CA | 2,211 | 41 | - |
| Jedediah Smith State Park | Crescent City, CA | 2,208 | 0 | - |
| Bullard's Bar Rec Fac Wtr Sys | Dobbins, CA | 2,208 | 24 | - |
| Tejon Ranch Grapevine Water | Lebec, CA | 2,207 | 23 | - |
| Westmorland, City Of | Westmorland, CA | 2,202 | 60 | - |
| Mil Potrero MWC | Pine Mountain Club, CA | 2,200 | 28 | - |
| Alpine Springs County Water District | Alpine Meadows, CA | 2,200 | 3 | - |
| Cal Trans - C.v. Kane | San Bernardino, CA | 2,200 | 15 | - |
| Poplar Comm Service Dist | Poplar, CA | 2,200 | 24 | - |
| Chester Public U.d. | Chester, CA | 2,187 | 13 | - |
| Central Ca Womens Facility | Chowchilla, CA | 2,183 | 0 | - |
| Morro Rock Mutual Water Co | Cayucos, CA | 2,181 | 1 | - |
| Nacimiento Water Company | Bradley, CA | 2,181 | 103 | - |
| Whiskeytown Nra-Brandy Creek | Whiskeytown, CA | 2,164 | 2 | - |
| MI Wuk Village Mut Wtr Co | MI Wuk Village, CA | 2,163 | 11 | - |
| London Community Serv Dist | Dinuba, CA | 2,134 | 30 | - |
| Lucerne Water Co. - Cal Water Service | San Jose, CA | 2,129 | 10 | Clean |
| Herlong Public Utility District | Herlong, CA | 2,114 | 2 | - |
| Interstate 5 Utility Company | Bakersfield, CA | 2,100 | 35 | - |
| Tom Pistachio Water System | Fresno, CA | 2,100 | 4 | - |
| City of Portola | Portola, CA | 2,100 | 44 | - |
| Thunderbird Cwd | Apple Valley, CA | 2,098 | 24 | - |
| Boron Csd | Boron, CA | 2,086 | 116 | - |
| Golden State Water Co - Apple Vly North | Apple Valley, CA | 2,086 | 0 | - |
| Cwsc las Lomas | San Jose, CA | 2,084 | 5 | Clean |
| Crestview Mutual Water Co | Camarillo, CA | 2,079 | 7 | - |
| City of Biggs | Biggs, CA | 2,060 | 25 | - |
| Garberville Sanitary District | Garberville, CA | 2,041 | 4 | - |
| Cal American WC - las Posas Estates | Rosemead, CA | 2,039 | 0 | - |
| Golden State Water Company-Cypress Ridge | Rancho Cordova, CA | 2,026 | 48 | - |
| Cabazon Water District | Cabazon, CA | 2,010 | 59 | - |
| Buttonwillow Tiger Mart | Buttonwillow, CA | 2,006 | 0 | - |
| Shasta CSA - Jones Valley, #6 | Redding, CA | 2,006 | 11 | - |
| Csp-Van Damme State Park | Duncans Mills, CA | 2,004 | 7 | - |
| Lake County CSA 20 - Soda Bay | Lakeport, CA | 2,003 | 1 | - |
| Cal American Water Company - Piru | Rosemead, CA | 2,003 | 6 | - |
| Pyramid Creek Trailhead | Hollister, CA | 2,000 | 19 | - |
| Lee's Frontier | Victorville, CA | 2,000 | 0 | - |