California utilities 2,101 to 2,200.
Each serves 70 to 80 people, as it reports to EPA. Your ZIP code finds yours faster.
2,101 to 2,200 of 2,762, by people served
| Utility | Based in | Serves | Regulated PFAS | Health-based violations since 2016 |
|---|---|---|---|---|
| Portola Improvement Association MWC | La Honda | 80 | Not sampled | 0 |
| Sacramento River Rv Park | Eugene | 80 | Not sampled | 0 |
| Sobre Vista Water Company | El Verano | 80 | Not sampled | 0 |
| Uplands of the Kern Mutual Water Company | Bakersfield | 80 | Not sampled | 1 |
| Yosemite Vista Estates | Groveland | 80 | Not sampled | 0 |
| Clio Public Utility District | Clio | 79 | Not sampled | 1 |
| Hills Ranch Mutual Water Company | Mendocino | 79 | Not sampled | 0 |
| Owens Peak West | Inyokern | 79 | Not sampled | 0 |
| Terra Linda Farms | Riverdale | 79 | Not sampled | 6 |
| Vista Grande Water Users Association | Los Gatos | 79 | Not sampled | 0 |
| Big Rise Village | Granite Bay | 78 | Not sampled | 1 |
| Blackie Rd WS #05 | Salinas | 78 | Not sampled | 1 |
| Rambling Hills Estates | Guerneville | 78 | Not sampled | 0 |
| Shorelands Road & Water Company | Mendocino | 78 | Not sampled | 0 |
| Strawberry Rd WS #06 | Watsonville | 78 | Not sampled | 1 |
| Bodega Water Company | Bodega | 77 | Not sampled | 1 |
| Mountain Center Cafe | Idyllwild | 77 | Not sampled | 0 |
| Britz/Five Points | Fresno | 76 | Not sampled | 0 |
| Madrone Mutual Water Company | Cotati | 76 | Not sampled | 0 |
| Oroville Mobile Home Park | Sacramento | 76 | Not sampled | 0 |
| Reesedale Mutual Water Company | Lancaster | 76 | Not sampled | 0 |
| A1 Winstons Mobile Home Park | Stockton | 75 | Not sampled | 2 |
| Apple Ave WS #02 | Greenfield | 75 | Not sampled | 1 |
| Auburn Ridge Woods | Sacramento | 75 | Not sampled | 0 |
| Avila Valley Mutual Water Co | San Luis Obispo | 75 | Not sampled | 0 |
| Bradford Run Rv | Aguanga | 75 | Not sampled | 0 |
| Breese Subdivision 2 | Red Bluff | 75 | Not sampled | 1 |
| Briceland C.S.D. | Garberville | 75 | Not sampled | 0 |
| Butte City Community S.D. | Butte City | 75 | Not sampled | 1 |
| Camden Trailer Park | Fresno | 75 | Not sampled | 0 |
| Candlelight Village Mutual Water Co. | Somerset | 75 | Not sampled | 0 |
| Cathedral Hills MWC, Inc | Aptos | 75 | Not sampled | 0 |
| Clear Creek Mobile Park | Redding | 75 | Not sampled | 0 |
| Corinthian Bay Mutual Water Company | Lakeport | 75 | Not sampled | 0 |
| Country Club Vista Mutual Water Co | Woodbridge | 75 | Not sampled | 0 |
| Country Manor MHP | Valley Springs | 75 | Not sampled | 0 |
| Friendly Acres MHP | Sacramento | 75 | Not sampled | 1 |
| Gold Hill Mobilehome Park | Roseville | 75 | Not sampled | 0 |
| Golden Oaks Mobile Home Park | Sacramento | 75 | Not sampled | 0 |
| Green Gulch Farm | Muir Beach | 75 | Not sampled | 1 |
| Harbor View WA | Salinas | 75 | Not sampled | 1 |
| Harris Farms South 101 - 144 | Coalinga | 75 | Not sampled | 5 |
| Howell'S Lakeside Water Co. | Red Bluff | 75 | Not sampled | 1 |
| Keough'S Hot Springs | Bishop | 75 | Not sampled | 0 |
| Kernvale Mutual Water Co | Lake Isabella | 75 | Not sampled | 0 |
| Manzanita Hills WA | Royal Oaks | 75 | Not sampled | 0 |
| Marina Mobile Manor | Fremont | 75 | Not sampled | 0 |
| MD 58 Sierra Highlands | Madera | 75 | Not sampled | 0 |
| NPS Ggnra | Sausalito | 75 | None found | 0 |
| Oaklane Mobile Village, LLC. | Roseville | 75 | Not sampled | 0 |
| Oasis Investments | Turlock | 75 | Not sampled | 0 |
| Park Royal Mutual Water Company | Santa Rosa | 75 | Not sampled | 2 |
| Pine Tree Lane Mutual Water Co | Aptos | 75 | Not sampled | 0 |
| Tierra Bonita Mutual Water | Lancaster | 75 | Not sampled | 0 |
| Vista Hills Mutual Water Company | Lompoc | 75 | Not sampled | 1 |
| Waddington W.W. | Ferndale | 75 | Not sampled | 0 |
| Wilson Acres Mutual Water | Red Bluff | 75 | Not sampled | 0 |
| Yokayo Tribe of Indians | Talmage | 75 | Not sampled | 1 |
| Pike Ranch Mutual Water Co | Oakhurst | 74 | Not sampled | 7 |
| Bautista Cc No. 36 | Hemet | 73 | Not sampled | 0 |
| Countryside Estates MWC | Salinas | 73 | Not sampled | 1 |
| Glenn Ave WS #01 | Salinas | 73 | Not sampled | 1 |
| Kern Mobile Estates LLC | Los Angeles | 73 | Not sampled | 39 |
| Knightsen Community Water System | Oakley | 73 | Not sampled | 0 |
| Lazy S Mobile Ranch | Middletown | 73 | Not sampled | 15 |
| Primrose Lane Apartments | Camarillo | 73 | Not sampled | 0 |
| South Feather W&P - Bangor | Oroville | 73 | Not sampled | 0 |
| Thermal Park | Indio | 73 | Not sampled | 1 |
| Town & Country Water Company | Bakersfield | 73 | Not sampled | 0 |
| Tico Mutual Water Co | Ojai | 72 | Not sampled | 0 |
| Upper Little Bear Mountain Club | Blue Jay | 72 | Not sampled | 0 |
| The Village Mobile Home Park | Valencia | 71 | Not sampled | 33 |
| Arroyo Seco Estates Mws | Soledad | 70 | Not sampled | 1 |
| Baycliff Water | Lower Lake | 70 | Not sampled | 0 |
| Brush and Old Well Mutual Water Company | Los Gatos | 70 | Not sampled | 1 |
| Callahan Water District | Callahan | 70 | Not sampled | 1 |
| Creekside Mobilehome Park | Sacramento | 70 | Not sampled | 1 |
| Deer Meadow Mutual Water Company | Three Rivers | 70 | Not sampled | 1 |
| Golden Valley Municipal Water District | Gorman | 70 | Not sampled | 0 |
| H2o, Inc | Arroyo Grande | 70 | Not sampled | 0 |
| Hidden Harbor Marina & Rvp | Fremont | 70 | Not sampled | 1 |
| Las Colinas Road & Water Assn | Santa Maria | 70 | Not sampled | 0 |
| Little Valley CSD | Little Valley | 70 | Not sampled | 1 |
| Los Carneros Mwa | Aromas | 70 | Not sampled | 0 |
| Napa River Ranch | Napa | 70 | Not sampled | 2 |
| New Horizons Mobile/Rv Park | Redmond | 70 | Not sampled | 0 |
| New Meadows | Palos Verdes Estates | 70 | Not sampled | 1 |
| North Lone Pine Mutual Water Company | Lone Pine | 70 | Not sampled | 0 |
| Post Ranch Inn WS | Big Sur | 70 | Not sampled | 0 |
| Reeds Creek Estates | Red Bluff | 70 | Not sampled | 0 |
| Rivernook Campground | Kernville | 70 | Not sampled | 0 |
| Sierra Pines Mobile Home Park | South Lake Tahoe | 70 | Not sampled | 1 |
| Valley Mobile Home Park | Calexico | 70 | Not sampled | 1 |
| Valley Vista Mutual Water Company | Bishop | 70 | Not sampled | 0 |
| Washington Ridge C.C. | Nevada City | 70 | Not sampled | 0 |
| Wayside Motel Apartments WTR Sys | Stockton | 70 | Not sampled | 0 |
| West Valley Mutual Water Company | Inyokern | 70 | Not sampled | 0 |
| Westley CSD | Crows Landing | 70 | Not sampled | 1 |
| Westport County Water District | Westport | 70 | Not sampled | 0 |
| Wilshire Heights Mutual Water Company | Santa Rosa | 70 | Not sampled | 0 |
Every utility EPA sampled for PFAS under UCMR 5, any other community system serving 3,300 people or more, and any smaller one with results from 2020 on, from the state. Other systems appear in ZIP code results. People served is what each utility reports to EPA. Data: EPA SDWIS 2026 Q3, UCMR 5 and EPA’s 2012 to 2019 compliance results, and California State Water Resources Control Board, Division of Drinking Water.
Where to go next
- Read your utility’s own reportIt covers contaminants these pages don’t show, and its own latest results.How to read it
- Every contaminantLegal limits, health goals and what handles each one.All contaminants
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