California utilities 2,701 to 2,762.
Each serves 1 to 25 people, as it reports to EPA. Your ZIP code finds yours faster.
2,701 to 2,762 of 2,762, by people served
| Utility | Based in | Serves | Regulated PFAS | Health-based violations since 2016 |
|---|---|---|---|---|
| Big Springs Mutual Water System | Old Station | 25 | Not sampled | 1 |
| Blue Mountain Center | Tomales | 25 | Not sampled | 0 |
| Bonfire Village Hotel | Sacramento | 25 | Not sampled | 18 |
| Bradley - Lockwood Rd WS | Lockwood | 25 | Not sampled | 0 |
| Buehner Houses | Tracy | 25 | Not sampled | 0 |
| Camp Loma Mar | Oakland | 25 | Not sampled | 1 |
| Collinsville Water Works | Birds Landing | 25 | Not sampled | 1 |
| Covington Mill - A | Redding | 25 | Not sampled | 0 |
| Cresta Mesa Parque | Fairfield | 25 | Not sampled | 0 |
| Darwin Community Service District | Darwin | 25 | Not sampled | 3 |
| Falling Rock Rv Park | Oroville | 25 | Not sampled | 0 |
| Frccsd Hot Springs | Twain | 25 | Not sampled | 1 |
| Harmony Village | Marysville | 25 | Not sampled | 2 |
| Helm School | Helm | 25 | Not sampled | 1 |
| Hometown Water Association | Ridgecrest | 25 | Not sampled | 0 |
| Honey Lake Campground | Milford | 25 | Not sampled | 0 |
| Jackson Hide - A - Way | Ocotillo | 25 | Not sampled | 0 |
| Monte Vista Christian School | Watsonville | 25 | Not sampled | 0 |
| Murrieta/Hernandez Farms | Kerman | 25 | Not sampled | 1 |
| NPS - Death Valley, Stovepipe Wells | Death Valley | 25 | Not sampled | 0 |
| R - Ranch in the Sequoias | Kernville | 25 | Not sampled | 21 |
| Rincon Water & Road Works | Ventura | 25 | Not sampled | 6 |
| Riverfront Mutual Water Company | Alpine | 25 | Not sampled | 0 |
| Rolling Oaks Road Association | Rohnert Park | 25 | Not sampled | 0 |
| Royal Carrizo HOA | Palm Desert | 25 | Not sampled | 0 |
| Santa Ynez Roblar Mobile Home Park | La Canada | 25 | Not sampled | 0 |
| Shaver Lake Heights Water Assn | Prather | 25 | Not sampled | 0 |
| Tract 1199 Water System | Selma | 25 | Not sampled | 1 |
| Vailima Estates Mutual Water | St. Helena | 25 | Not sampled | 0 |
| Valhalla Water Association | Tujunga | 25 | Not sampled | 0 |
| Van Loon Water Association | Bishop | 25 | Not sampled | 0 |
| Waters Road Domestic Users Group | Moorpark | 25 | Not sampled | 0 |
| Whispering Pines Mobile Home Park | Yuba City | 25 | Not sampled | 0 |
| Windflower Point Mutual Water Company | Clearlake | 25 | Not sampled | 0 |
| Yulica | Nevada City | 25 | Not sampled | 1 |
| Forest Ranch Mobile Park | Oakley | 24 | Not sampled | 0 |
| Snug Harbor Rv Lp | Walnut Grove | 24 | Not sampled | 12 |
| Mhc Tt Inc. (Dba Pio Pico) | Tampa | 23 | Not sampled | 0 |
| MWD of So Cal Iron Mountain | La Verne | 23 | Not sampled | 0 |
| Shady Oaks Mobile Home Park LLC | Fresno | 23 | Not sampled | 17 |
| Alta Sierra Mutual Water Co. | Wofford Heights | 22 | Not sampled | 0 |
| Harris Feeding Company | Coalinga | 22 | Not sampled | 9 |
| Meadow Lake Apartments | Fillmore | 22 | Not sampled | 1 |
| Sierra Village Mobile Home Park | MI Wuk Village | 21 | Not sampled | 1 |
| Big Lagoon Park Water Co. | Eureka | 20 | Not sampled | 0 |
| Harris Farms/Horse Barn | Coalinga | 20 | Not sampled | 5 |
| Palomar Observatory | Palomar Mountain | 20 | Not sampled | 0 |
| Plantation Mobile Home Park | Sacramento | 20 | Not sampled | 0 |
| R Ranch at the Lake | Napa | 20 | Not sampled | 1 |
| Robinson'S Corner MHP | Long Beach | 20 | Not sampled | 2 |
| Segura'S Rv Park LLC | Newcastle | 20 | Not sampled | 0 |
| Thousand Trails San Benito Preserve | Paicines | 17 | None found | 3 |
| MWD - Eagle Mountain | La Verne | 15 | Not sampled | 0 |
| Thousand Trails - Morgan Hill | Morgan Hill | 13 | Not sampled | 0 |
| Fourth Street Water System | Lake Isabella | 12 | Not sampled | 3 |
| Barton Flats Water System | Angelus Oaks | 11 | Not sampled | 5 |
| Los Angeles, City of - Power Plant #1 | Saugus | 10 | Not sampled | 0 |
| North Shore MWC | Fawnskin | 7 | Not sampled | 13 |
| Indian Oaks Trailer Park | Murrieta | 5 | Not sampled | 21 |
| Travis AFB WTP - Vallejo | Vallejo | 3 | Not sampled | 0 |
| Randall - Bold Water Treatment Plant | Concord | 1 | Not sampled | 0 |
| SFPUC - Pleasanton Wells | Burlingame | 1 | 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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