California utilities 1,201 to 1,300.

Each serves 330 to 419 people, as it reports to EPA. Your ZIP code finds yours faster.

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1,201 to 1,300 of 2,762, by people served

California utilities, 1,201 to 1,300 of 2,762, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
Shasta CSA - French Gulch, #11	Redding	419	Not sampled	3
Fcsa 05 - Wildwood Island	Fresno	417	Not sampled	0
Slide Inn Snowbowl Water Co	Sonora	417	Not sampled	0
White Oak Mutual Water Company	Cottonwood	415	Not sampled	0
Californian Mobile Home Park	Rancho Cucamonga	414	Not sampled	0
Delft Colony Water	Visalia	412	Not sampled	0
Hhw&P Moccasin Compound - SFPUC	Burlingame	410	Not sampled	3
Leisure Mobile Home Park	Santa Rosa	410	Not sampled	0
Palo Verde County Water Dist.	Palo Verde	410	Not sampled	3
San Vicente Water Company	Santa Barbara	408	Not sampled	0
Triple R Mutual Water Co	Springville	408	Not sampled	30
Forest Park MWC	Forest Falls	406	Not sampled	1
Sonoma County CSA 41 - Jenner	Santa Rosa	406	Not sampled	11
Mobile Home Estates	Santa Rosa	403	Not sampled	1
Snowcrest Heights Imp Assoc	Mount Baldy	403	Not sampled	0
Teviston Community Services District	Pixley	403	Not sampled	0
Las Cumbres Mutual Water Co	Los Gatos	402	Not sampled	22
Cabana Holiday WS	Irvine	400	Not sampled	0
Clear Creek CSD - Westwood	Westwood	400	Not sampled	0
CSA 51	Desert Center	400	Not sampled	0
Hometown Colonial Estates LLC	Rancho Cordova	400	Not sampled	0
Monterey Bay Academy	La Selva Beach	400	Not sampled	0
Sunset Vista Estates MHP	Lemoore	400	Not sampled	0
Twin Lakes Resort	La Mesa	400	Not sampled	35
Blythe - Hidden Beaches	Blythe	399	Not sampled	0
Butte Creek Estates Mutual Water Co	Chico	399	Not sampled	0
Palm Springs Crest	Desert Hot Springs	399	Not sampled	0
Tahoe City PUD - Madden Creek	Tahoe City	397	Not sampled	0
Winterhaven County Water District	Winterhaven	394	Not sampled	1
San Andreas Mutual Water Co	La Selva Beach	392	Not sampled	0
Del Oro Water Company - Strawberry Div.	Chico	386	Not sampled	2
Valley Estates Poa, Inc.	Weldon	386	Not sampled	1
Forest Springs	Boulder Creek	385	Not sampled	22
South Kaweah Mutual Water Company	Three Rivers	384	Not sampled	13
Occidental Community Services District	Occidental	383	Not sampled	0
Colusa Co. Wwd #2 - Princeton	Princeton	382	Not sampled	0
Strawberry Lodge MWC	Twin Peaks	381	Not sampled	0
Pine Hills Mutual Water Company	Julian	380	Not sampled	2
Western Acres Mutual Water Company	Hanford	380	Not sampled	0
Willow Park Marina	Oakley	380	Not sampled	21
Las Deltas Mutual Water Company	Clovis	375	Not sampled	12
MD 73 Quartz Mountain	Madera	375	Not sampled	0
Sereno del Mar Water Company (Puc)	Forestville	375	Not sampled	0
Bridgeport PUD	Bridgeport	374	Not sampled	12
Anderson Springs CSD	Middletown	373	Not sampled	0
Oak Creek Mobile Home Park	Coarsegold	370	Not sampled	0
Smiley Park Country Club	Running Springs	370	Not sampled	2
Lick Observatory - Ucsc	Mount Hamilton	369	Not sampled	0
Saviers Road Mutual Water Co	Port Hueneme	368	Not sampled	0
Black Rascal Water Company	Merced	367	Not sampled	1
Golden State Water Morongo Delnorte	Apple Valley	366	Not sampled	0
Volta Community SD	Los Banos	366	Not sampled	1
Del Oro Water Co. - Magalia	Chico	363	Not sampled	0
Heights Mutual Water Company	Forestville	363	Not sampled	0
Sisar Mutual Water Co	Santa Paula	363	Not sampled	0
Lake Morena Views MWC	Pasadena	360	Not sampled	21
Naf El Centro	El Centro	360	Not sampled	0
Paradise Ranch MHP	Beverly Hills	360	Not sampled	0
Yuima Municipal Water District	Pauma Valley	360	Not sampled	1
El Dorado ID - Strawberry	Placerville	357	Not sampled	0
Canada Woods WC	Carmel	356	None found	0
Verde Vale Water Company	Anderson	356	Not sampled	0
Fillmore Irrigation Co	Fillmore	353	Not sampled	0
Fisherman'S Retreat	Redlands	352	Not sampled	1
Butterfield Ranch	San Diego	350	Not sampled	4
Davenport County Sanitation	Santa Cruz	350	Not sampled	0
Fcsa 44d - Monte Verdi	Fresno	350	Not sampled	0
Green Acres Mobile Home Estate	Fresno	350	Not sampled	1
Green River Mutual Water Co.	Paso Robles	350	Not sampled	2
MD 37 la Vina	Madera	350	Not sampled	0
MT Baldy Homeowners Assn.	MT. Baldy	350	Not sampled	1
Orwood Resort	Brentwood	350	Not sampled	1
Sac City Mobile Home Community Lp	Sacramento	350	Not sampled	0
Sunset West Community LLC	Seaside	350	Not sampled	0
Tres Pinos CWD	Tres Pinos	350	Not sampled	0
Wildewood East Mutual	Yuba City	350	Not sampled	0
Yettem Water System	Visalia	350	Not sampled	1
Cal Am - Raymond	Sacramento	347	Not sampled	37
Del Oro Water Co - Benbow	Chico	347	Not sampled	0
Chemeketa Park Mutual Water Company	Santa Clara	346	Not sampled	3
El Portal Mobile Estates	Santa Rosa	344	Not sampled	4
Santa Ysabel Ranch MWC	San Luis Obispo	344	Not sampled	0
Colonial Park	Healdsburg	342	Not sampled	0
Arbor Mobile Home Park WS	Irvine	340	Not sampled	0
Leisure Pines Mutual Water Co	Twain Harte	340	Not sampled	1
Ponderosa CSD	Springville	340	Not sampled	0
Sharondale Mesa HOA	Calimesa	340	Not sampled	0
Tooleville Mutual Non Profit Water Assn	Exeter	340	Not sampled	1
Porterville - Jones Corner	Porterville	339	None found	1
Sunrise Village MHP	Scottsdale	339	Not sampled	1
Aldercroft Heights County Water District	Los Gatos	338	Not sampled	0
Muir Beach Community	Muir Beach	336	Not sampled	0
Plumas Eureka CSD	Blairsden	334	Not sampled	3
Delta Mutual Water Company	Oakley	333	Not sampled	20
Folsom Lake Mutual Water Co	Granite Bay	333	Not sampled	0
Riverside CSD	Ferndale	333	Not sampled	0
Shasta CSA - Castella, #3	Redding	333	Not sampled	2
Del Dios Mutual Water Company	Escondido	330	Not sampled	1
Myers Flat M.W.S. Inc.	Myers Flat	330	Not sampled	1
Sierra Moon Mutual Water Company	Chico	330	Not sampled	1

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.

1,201 to 1,300 of 2,762, by people served

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