California utilities 1,101 to 1,200.

Each serves 420 to 535 people, as it reports to EPA. Your ZIP code finds yours faster.

Find a California utility, city or county

1,101 to 1,200 of 2,762, by people served

California utilities, 1,101 to 1,200 of 2,762, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
Gabilan WC	Salinas	535	Not sampled	0
Sid - Gibson Canyon	Vacaville	535	Not sampled	1
CSA 42 Oro Grande	San Bernardino	533	Not sampled	0
Allensworth CSD	Earlimart	531	Not sampled	6
Palms River Resort	Needles	531	Not sampled	0
Willowside Mutual Water Company	Santa Rosa	528	Not sampled	0
Cazadero Water Company, Inc. (Puc)	Forestville	525	Not sampled	6
Mountain Meadows MWC	Mammoth Lakes	525	Not sampled	0
Castlewood Domestic Water System	Pleasanton	524	Not sampled	1
North Tahoe PUD - Carnelian Woods	Tahoe Vista	524	Not sampled	0
Santa Lucia Preserve WS	Carmel	524	Not sampled	0
Psmcsd - Moss Landing Harbor WS	Royal Oaks	520	Not sampled	0
West Palm Springs Village	Desert Hot Springs	517	Not sampled	0
Big Rock C.S.D.	Crescent City	513	Not sampled	0
Colusa Co. Wwd #1 - Grimes	Grimes	512	Not sampled	36
Del Oro Water Co. - Stirling Bluffs	Chico	512	Not sampled	0
North Tahoe PUD - Dollar Cove	Tahoe Vista	507	Not sampled	0
Krista Mutual Water Company	Frazier Park	504	Not sampled	0
Campo Hills - County Public Works Wastewtr	Spring Valley	500	Not sampled	0
Circle Oaks Water District	Napa	500	Not sampled	0
Coyote Valley Rv Resort	Los Gatos	500	Not sampled	1
Crows Landing Comm Svc District	Crows Landing	500	Not sampled	1
Golden Era Productions	San Jacinto	500	Not sampled	0
Knoll Enterprises	Ludlow	500	Not sampled	79
Lake Almanor Country Club MWC	Lake Almanor	500	None found	1
Lake Isabella Community Services Dist	Shafter	500	Not sampled	0
Lsid - Strathmore System	Lindsay	500	Not sampled	1
Lsid - Tonyville	Lindsay	500	Not sampled	20
Starlite Pines Mutual Water Co Inc	Shingletown	500	Not sampled	0
Tract 92 Community Services District	Farmersville	500	Not sampled	0
Hidden Valley Community Association	Granite Bay	499	Not sampled	0
Lakeview Hills Community Assoc	Folsom	499	Not sampled	0
Valley View Park MWC	Crestline	499	Not sampled	1
Broadview Terrace Mutual Water Company	Oakhurst	498	Not sampled	1
The Lakes Association	Visalia	495	Not sampled	0
Westside Park Mutual Water	Palmdale	495	Not sampled	0
Miranda C.S.D.	Miranda	492	Not sampled	0
Sky Forest MWC	Sky Forest	492	Not sampled	0
Westhaven C.S.D.	Trinidad	490	Not sampled	0
Rancheritos MWC	Apple Valley	487	None found	0
Walnut Hills Mutual Water Co	Paso Robles	486	Not sampled	0
Summit West Mutual Water Co.	Los Gatos	481	Not sampled	1
Willow Mobile Home Park	Martinez	481	Not sampled	0
El Dorado ID - Outingdale	Placerville	478	Not sampled	0
Lassen Pines Mutual Water Co Inc	Shingletoown	475	Not sampled	1
Lytle Springs WC	Lytle Creek	475	Not sampled	0
Berryessa Estates (Lbrid)	Napa	474	Not sampled	5
CSA 70 W - 4 Pioneertown	San Bernardino	474	Not sampled	29
U.S. Coast Guard Training Center	Petaluma	469	Not sampled	1
Belleview Oaks Mutual Water Co	Sonora	468	Not sampled	0
Fcsa 32 - Cantua Creek	Fresno	468	Not sampled	48
Glenwood Mobile Estates	Los Angeles	468	Not sampled	0
Vista Grande Water System	Gerber	468	Not sampled	1
Canyon Meadows Mutual Water	Bodfish	465	Not sampled	2
Brock Mutual Water Company	Bakersfield	462	Not sampled	29
San Simeon CSD	San Simeon	462	Not sampled	3
Gridley Farm Labor Housing	Chico	460	Not sampled	0
Rincon Valley Mobile Estates	Novato	460	Not sampled	1
Point Arena Water Works	Point Arena	459	Not sampled	0
Trailer Haven Mobile Home Park	Sacramento	459	Not sampled	0
Buena Vista Migrant Center	Modesto	455	Not sampled	0
Cloverdale Mutual Water Co.	Oxnard	455	Not sampled	0
Loma Linda University	Loma Linda	455	PFOS, PFHxS	0
Camp Saratoga	Saratoga	450	Not sampled	0
Colusa Co. Service Area #1 - Century Ranch	Colusa	450	Not sampled	0
County Service Area 11	Redwood City	450	Not sampled	1
Glen Martin MWC	Angelus Oaks	450	Not sampled	1
Golden Sands Mobile Home Park	Rosemead	450	Not sampled	1
Lassen County Water Works District #1	Bieber	450	Not sampled	0
Madera Mh & Rv Park	Madera	450	Not sampled	0
Olympia Mobilodge	Fair Oaks	450	PFOA, PFHxS	0
Shadow Acres Mutual Water Company	Palmdale	450	Not sampled	0
Lake County CSA 13 - Kono Tayee	Lakeport	449	Not sampled	0
Warner Springs Estates	Temecula	448	Not sampled	0
Weott C.S.D.	Weott	448	Not sampled	1
Antelope Park Mutual Water Company	Lancaster	445	Not sampled	0
Coast Springs - Cal. Water Service (Puc)	San Jose	445	Not sampled	0
MI Wuk Heights MWC	MI Wuk Village	445	Not sampled	0
Fcsa 49 - Five Points	Fresno	440	Not sampled	24
Garden Farms C.W.D.	Atascadero	440	Not sampled	0
Bennett Ridge Mutual Water Company	Santa Rosa	439	Not sampled	0
Psmcsd - Vega Rd WS #01	Royal Oaks	438	Not sampled	0
Son Shine Properties	Edison	438	Not sampled	36
City of Tehama	Tehama	436	Not sampled	0
Sunnyside Farms Mutual Water Company	Palmdale	436	Not sampled	1
El Rio Estates	Anderson	434	Not sampled	1
Stockdale Annex Mutual Water	Bakersfield	433	Not sampled	0
Yolo Co Housing Authority - El Rio Villa	Woodland	432	Not sampled	0
California Pines C.S.D.	Alturas	431	Not sampled	1
Sky View County Water	Paynes Creek	429	Not sampled	1
Strickland Mutual Water Company	Oxnard	429	Not sampled	0
Morada Estates N PWS #46	Stockton	426	Not sampled	0
Ward Well Water Company	Tahoe City	425	Not sampled	0
USMC - Housing Coleville	Bridgeport	424	Not sampled	0
East Orosi Community Services District	Visalia	423	Not sampled	29
Villa del Monte MWC	Los Gatos	422	Not sampled	0
NAS North Island & Nab Coronado	San Diego	421	None found	0
Los Robles Mobile Home Estates	Paso Robles	420	Not sampled	0
Santa Rosa Mobile Estates	San Leandro	420	Not sampled	0
Yosemite West Water System	Mariposa	420	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.

1,101 to 1,200 of 2,762, by people served

Where to go next