California utilities 2,401 to 2,500.

Each serves 41 to 50 people, as it reports to EPA. Your ZIP code finds yours faster.

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2,401 to 2,500 of 2,762, by people served

California utilities, 2,401 to 2,500 of 2,762, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
Esterina Properties	Santa Barbara	50	Not sampled	1
Galindo Housing Facility	Indio	50	Not sampled	0
Gosford Road Water Company	Bakersfield	50	Not sampled	0
Graton Mutual Water System	Rohnert Park	50	Not sampled	0
Holly Ranch Village	Fort Bragg	50	Not sampled	0
Hunter'S Fishing Resort	Millbrae	50	Not sampled	1
Lancaster Park Mobile Home Park	Lancaster	50	Not sampled	34
Marquez Rental	Firebaugh	50	Not sampled	4
Meadowbrook Oaks	Rocklin	50	Not sampled	1
Midway Mobilehome Park	Ojai	50	Not sampled	0
Mount Madonna Center	Watsonville	50	Not sampled	0
Norris Canyon Property Owners Assn	Castro Valley	50	Not sampled	1
Owens Peak South	Ridgecrest	50	Not sampled	0
Pesante Rd WS #06	Salinas	50	Not sampled	1
Pine Valley Bible Conference Center	Pine Valley	50	Not sampled	0
Rancho Salinas Mbwc	Paso Robles	50	Not sampled	0
Ridgeview Estates MWC	Boulder Creek	50	Not sampled	0
Round Mountain Water Company	Bakersfield	50	Not sampled	29
Seafair Road and Water Company	Mendocino	50	Not sampled	0
Springwood Estates MWC	Hollister	50	Not sampled	0
Tahoe Park Water Co - Skyland/Nielsen	Eldorado Hills	50	Not sampled	0
Tennant C.S.D.	Macdoel	50	Not sampled	2
Tierra Buena MHP #1	Zamora	50	Not sampled	1
Twin Creeks Mobile and Rv Village	Irvine	50	Not sampled	1
Venture Estates MWC	Hollister	50	Not sampled	0
Woodfords Mutual Water Company	Minden	50	Not sampled	1
Dutch Slough Water Works	Oakley	49	Not sampled	0
San Juan Rd WS #01	Aromas	49	Not sampled	0
Baumann Rd WS #01	Watsonville	48	Not sampled	0
Crystals	Santa Rosa	48	Not sampled	0
Eddy Drive	Sonoma	48	Not sampled	0
Fcsa 34b - Ventana Hills	Fresno	48	Not sampled	0
Kinnybrook Mutual Water Company	Kenwood	48	Not sampled	0
Maher Rd WS #05	Royal Oaks	48	Not sampled	0
MD 28 Ripperdan Self Help	Madera	48	Not sampled	0
Paradise Rd WS #21	Salinas	48	Not sampled	1
Pond Mutual Water Company	Wasco	48	Not sampled	6
Shasta View Heights Owners Association	Yreka	48	Not sampled	0
Tierra Verde MWC	Salinas	48	Not sampled	0
Tunnel Trailer Park	Walnut Grove	48	Not sampled	0
Athena Terrace Mutual Water Company	Santa Rosa	47	Not sampled	0
Grier Mutual Water Company	Springville	47	Not sampled	0
Sierra Mutual Water Company	Porterville	47	Not sampled	20
Sweet Water Co - Op	Inyokern	47	Not sampled	0
Alliance Redwoods Conference Grounds	Occidental	46	Not sampled	0
East Wilson Road Water Company	Bakersfield	46	Not sampled	27
Foothill WA	Salinas	46	Not sampled	1
Fowler Care Center	Fowler	46	Not sampled	0
Placer CWA - Monte Vista	Auburn	46	Not sampled	0
South County Retirement Home	San Martin	46	Not sampled	0
Aborn Heights Water Mutual Association	San Jose	45	Not sampled	0
Bear Valley Water Company	San Luis Obispo	45	Not sampled	0
Casa Medanos Water System	Walnut Creek	45	Not sampled	0
Chalfant Valley West M.W.C.	Bishop	45	Not sampled	0
Echo Valley Rd WS #05	Salinas	45	Not sampled	0
Freeport Marina	Sacramento	45	Not sampled	1
Gold Rock Ranch	Winterhaven	45	Not sampled	1
Golden Acres Trailer Park	Red Bluff	45	Not sampled	0
Hidden Meadow Mutual Water Co	Scotts Valley	45	Not sampled	0
Huckleberry Mutual Water Company	Cazadero	45	Not sampled	0
Ironwood Camp	Newberry Springs	45	Not sampled	47
Leisure Acres Mutual Water Company	North Fork	45	Not sampled	5
MD 85 Valeta	Madera	45	Not sampled	0
Mountain Village Homeowner'S Assoc	Forest Ranch	45	Not sampled	1
Norcal Water Works	Sacramento	45	Not sampled	0
Olive Dell Ranch	Colton	45	Not sampled	0
Panama Road Property Owners Assoc	Bakersfield	45	Not sampled	0
Summit View Ranch Mutual Water Co.	Santa Rosa	45	Not sampled	0
Sunny Acres Mws	Chualar	45	Not sampled	1
Valley View Ranches	Gilroy	45	Not sampled	2
Woodside WA	Carmel Valley	45	Not sampled	0
Woodson Bridge Rv Park	Corning	45	Not sampled	1
Burlando Heights Mutual Water Co.	Kernville	44	Not sampled	0
Camp Jones Gulch	La Honda	44	Not sampled	0
Choctaw Valley Mutual Water Co.	Bakersfield	44	Not sampled	0
Downtown Graton Mutual Water System	Graton	44	Not sampled	0
Forest Knolls Mutual Water Co	Forest Ranch	44	Not sampled	2
Mountain View MHP	Visalia	44	Not sampled	0
Pine Ridge Park Estates	Red Bluff	44	Not sampled	1
Rancho del Oro MHP	Placida	44	Not sampled	0
Rancho Nipomo Water Company	Arroyo Grande	44	Not sampled	0
Rio Ranch Community Svcs Dist	Red Bluff	44	Not sampled	0
Viking Rv Park	Kingsburg	44	Not sampled	0
Aberdeen Water System	Crowley Lake	43	Not sampled	0
Emerald Valley Mutual Water Company	Gilroy	43	Not sampled	0
Lakeview Apartments	Watsonville	43	Not sampled	1
Rubys Valley Care Home	West Des Moines	43	Not sampled	1
San Augustin Mutual Water Company	Gaviota	43	Not sampled	0
Sierra Vista Association	Clovis	43	Not sampled	40
Bass Lake Annex 3	Wishon	42	Not sampled	6
Branscomb Mobile Home Park	Rohnert Park	42	Not sampled	3
Bucktail Mutual Water Company	Napa	42	Not sampled	1
Kranenburg Water System	Bakersfield	42	Not sampled	0
Meadowridge Mutual Water Co	Freedom	42	Not sampled	0
MT Ararat Mobile Home Park	Oak View	42	Not sampled	0
Paradise Rd WS #05	Prunedale	42	Not sampled	0
Point Cabrillo Highlands	Oakland	42	Not sampled	0
Rancho Chaparral MWC	Big Sur	42	Not sampled	0
Sierra North Community Service District	Bishop	42	Not sampled	0
Brandon Creek Mws	Carmel	41	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.

2,401 to 2,500 of 2,762, by people served

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