California utilities 1,901 to 2,000.

Each serves 93 to 109 people, as it reports to EPA. Your ZIP code finds yours faster.

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1,901 to 2,000 of 2,762, by people served

California utilities, 1,901 to 2,000 of 2,762, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
Sunrise Mutual Water Co.	Visalia	109	Not sampled	1
Holly Hills MWC	Salinas	108	Not sampled	0
Lake Henshaw Resort Inc.	Santa Ysabel	108	Not sampled	1
Las Ventanas Ranch	San Luis Obispo	108	Not sampled	0
Valley Oaks MHP WS	Lockwood	108	Not sampled	0
California Conservation Camp #14	Diamond Bar	107	Not sampled	0
Sunnyside Convalescent Hosp	Fresno	107	Not sampled	2
Gold Mountain CSD	Portola	106	Not sampled	1
Kings River Estates Mutual Water Company	Kingsburg	106	Not sampled	0
Paradise Mobile Estates	San Juan Capistrano	106	Not sampled	0
South Fork Estates Mutual Water Co	Three Rivers	106	Not sampled	0
Walnut Acres	Stockton	106	Not sampled	0
Wildwood Mobile Home Pk Inc	Fresno	106	Not sampled	1
Cove Mobile Villa	Sacramento	105	Not sampled	0
Mono Vista Ranch MHP	Rancho Cucamonga	105	Not sampled	0
Morada Acres Water System	Stockton	105	Not sampled	0
Oak Heights W & R Co Inc	Salinas	105	Not sampled	15
St. Clair Ranchos Mutual Water Co.	Bakersfield	105	Not sampled	0
Varian Ranch Mutual Water	Arroyo Grande	105	Not sampled	0
Lodi Lake Mobile Home Park	Woodbridge	104	Not sampled	0
Mecchi Water Company	Lodi	104	Not sampled	0
Oak Dell Park	Saratoga	104	Not sampled	0
Pinyon Crest HOA	Palm Desert	104	Not sampled	1
Sce/Big Creek Powerhouse 1	Rosemead	104	Not sampled	1
Westwind Mobile Home Park	Lake Oswego	104	Not sampled	1
Gateway Mobile Home Park	Clayton	103	Not sampled	0
Mountain View Duplexes	Kingsburg	103	Not sampled	0
Rancho Robles Mutual Water Company	San Martin	103	Not sampled	0
Southwest Tract W M D [sws]	Sacramento	103	Not sampled	1
Volcano Community Service Dist	Volcano	103	Not sampled	0
Betabel Rv Resort	San Juan Bautista	102	Not sampled	1
Golden Meadows CSD	Red Bluff	102	Not sampled	0
McMahon Road Mutual Water Company	Hollister	102	Not sampled	0
Oak Trail Ranch	Santa Ynez	102	Not sampled	0
Rancho Santa Teresa Mw Co.	Ramona	102	Not sampled	20
Rush Creek Mutual Water System	Weaverville	102	Not sampled	0
Asoleado MWC	Carmel Valley	101	Not sampled	0
B & W Resort Marina	Isleton	100	Not sampled	6
Bear State Water Works	Georgetown	100	Not sampled	0
Cdf - Konocti Conservation Camp No. 27	Lower Lake	100	Not sampled	0
Cherry Lane Trailer Park	Stockton	100	Not sampled	0
Comstock Mutual Water Company	Hollister	100	Not sampled	0
Ecco	Oakhurst	100	Not sampled	2
Fairway Downs Mutual Water Co	Plumas Lake	100	Not sampled	1
Fiddletown Community Service	Fiddletown	100	Not sampled	1
Glennville Mutual Water Company	Glennville	100	Not sampled	0
Glenwood Mobile Home Park	San Ramon	100	Not sampled	3
Guatay Mutual Benefit Corporation	Guatay	100	Not sampled	48
Haven Acres River Club Inc	Lathrop	100	Not sampled	0
Hess Winery	Napa	100	Not sampled	1
Laguna Mountain Mutual Water Co.	MT Laguna	100	Not sampled	0
MD 42 Still Meadow	Madera	100	Not sampled	67
MD 43 Miami Creek Knolls	Madera	100	Not sampled	0
Meadow Estates Mutual	Boonville	100	Not sampled	0
Midland School	Los Olivos	100	Not sampled	0
Montecito Sea Meadows	Santa Barbara	100	Not sampled	0
North Trails Mutual Water Company	Agua Dulce	100	Not sampled	16
Oasis Property Owners Association	Bakersfield	100	Not sampled	13
Rancho Borromeo MWC	Salinas	100	Not sampled	0
Riselen Park	Sacramento	100	Not sampled	0
River View Mhc LLC	Sacramento	100	Not sampled	0
Sa 14 Chuk Chanse Subdivision	Madera	100	Not sampled	0
San Miguel WS #01	Royal Oaks	100	Not sampled	18
Sandmound Mutual	Bethel Island	100	Not sampled	1
Shasta Cascade Mobilehome Park	Honolulu	100	Not sampled	1
Sierra Estates Mutual Water Company	Penn Valley	100	Not sampled	1
Sierra Park Water Company Inc.	MI - Wuk Village	100	Not sampled	0
Solano Verde Mutual Water Co	Camarillo	100	Not sampled	0
Spindrift Marina	St. Helena	100	Not sampled	0
Sunrise Mountain Mutual Water Company	Cazadero	100	Not sampled	0
Willowside Terrace Water Association	Alpine	100	Not sampled	11
Alturas Fillmore MHP	Irvine	99	Not sampled	0
Anglers Subdivision 4	Bethel Island	99	Not sampled	0
Bend Mobilehome & Rv Park	Red Bluff	99	Not sampled	0
Cali Lake Rv Resort	Alta Loma	99	Not sampled	0
Del Oro Water Company - Buzztail Dist.	Chico	99	Not sampled	0
Dunrovin Mobile Home Village	Concord	99	Not sampled	0
Resthaven Mobile Home Park	Paso Robles	99	Not sampled	22
Donner Summit Public Utility District	Soda Springs	98	Not sampled	1
Evergreen Mutual Water Company	Lancaster	98	Not sampled	0
Liberty - Bellview Heights	Downey	98	Not sampled	0
Union Heights MWC	Hollister	98	Not sampled	0
West End MWC	Lucerne Valley	98	Not sampled	0
Long Barn Property Owners	Long Barn	97	Not sampled	0
Valley View Estates Mutual Water Co	Keene	97	Not sampled	0
Del Oro Water Co - Metropolitan District	Chico	96	Not sampled	9
Ocotillo Oasis, LLC	San Marcos	96	Not sampled	16
Rancho San Joaquin MWC	Hollister	96	Not sampled	3
49er Trailer Ranch	Columbia	95	Not sampled	0
Campers Inn - Rv & Golf Course	Alamo	95	Not sampled	0
Dunneville Estates CSA #50	Hollister	95	Not sampled	0
Fenner Canyon Youth Conservation Camp	Valyermo	95	Not sampled	1
Five Points Ranch	Five Points	95	Not sampled	0
Liberty Park Water Association	Huntington Beach	95	Not sampled	4
Shady Grove Mobile Home Park, LLC	Ventura	95	Not sampled	0
Summerhill MHP WS	Santa Cruz	95	Not sampled	0
Tucker Oaks East Water District	Anderson	95	Not sampled	2
Yokohl Mutual Water Co	Visalia	95	Not sampled	8
Bella Vista Water Sys	Moraga	93	Not sampled	14
Cal Am - Coarsegold	Sacramento	93	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.

1,901 to 2,000 of 2,762, by people served

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