California utilities 1,801 to 1,900.

Each serves 109 to 130 people, as it reports to EPA. Your ZIP code finds yours faster.

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1,801 to 1,900 of 2,762, by people served

California utilities, 1,801 to 1,900 of 2,762, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
Old River Mutual Water Company	Clovis	130	Not sampled	17
Rio Bend Rv Golf Resort & Storm Crossing	El Centro	130	Not sampled	1
Rocky Comfort Mutual Water Co	Mentone	130	Not sampled	0
Roseland Mobile Home Park	San Juan Capistrano	130	Not sampled	0
Salyer Heights W.S., Inc	Salyer	130	Not sampled	6
Skp Park of the Sierras Inc	Coarsegold	130	Not sampled	1
Teen Challenge	Reedley	130	Not sampled	0
Trinidad Extended Stay Rv	Sacramento	130	Not sampled	0
Yosemite Terrace Estates	Greeley Hill	130	Not sampled	1
Coastlands Mws (Post Creek)	Big Sur	129	Not sampled	1
End - O - Valley Mutual Water Company	Santa Rosa	129	Not sampled	0
Rancho Ynecita	Los Olivos	129	Not sampled	0
Sierra Twain Harte MHP	Jamestown	129	Not sampled	0
Valley Creek MHP WS	Bulverde	129	Not sampled	14
Assisi MWC	Salinas	126	Not sampled	1
Bar - Len MWC	Barstow	126	None found	43
Brookside Mobile Home Park	Costa Mesa	126	Not sampled	0
Camphora Apartments	Hayward	126	Not sampled	0
Crestwood Heights Water Assn	Watsonville	126	Not sampled	0
Fircrest Mutual Water Company	Sebastopol	126	Not sampled	0
Lili Valley Water Co.	West Point	126	Not sampled	1
Plavada Community Association	Soda Springs	126	Not sampled	0
Princes Camp Resort WS	Salinas	126	Not sampled	0
Riverview Mobile Home Park	Sacramento	126	Not sampled	0
Shadow Mountain MHP	San Juan Capistrano	126	Not sampled	0
Coyote Valley Mutual Water Co	Ocotillo	125	Not sampled	1
Emigrant Gap Mutual Water Co.	Emigrant Gap	125	Not sampled	0
Fire Suppression Camp #19	Diamond Bar	125	Not sampled	0
Jarvis Mutual Water System	Santa Cruz	125	Not sampled	1
Lazy B Mobilehome Park	San Mateo	125	Not sampled	2
Mitchells Camp Family Assoc.	Palo Verde	125	Not sampled	1
New Hope Landing General Store	Sacramento	125	Not sampled	1
Spanish Lakes Mutual Water Co	Templeton	125	Not sampled	0
Creekside Cabins & Rv Resort	Henderson	124	Not sampled	1
Gilbert Street Complex	San Bernardino	124	Not sampled	0
Phillipsville C.S.D.	Phillipsville	124	Not sampled	2
Sierra King Homeowners Assn	Three Rivers	124	Not sampled	0
Bethel Island Mutual Water Co	Bethel Island	123	Not sampled	0
Lockeford Mobile Home Park WTR Sys	Concord	123	Not sampled	0
Oak Knolls Mutual Water Company	Lake Isabella	123	Not sampled	6
Long Canyon Water Company Corp.	Bakersfield	122	Not sampled	0
Nevada ID - Smartsville	Grass Valley	122	Not sampled	0
Amberwood Estates, LLC	Stockton	120	Not sampled	0
Big Wheel Mobile Home Park	Stockton	120	Not sampled	1
Bluffs WS	Salinas	120	Not sampled	0
Dolan Rd MWC	Moss Landing	120	Not sampled	0
Fisherman'S Bend MHP	Gustine	120	Not sampled	0
Golden State Water Desert View	Apple Valley	120	Not sampled	0
Lakeview Ranchos Mutual Water Company	Weldon	120	Not sampled	33
Las Palmas Mobile Home Park	Eureka	120	Not sampled	1
Meadow Lakes Club	Fresno	120	Not sampled	0
New Auberry Water Association	Auberry	120	Not sampled	0
Oak Haven Association	Temecula	120	Not sampled	0
Pesante Rd WS #02	Salinas	120	Not sampled	0
Quiet Oaks Mobile Home Park	Stockton	120	Not sampled	40
San Marcos Mutual Water Company	Santa Barbara	120	Not sampled	0
Sugar Pine Homeowners Assoc	Oakhurst	120	Not sampled	1
City of Modesto - Central Turlock	Modesto	119	Not sampled	0
Dune 3 Mutual Water Company, LLC	Morro Bay	119	Not sampled	0
Page Avenue Mutual Water Company	Fullerton	119	Not sampled	0
San Antonio Canyon Msc	MT. Baldy	119	Not sampled	0
Spring Creek Estates PWS	Stockton	119	Not sampled	0
Fcwwd 37/mile High	Fresno	118	Not sampled	0
Forest Ranch Mutual Water System	Forest Ranch	118	Not sampled	1
Grizzly Ranch CSD	Portola	118	Not sampled	0
Laguna del Sol Inc	Wilton	118	Not sampled	0
St Francis Tract Water System	Freedom	118	Not sampled	0
Lazy H Mutual Water Company	Pauma Valley	117	Not sampled	0
Callender Grove Mutual Water	San Luis Obispo	116	Not sampled	0
Redcrest Water Works	Whitethorn	116	Not sampled	4
Bobcat Springs Mutual Water Company	Buellton	115	Not sampled	0
Burnt Ranch Estates	Burnt Ranch	115	Not sampled	2
Clear Ridge WA	Big Sur	115	Not sampled	0
Fcsa 14 - Belmont Manor	Fresno	115	Not sampled	0
Dingerville USA Park	Yorba Linda	114	Not sampled	0
Big Lagoon CSD	Trinidad	112	Not sampled	0
Brand Water Company	Oakland	112	Not sampled	0
Corning Rv Park	Corning	112	Not sampled	1
Crystal Caves MHP	Placerville	112	Not sampled	0
Hi Desert MWC	Barstow	112	Not sampled	8
Morada Manor Water System	Stockton	112	Not sampled	1
Pinon Valley Water Company	Tehachapi	112	Not sampled	0
Twin Cypress Mobile Home Park	Oakdale	112	Not sampled	0
West Park Properties	Crescent City	112	Not sampled	1
Camanche South Shore - EBMUD	Valley Springs	111	Not sampled	1
Cdf - Owens Valley Conservation Camp	Bishop	110	Not sampled	1
Del Rio East HOA Water System	Stockton	110	Not sampled	0
Floriston Water System	Floriston	110	Not sampled	0
Halcyon Water System	Halcyon	110	Not sampled	1
Mission Farm R.V. Park	San Juan Bautista	110	Not sampled	1
Placer CWA - Bianchi Estates	Auburn	110	Not sampled	0
Rancho del Paradiso - Cal Water Svc (Puc)	San Jose	110	Not sampled	0
Russos Mobile Park	Bethel Island	110	Not sampled	1
Three Springs Ranch Mutual Water Company	MT. Hamilton	110	Not sampled	0
Yosemite Forks Est Mutual	Oakhurst	110	Not sampled	35
Del Oro WC - Larkspur Meadows	Chico	109	Not sampled	0
Oak Grove Mobile Home Park	Bell Canyon	109	Not sampled	1
San Cayetano Mutual Water Co	Fillmore	109	Not sampled	0
Shasta Co CSA # 13 Alpine Meadows	Redding	109	Not sampled	1
Sun Mountain M.W.C.	MT. Shasta	109	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.

1,801 to 1,900 of 2,762, by people served

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