California utilities 901 to 1,000.

Each serves 716 to 1,076 people, as it reports to EPA. Your ZIP code finds yours faster.

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

California utilities, 901 to 1,000 of 2,762, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
MI Wuk Village Mut WTR Co	MI Wuk Village	1,076	Not sampled	0
City of Trinidad	Trinidad	1,072	Not sampled	1
Bodega Bay Public Utility District	Bodega Bay	1,069	Not sampled	0
Forest Lakes MWC	Felton	1,067	Not sampled	0
City of Plymouth	Plymouth	1,060	Not sampled	2
Thunderbird CWD	Apple Valley	1,056	Not sampled	1
Cal Am - Goldside	Sacramento	1,053	Not sampled	0
California - American Geyserville (Puc)	Sacramento	1,050	None found	0
Fallsvale Service Company	Forest Falls	1,046	Not sampled	1
Placer CWA - Alta	Auburn	1,044	Not sampled	0
Ccwd - West Point	San Andreas	1,043	Not sampled	0
California Institution for Women	Corona	1,035	Not sampled	0
Indian Creek CSD	Bishop	1,030	Not sampled	0
Los Angeles Cwwd 40, Reg. 39 - Rock Creek	Alhambra	1,030	Not sampled	0
Kenwood Village Water Company (Puc)	Santa Rosa	1,029	Not sampled	0
Averydale MWC	Lancaster	1,026	None found	0
Cws Southlake System	San Jose	1,015	Not sampled	0
Baker Community Services District	Baker	1,000	Not sampled	2
China Lake Naval Air Weapons Station	China Lake	1,000	None found	0
Veterans Home of California	Yountville	1,000	Not sampled	1
Yosemite NPS - Yosemite Valley	Yosemite Np	1,000	Not sampled	0
Dempsey Road Mutual Water Co	Oxnard	990	Not sampled	0
Upper Lake County Water District	Upper Lake	989	Not sampled	0
Apple Valley Heights CWD	Apple Valley	983	Not sampled	1
City of Loyalton	Loyalton	983	Not sampled	0
Rio Manor Mutual Water Co	Camarillo	983	Not sampled	0
Sultana Community Services District	Sultana	983	Not sampled	1
Nyeland Acres Mutual Water Co	Oxnard	975	Not sampled	0
Desert Lake Comm Serv Dist	Boron	968	Not sampled	0
San Joaquin County - Thornton	Stockton	964	Not sampled	0
Del Oro Water Co. - Lime Saddle Marina	Chico	954	Not sampled	0
Leavitt Lake CSD	Susanville	950	Not sampled	0
Lawson S Landing	Dillon Beach	946	Not sampled	0
Rolling Green Utilities, Inc.	Big Pine	940	Not sampled	1
Psmcsd - Normco	Royal Oaks	928	Not sampled	0
City of Tulelake	Tulelake	925	Not sampled	1
Jacoby Creek CWD	Arcata	924	Not sampled	0
Lakeside Park Association	South Lake Tahoe	924	Not sampled	0
City of Modesto - Grayson	Modesto	917	Not sampled	0
Fcwwd 18/friant	Friant	909	Not sampled	0
Del Oro Water Co. - Johnson Park	Chico	908	Not sampled	0
Pinon Pines MWC	Frazier Park	908	Not sampled	1
Fern Valley WD	Idyllwild	900	Not sampled	0
Valley Springs PUD	Valley Springs	900	Not sampled	0
Rancho Pauma Mutual WC	Pauma Valley	899	Not sampled	1
California Water Service Co - Leona Valley	San Jose	895	Not sampled	0
South Midway City Mutual Water Co.	Midway City	891	Not sampled	0
City of Dorris	Dorris	887	Not sampled	1
Hillsview Homes	Modesto	887	Not sampled	0
Plantation on the Lake Park	Calimesa	885	Not sampled	0
Psmcsd - Sunny Mesa	Royal Oaks	880	Not sampled	0
Madison Service Dist	Madison	876	Not sampled	1
Lake of the Woods MWC	Frazier Park	875	Not sampled	12
Alpaugh Community Services District	Alpaugh	871	Not sampled	17
Descanso Community Water District	Sacramento	870	Not sampled	29
Cuesta la Honda Guild Inc	La Honda	863	Not sampled	4
Juniper Riviera CWD	Apple Valley	858	Not sampled	3
McKinney Water District	Folsom	853	Not sampled	0
San Joaquin County - Wilkinson Manor	Stockton	851	Not sampled	0
Los Prietos Complex	Solvang	845	Not sampled	0
Apple Valley Foothill CWD	Apple Valley	841	Not sampled	1
First Mace Meadow # 1	Pine Grove	838	Not sampled	4
Tahoe City PUD - Tahoe Swiss Village	Tahoe City	837	Not sampled	0
Herlong Public Utility District	Herlong	831	Not sampled	0
Tud - Apple Valley Estates	Sonora	829	Not sampled	0
Canon Manor Water System	Santa Rosa	828	Not sampled	0
Loleta C.S.D.	Loleta	828	Not sampled	0
Limoneira Ranch #1	Santa Paula	813	Not sampled	0
Resort Improvement District #1	Whitethorn	803	Not sampled	0
John Latoracca Correctional Facility	Merced	800	Not sampled	0
Senior Canyon Mutual Water Co	Ojai	800	Not sampled	2
Big Pine CSD	Big Pine	798	Not sampled	0
Manila Community Services Dist.	Arcata	798	Not sampled	0
Ponderosa Basin Mutual WTR Co	Mariposa	798	None found	0
West Valley County Water District	Sacramento	798	Not sampled	0
Daggett Comm Svcs Dist	Daggett	795	Not sampled	35
Ivcsd - Greenville	Greenville	795	Not sampled	0
Los Angeles Cwwd 40, Reg. 35 - N.E. L.A.	Alhambra	792	Not sampled	0
Sonora Water Resources, Inc	Claremont	785	Not sampled	0
Mountain Mesa WC	Bakersfield	777	Not sampled	0
Riverside CSA #122 - Mesa Verde	Blythe	766	None found	0
Meadowcreek Mutual Water Company	Bishop	764	Not sampled	0
Jubilee MWC	Lucerne Valley	759	Not sampled	0
Pacific Union College	Angwin	758	Not sampled	0
California Rehabilitation Center - Norco	Norco	750	PFHxS	0
Riverdale Village	Bakersfield	750	Not sampled	1
Shasta Forest Village M.W.C.	Shingletown	750	Not sampled	0
Tahoe Park Water Company	Eldorado Hills	750	Not sampled	1
White Fence Farms MWC No.3	Lancaster	749	Not sampled	0
Deer Lodge Water System	Lake Arrowhead CA 92352	745	Not sampled	0
Victory Mutual Water Company	Bakersfield	740	Not sampled	0
Graeagle Water Company	Graeagle	737	Not sampled	0
Los Angeles Cwwd 21 - Kagel Canyon	Alhambra	736	Not sampled	0
High Valleys Water District	Banning	733	Not sampled	0
California Water Service Co - Lake Hughes	San Jose	732	Not sampled	0
Trinity Center M.W.C.	Trinity Center	729	Not sampled	0
Sierra CSA #5, Sierra Brooks	Downieville	726	Not sampled	1
City of Etna	Etna	720	Not sampled	0
Lacsd - Rimforest	Lake Arrowhead	717	Not sampled	0
Cws - Tulco Water Company	San Jose	716	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.

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

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