California utilities 401 to 500.

Each serves 7,772 to 13,540 people, as it reports to EPA. Your ZIP code finds yours faster.

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401 to 500 of 720, by people served

California utilities, 401 to 500 of 720, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
City of Kingsburg	Kingsburg	13,540	None found	0
Westborough Water District	South San Francisco	13,486	None found	0
Tud - Upper Basin Water System	Sonora	13,280	None found	0
Palomar Christian Conference Center	Palomar Mountain	13,050	Not sampled	0
Indian Hills Camp	Jamul	13,032	Not sampled	11
Muscoy MWC No. 1	San Bernardino	13,000	None found	0
Sbdno County Service Area 70j	San Bernardino	12,843	None found	0
Yocha Dehe Potable Water System	Brooks	12,800	None found	0
Big Bear City CSD	Big Bear City	12,738	PFOA, PFOS, PFHxS, PFBS	0
City of Grover Beach Public Works Dept	Grover Beach	12,701	None found	0
City of Lindsay	Lindsay	12,659	PFOA, PFOS, PFBS	127
Camp Pendleton (North)	Camp Pendleton	12,651	None found	1
Los Angeles Cwwd 40, Reg. 38 - Lake la	Alhambra	12,568	None found	0
City of Dixon	Dixon	12,540	None found	0
Cal - Water Service Co. - Marysville	San Jose	12,419	None found	0
Sycuan	El Cajon	12,350	None found	0
City of Newman - Water Department	Newman	12,207	None found	1
Thermalito Water & Sewer Dist	Oroville	12,136	PFOS	1
City of Fortuna	Fortuna	12,133	None found	0
Montecito Water Dist	Santa Barbara	11,962	None found	0
Signal Hill - City, Water Dept.	Signal Hill	11,848	None found	5
Town of Hillsborough	Hillsborough	11,766	None found	0
City of Sonoma	Sonoma	11,725	PFOA	0
Crestline Village CWD - Division 10	Crestline	11,650	PFOA, PFOS, PFHxS, PFNA, PFBS	0
Greenfield County WD	Bakersfield	11,590	None found	14
Ccwd - Ebbetts Pass	San Andreas	11,545	None found	4
Los Angeles Cwwd 40, R 24,27,33 - Pearblsm	Alhambra	11,509	None found	0
City of Bell Gardens	Bell Gardens	11,437	PFOA, PFOS, PFHxS, PFBS	0
City of Mendota	Mendota	11,404	None found	0
Edwards AFB - Main Base	Edwards AFB	11,316	None found	1
Red Hawk Casino - Shingle Springs	Shingle Springs	11,268	None found	0
Scotts Valley Water District	Scotts Valley	11,197	None found	0
City of Exeter	Exeter	11,169	None found	1
City of Anderson	Anderson	11,147	None found	1
Cal - Water Service Co. - Oroville	San Jose	11,106	None found	0
Tud - Sonora/Jamestown Water System	Sonora	11,054	None found	0
Casitas Municipal Water Dist	Oak View	11,005	None found	1
Sierra Madre - City, Water Dept.	Sierra Madre	11,000	None found	0
Sonoma State University	Rohnert Park	10,986	None found	1
City of Healdsburg	Healdsburg	10,985	PFHxS, PFBS	0
Del Oro Water Co. - Paradise Pines	Chico	10,940	Not sampled	0
Gswc - Willowbrook	Anaheim	10,793	None found	0
Table Mountain Rancheria	Table Mountain	10,675	None found	6
California Institution for Men	Chino	10,667	None found	5
City of Shasta Lake	Shasta Lake 4510007	10,657	None found	0
California Water Service Co. - Dixon	San Jose	10,623	None found	0
City of Rio Vista	Rio Vista	10,489	None found	0
Plumas Lake	Olivehurst	10,464	None found	0
City of Cloverdale	Cloverdale	10,398	None found	0
City of Farmersville	Farmersville	10,243	None found	1
South Mesa WC	Calimesa	10,108	PFHxS, PFBS	0
SCWA - Arden Park Vista	Sacramento	10,101	PFOA, PFOS	1
Valley Water Co.	La Canada Flintridge	10,070	None found	0
Cal - Am Water Company - East Pasadena	Rosemead	9,949	None found	0
Lake Henshaw Resort Inc.	Santa Ysabel	9,913	Not sampled	1
Ccwd - Jenny Lind	San Andreas	9,861	None found	0
Golden Hills CSD	Tehachapi	9,857	PFOA, PFOS, PFHxS, PFBS	0
City of Blythe -	Blythe	9,798	None found	1
Winton Water & Sanitary Dist	Winton	9,745	None found	1
San Gabriel Valley Water Co - Montebello 1	El Monte	9,630	None found	0
Viejas Community System	Alpine	9,600	PFBS	0
City of Orange Cove	Orange Cove	9,525	None found	1
Myoma Dunes Mutual Water Company	Bermuda Dunes	9,445	None found	0
Georgetown Divide PUD	Georgetown	9,434	None found	0
City of Huron	Huron	9,306	None found	28
La Canada Irrigation Dist.	La Canada	9,300	None found	0
City of Live Oak	Live Oak	9,285	None found	0
California State Fair	Sacramento	9,280	PFOS, PFBS	0
Placerville, City of - Main	Placerville	9,224	None found	0
Rubio Canon Land & Water Association	Altadena	9,215	PFOA, PFOS, PFHxS, PFBS	0
Paradise Irrigation District	Paradise	9,142	None found	0
Nevada ID - Lake Wildwood	Grass Valley	9,108	None found	0
City of Tehachapi	Tehachapi	9,094	None found	1
Clear Creek CSD - Anderson	Anderson	8,900	None found	0
Guadalupe Water Department	Guadalupe	8,897	None found	0
Cal Am - West Placer	Sacramento	8,861	None found	0
Awa Buckhorn Plant	Sutter Creek	8,791	None found	1
City of Waterford	Modesto	8,788	None found	0
City of Needles	Needles	8,766	None found	0
Tract 349 Mutual Water Co.	Cudahy	8,700	PFOA, PFOS, PFHxS	0
Naval Base Ventura County, Port Hueneme	Point Mugu	8,625	Not sampled	0
City of Gonzales	Gonzales	8,327	None found	0
Orosi Public Utility District	Orosi	8,300	None found	0
City of Orland	Orland	8,298	None found	0
City of Corning	Corning	8,244	None found	0
La Puente Valley CWD	La Puente	8,243	None found	0
Mammoth CWD	Mammoth Lakes	8,234	None found	1
Gswc - Hollydale	Anaheim	8,099	None found	0
Firebaugh City	Firebaugh	8,096	None found	0
Pismo Beach Water Department	Pismo Beach	8,036	None found	3
Templeton CSD	Templeton	8,011	PFHxS, PFBS	0
California - American Larkfield (Puc)	Sacramento	7,913	None found	0
Kirkwood Meadows Public Utility District	Kirkwood	7,851	None found	0
City of Woodlake	Woodlake	7,846	None found	0
Florin County Water District	Sacramento	7,831	PFOA, PFOS, PFHxS	0
City of Yreka	Yreka	7,825	None found	1
City of Susanville	Susanville	7,811	None found	0
Delhi CWD	Delhi	7,784	PFOS, PFHxS	0
Valencia Heights Water Co.	West Covina	7,775	PFOA, PFOS, PFHxS, PFBS	0
Highlands Mutual Water Company	Clearlake	7,772	None found	4

Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. People served is what each utility reports to EPA. Data: EPA SDWIS 2026 Q2 and UCMR 5.

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California utilities 401 to 500.

401 to 500 of 720, by people served

Where to go next

Read your utility’s own report

Every contaminant

Filters, checked