Drinking water / CA

PFAS in California drinking water

707 California public water systems tested under UCMR5. 239 detected at least one PFAS compound; 468 detected none at the reporting thresholds. Values are the highest single result per compound, in ng/L (parts per trillion). The federal limit for PFOA and PFOS is 4 ng/L.

Water system	Serves	Highest results (ng/L)	Reading
ADELANTO, CITY OF CA3610001	San Bernardino	PFHxS 4.7PFOS 4.5 *	above final limit
ARROYO GRANDE, WATER DEPARTMENT CA4010001	San Luis Obispo	PFBS 11PFOS 6.8 PFOA 5.8* PFHxS 5.5*	above final limit
ATASCADERO MUTUAL WATER CO CA4010002	San Luis Obispo	PFOS 22.3 PFBA 10PFBS 9.4PFOA 8.4* *	above final limit
ATASCADERO STATE HOSPITAL CA4010832	San Luis Obispo	PFHxS 34PFOS 33 PFPeS 6.1PFBS 5.5*	above final limit
AZUSA LIGHT AND WATER CA1910007	Los Angeles	PFOA 7.7 PFOS 5.8* PFHxA 3.5*	above final limit
BAKERSFIELD, CITY OF CA1510031	Kern	PFOS 8.4 PFNA 4.7PFHxS 4.2*	above final limit
BEAR VALLEY CSD CA1510038	Kern	PFOA 5.7 *	above final limit
BELLFLOWER - SOMERSET MWC CA1910013	Los Angeles	PFOS 17 PFHxS 5.1*	above final limit
BELLFLOWER MUNICIPAL WATER SYSTEM CA1910018	Los Angeles	PFOS 32.6 PFOA 7.6* PFHxS 5.6PFBA 5.2*	above final limit
BIG BEAR CITY CSD CA3610008	San Bernardino	PFHxS 36PFPeA 12PFHxA 11PFOS 9.9 *	above final limit
BIG BEAR LAKE DWP - BIG BEAR SYSTEM CA3610044	San Bernardino	PFBS 9.6PFHxS 6.6PFOS 6.1 PFOA 5.5* *	above final limit
CAL AM - MEADOWBROOK CA2410008	Merced	PFOS 8.3 *	above final limit
Cal Am - Suburban Rosemont CA3410010	Sacramento	PFOS 13.4 PFHxS 10.9PFBA 9PFOA 8.2* *	above final limit
CAL AM WATER COMPANY - MONTEREY CA2710004	Monterey	PFBS 13.2PFHxA 9.3PFPeA 9.2PFHxS 8.7	above final limit
CAL-AM WATER COMPANY - DUARTE CA1910186	Los Angeles	PFOS 5.1 *	above final limit
CAL-WATER SERVICE CO.-CHICO CA0410002	Butte	PFOS 22.5 PFHxS 22.1PFBS 9.6PFOA 6.8* *	above final limit
CALAM - ARDEN CA3410045	Sacramento	PFHxS 7.9PFOS 6 PFOA 6 PFPeA 4	above final limit
CALAM - PARKWAY CA3410017	Sacramento	PFOS 14.7 PFHxS 9.8PFHxA 4.6PFOA 4.3* *	above final limit
CALIFORNIA STATE FAIR CA3410026	Sacramento	PFOS 14 PFBS 4.3*	above final limit
CALIFORNIA STATE UNIVERSITY FRESNO CA1010339	Fresno	PFPeA 16PFBS 13PFOA 12 *PFHxA 11	above final limit
CALIFORNIA WATER SERVICE - LIVERMORE CA0110003	Alameda	PFOS 12 PFHxS 9.8PFOA 4.8* PFBS 4.2*	above final limit
CALIFORNIA WATER SERVICE - STOCKTON CA3910001	San Joaquin	PFOS 5.2 *	above final limit
CALIFORNIA WATER SERVICE CO. - ELA CA1910036	Los Angeles	PFPeA 12.9PFOS 8.6 PFBA 8PFHxA 7.6*	above final limit
CALISTOGA, CITY OF CA2810002	Napa	PFOS 12.2 PFOA 6.4* PFPeA 4.2PFHxA 3.2*	above final limit
CAMROSA WATER DISTRICT CA5610063	Ventura	PFBA 20PFOS 17 *	above final limit
CERES, CITY OF CA5010028	Stanislaus	PFOS 24 PFOA 12 PFPeA 8.4PFHxA 7.4	above final limit
CERRITOS - CITY, WATER DEPT. CA1910019	Los Angeles	PFOS 4.8 *	above final limit
CHOWCHILLA CITY WATER DEPT CA2010001	Madera	PFOA 4.5 *	above final limit
CITY OF ANAHEIM CA3010001	Orange	PFOS 29 PFBA 16.5PFPeA 12.4PFHxS 10.9*	above final limit
CITY OF ARCADIA CA1910003	Los Angeles	PFOS 10 PFHxS 4.8*	above final limit
CITY OF ATWATER CA2410001	Merced	PFHxS 59PFOS 45 PFOA 33 PFPeA 27	above final limit
CITY OF BELL GARDENS CA1910108	Los Angeles	PFOS 23 PFOA 14 PFHxA 9.4PFPeA 8.9	above final limit
CITY OF BUENA PARK CA3010003	Orange	PFOS 6.8 PFHxS 3.9*	above final limit
CITY OF CLOVIS CA1010003	Fresno	PFOS 41 PFOA 18 PFHxS 8.8PFPeA 8.4	above final limit
CITY OF FRESNO CA1010007	Fresno	PFPeA 47PFHxA 34PFHpA 31PFHxS 30	above final limit
CITY OF FULLERTON CA3010010	Orange	PFOS 13.3 PFPeA 13.2PFHxA 12.4PFOA 10.8* *	above final limit
CITY OF GARDEN GROVE CA3010062	Orange	PFOS 19 PFBA 14.6PFHxS 9.6PFPeA 8.6*	above final limit
CITY OF GILROY CA4310004	Santa Clara	PFBS 9.4PFOA 8 PFPeA 7.8*PFHxA 7	above final limit
CITY OF GRIDLEY CA0410004	Butte	PFHxS 12.8PFOS 10.5 PFNA 9.9PFPeA 6.5*	above final limit
CITY OF HUNTINGTON BEACH CA3010053	Orange	PFOS 6.1 PFHxS 3.3*	above final limit
CITY OF LATHROP CA3910015	San Joaquin	PFOS 17 PFBS 5PFHxS 3.5*	above final limit
CITY OF LINCOLN CA3110004	Placer	PFHxS 8.5PFOS 4.3 *	above final limit
CITY OF MERCED CA2410009	Merced	PFHxS 15PFOS 8.9 PFOA 6.1* PFHxA 4.8*	above final limit
CITY OF ORANGE CA3010027	Orange	PFPeA 17.7PFOS 17 PFBA 12.6PFHxS 10.2*	above final limit
CITY OF PLEASANTON CA0110008	Alameda	PFOS 26 PFHxS 22PFBA 6.3PFBS 6.1*	above final limit
CITY OF RED BLUFF CA5210004	Tehama	PFOA 7.4 PFPeA 6.7PFHxA 6PFHpA 5.5*	above final limit
CITY OF REDDING CA4510005	Shasta	PFOA 16.2 PFOS 12.6* PFHxS 8.9PFBS 8.9*	above final limit
CITY OF SACRAMENTO MAIN CA3410020	Sacramento	PFOS 41.4 PFHxS 19.1PFOA 17.3* PFBA 7.4*	above final limit
CITY OF SANGER CA1010029	Fresno	PFOS 6.7 PFOA 5.6* PFPeA 5.1PFHxA 4.7*	above final limit
CITY OF SANTA ANA CA3010038	Orange	PFOS 14.2 PFOA 8.9* PFHxS 8.4PFPeA 5.9*	above final limit
CITY OF STOCKTON CA3910012	San Joaquin	PFOS 28 PFOA 6.7* PFBS 6.2*	above final limit
CITY OF TUSTIN CA3010046	Orange	PFOS 4.2 PFPeA 3.7PFHxS 3.5*	above final limit
CITY OF VACAVILLE CA4810008	Solano	PFOS 10 PFHxS 9.2PFOA 5.1* PFBS 3.7*	above final limit
CITY OF WESTMINSTER CA3010064	Orange	PFOS 5.3 *PFHxS 5	above final limit
CITY OF WHEATLAND CA5810004	Yuba	PFOS 11 PFHxS 9.2*	above final limit
COLTON, CITY OF CA3610014	San Bernardino	PFOS 18 PFBS 10PFOA 5.9* PFHxS 5.1*	above final limit
COMMERCE-CITY, WATER DEPT. CA1910050	Los Angeles	PFPeA 17.4PFHxA 13.6PFBS 9.7PFOA 9.3 *	above final limit
COMPTON-CITY, WATER DEPT. CA1910026	Los Angeles	PFOS 17 PFOA 4.9* PFHxS 4.1*	above final limit
CRESCENTA VALLEY CWD CA1910028	Los Angeles	PFPeA 8PFHxA 8PFBS 6.8PFOA 5.1 *	above final limit
CRESTLINE VILLAGE CWD - DIVISION 10 CA3610015	San Bernardino	PFHxS 18.3PFBS 12.2PFNA 7.1PFOS 5.2 *	above final limit
CWS - BAKERSFIELD CA1510003	Kern	PFOS 14 PFOA 9.1* PFHxS 7.3PFBS 6.6*	above final limit
CWS - NORTH GARDEN CA1510055	Kern	PFOS 4.6 *	above final limit
CWS - VISALIA CA5410016	Tulare	PFPeA 34PFBA 28PFHxA 15PFOS 6.9 *	above final limit
DELHI CWD CA2410006	Merced	PFHxS 8PFOS 7.3 *	above final limit
DOWNEY - CITY, WATER DEPT. CA1910034	Los Angeles	PFOS 44 PFPeA 27PFHxA 21PFOA 15	above final limit
EAST VALLEY WATER DISTRICT CA3610064	San Bernardino	PFOS 12 PFOA 9 PFBS 8.9PFPeA 4.7	above final limit
EL MONTE-CITY, WATER DEPT. CA1910038	Los Angeles	PFOS 4.4 PFHxS 3.2*	above final limit
FARM MUTUAL W.C. (THE) CA3310046	Riverside	PFHxS 5.1PFOS 4.3 PFOA 4.2* *PFHxA 3	above final limit
FLORIN COUNTY WATER DISTRICT CA3410033	Sacramento	PFOA 11.8 PFHpA 9.9PFHxA 9.2PFPeA 6.7*	above final limit
FOLSOM STATE PRISON CA3410032	Sacramento	PFOS 6.8 *	above final limit
GLENDALE-CITY, WATER DEPT. CA1910043	Los Angeles	PFBS 16.9PFOS 15.8 PFOA 14.8* PFPeA 12.2*	above final limit
GOLDEN HILLS CSD CA1510045	Kern	PFOA 18.6 PFPeA 9.3PFOS 7.8* PFHxA 7.3*	above final limit
GOLDEN STATE WATER CO - BARSTOW CA3610043	San Bernardino	PFOA 5.7 PFHxA 5.4PFHxS 5PFPeA 4.9*	above final limit
GOLDEN STATE WC - PLACENTIA/YORBA LINDA CA3010035	Orange	PFPeA 10.9PFHxA 7.7PFBA 6.7PFOS 6.5 *	above final limit
GOLDEN STATE WC - WEST ORANGE COUNTY CA3010022	Orange	PFOS 16 PFHxS 9.3PFOA 8.1* PFPeA 3.6*	above final limit
GREAT OAKS WC INC CA4310022	Santa Clara	PFHxS 8PFPeA 4.7PFOS 4.6 PFHxA 4.5*	above final limit
GROVELAND COMMUNITY SERV DIST CA5510009	Tuolumne	PFBA 7.2PFOS 4.9 *	above final limit
GSWC - ARTESIA CA1910004	Los Angeles	PFOS 13 PFHxS 3.4*	above final limit
GSWC - BELL, BELL GARDENS CA1910011	Los Angeles	PFOS 15 PFBA 11PFPeA 7.3PFHxA 6.6*	above final limit
GSWC - CLAREMONT CA1910024	Los Angeles	PFOA 12.9 PFOS 10.4* PFHxA 8.4PFPeA 6.4*	above final limit
GSWC-SAN DIMAS CA1910142	Los Angeles	PFBA 20PFOS 4.6 *	above final limit
GSWC-SOUTH ARCADIA CA1910212	Los Angeles	PFOS 22 PFHxS 7PFOA 5.5* *	above final limit
GUADALUPE VALLEY MID CA4110005	San Mateo	PFOA 9.6 PFOS 8.3* PFHpA 4.3PFHxA 4.2*	above final limit
HELENDALE COMMUNITY SERVICE DISTRICT CA3610112	San Bernardino	PFOS 23 PFHxS 14.6PFOA 13 PFBA 8.2	above final limit
HESPERIA WD CA3610024	San Bernardino	6:2 FTS 50.3PFOS 11.1 PFHxS 10.5PFOA 10.2* *	above final limit
HUNTINGTON PARK-CITY, WATER DEPT. CA1910049	Los Angeles	PFOS 23 PFHxS 5.1PFOA 5.1* *	above final limit
INGLEWOOD- CITY, WATER DEPT. CA1910051	Los Angeles	PFOA 4.4 *	above final limit
LA HABRA HEIGHTS CWD CA1910218	Los Angeles	PFOS 23 PFOA 11 PFPeA 9.9PFBA 8.3	above final limit
LAKE ARROWHEAD CSD CA3610005	San Bernardino	PFOA 14 PFOS 7.2* PFHxA 6.7PFHpA 5.7*	above final limit
LAKESIDE WD CA3710013	San Diego	PFHxS 5.8PFOS 4.8 PFBS 4.8*	above final limit
LAKEWOOD - CITY, WATER DEPT. CA1910239	Los Angeles	PFOS 18.5 PFHxS 3.4*	above final limit
LATON COMMUNITY SERVICES DISTRICT CA1010020	Fresno	PFOA 6.2 PFOS 6.1* PFBS 3.9*	above final limit
LIBERTY UTILITIES - BELLFLOWER-NORWALK CA1910211	Los Angeles	PFOS 59 PFPeA 17PFOA 16 PFHxS 11	above final limit
LIBERTY UTILITIES - LYNWOOD CA1910161	Los Angeles	PFOS 17 PFOA 5 PFHxS 4.8	above final limit
LINDSAY, CITY OF CA5410006	Tulare	PFOS 12 PFOA 9.2* PFBS 4PFPeA 3.6*	above final limit
LODI, CITY OF CA3910004	San Joaquin	PFBS 17PFOA 6.2 PFHxS 6.1PFOS 5.6* *	above final limit
LOMA LINDA UNIVERSITY CA3600152	San Bernardino	PFOS 4.2 PFHxS 3.1*	above final limit
LOMITA-CITY, WATER DEPT. CA1910073	Los Angeles	PFOS 4.3 PFHxS 4.1*	above final limit
LOS OSOS COMMUNITY SERVICES DISTRICT CA4010016	San Luis Obispo	PFBS 18PFPeA 16.8PFHxA 16.6PFOA 14.7 *	above final limit
LYNWOOD-CITY, WATER DEPT. CA1910079	Los Angeles	PFOS 23 PFOA 7.8* PFHxS 6.1PFPeA 3.3*	above final limit
MANTECA, CITY OF CA3910005	San Joaquin	PFHxS 19PFHxA 9.5PFOA 7 PFBS 3.9*	above final limit
MAYWOOD MUTUAL WATER CO. #1 CA1910084	Los Angeles	PFOS 11.3 *	above final limit
MAYWOOD MUTUAL WATER CO. #2 CA1910085	Los Angeles	PFOS 4.3 *	above final limit
MAYWOOD MUTUAL WATER CO. #3 CA1910086	Los Angeles	PFOS 26.4 PFOA 7.3* PFHxS 6.1*	above final limit
MODESTO, CITY OF CA5010010	Stanislaus	PFOS 26 PFHxS 9.3PFOA 8.6* PFPeA 6.7*	above final limit
MONROVIA-CITY, WATER DEPT. CA1910090	Los Angeles	PFHxA 14PFPeA 9.7PFOS 6.1 PFOA 5.4* *	above final limit
MONTE VISTA CWD CA3610029	San Bernardino	PFBA 11PFHxS 7.4PFOS 5.6 PFPeA 3.5*	above final limit
MONTEBELLO LAND & WATER CO. CA1910091	Los Angeles	PFOS 53 PFOA 16 PFBA 14PFBS 11	above final limit
NORCO, CITY OF CA3310025	Riverside	PFOS 31.4 PFBA 17.9PFHxS 13.8PFOA 13.7* *	above final limit
NORTHROP GRUMMAN CORP. CA1910097	Los Angeles	PFHxA 136.8PFBS 64.7PFPeA 37.6PFPeS 24.5	above final limit
NORWALK - CITY, WATER DEPT. CA1910191	Los Angeles	PFOS 26 PFHxS 7.6PFBA 5.6PFOA 5.2* *	above final limit
NUEVO WATER COMPANY CA3310026	Riverside	PFOA 7 PFOS 4.6* PFHxS 4.4PFHxA 4.4*	above final limit
OLYMPIA MOBILODGE CA3410022	Sacramento	PFOA 4.2 PFHxS 4PFPeA 3.8PFHpA 3.8*	above final limit
ONTARIO MUNICIPAL UTILITIES COMPANY CA3610034	San Bernardino	PFOA 30 PFHxA 7.1PFPeA 6.7PFBA 6.4*	above final limit
ORCHARD DALE WATER DISTRICT CA1910101	Los Angeles	PFOS 23 PFPeA 10PFOA 9.9* PFBA 8.8*	above final limit
PASO ROBLES WATER DEPARTMENT CA4010007	San Luis Obispo	PFPeA 22PFHxA 20PFBS 8.1PFHpA 6.3	above final limit
PETER PITCHESS HONOR RANCHO DETN. CTR CA1900046	Los Angeles	PFOS 6.5 PFOA 5 PFHxS 3.1	above final limit
PICO RIVERA - CITY, WATER DEPT. CA1910042	Los Angeles	PFOS 30 PFPeA 17PFOA 16 PFHxA 15	above final limit
PICO WD CA1910125	Los Angeles	PFOS 28 PFPeA 21PFHxA 17PFOA 14	above final limit
PINEDALE COUNTY WATER DISTRICT CA1010026	Fresno	PFPeA 20PFHxA 16PFHpA 13PFOA 12 *	above final limit
PLANADA CSD CA2410007	Merced	PFOS 14.7 PFHxS 6.5PFBS 3.7*	above final limit
PLEASANT VALLEY MUTUAL WATER CO CA5610008	Ventura	PFOS 11 PFOA 10.1* PFHxS 8.7PFBA 5.1*	above final limit
POMONA - CITY, WATER DEPT. CA1910126	Los Angeles	PFOS 18 PFHxS 7.9PFOA 7.1* PFPeA 4.4*	above final limit
PORTERVILLE, CITY OF CA5410010	Tulare	PFOS 23 PFOA 22 PFPeA 9.3PFBS 9.1	above final limit
POTRERO ELEMENTARY SCHOOL CA3700963	San Diego	PFHxS 250.2PFOA 188.3 PFHxA 95.2PFHpA 72.7*	above final limit
RANCHO CALIFORNIA WATER DISTRICT CA3310038	Riverside	PFOS 16 PFOA 11 PFBA 7.8PFPeA 7.7	above final limit
RANCHO LOS AMIGOS HOSPITAL CA1900679	Los Angeles	PFOS 26.2 PFOA 7.8* PFHxS 4.1*	above final limit
REDLANDS CITY MUD-WATER DIV CA3610037	San Bernardino	PFOS 5.8 PFHxS 4.8PFOA 4.3* *	above final limit
RIALTO, CITY OF CA3610038	San Bernardino	PFPeA 18PFHxA 17PFOA 7.3 PFBA 5.7*	above final limit
RIPON, CITY OF CA3910007	San Joaquin	PFOS 12 PFOA 5.2* PFHxS 3.5*	above final limit
RIVERSIDE HIGHLAND WATER COMPANY CA3610057	San Bernardino	PFOS 19 PFOA 18 PFPeA 17PFHxS 14	above final limit
ROHNERT PARK, CITY OF CA4910014	Sonoma	6:2 FTS 7.1PFHxS 5.7PFOS 4.5 *	above final limit
RUBIO CANON LAND & WATER ASSOCIATION CA1910140	Los Angeles	PFOS 19 PFHxS 11PFOA 8.5* PFBA 5.7*	above final limit
RUNNING SPRINGS WATER DISTRICT CA3610062	San Bernardino	PFOS 236.5 PFHxS 95.5PFHxA 19PFOA 15.9* *	above final limit
SAN DIEGUITO WD CA3710021	San Diego	PFHxA 4.9PFPeA 4.8PFOA 4.3 PFBS 3.4*	above final limit
SAN JOAQUIN COUNTY-MOKELUMNE ACRES CA3910017	San Joaquin	PFOS 13.5 PFBS 8.5PFOA 8.3* PFHxS 4.7*	above final limit
SAN JOSE WATER CA4310011	Santa Clara	PFOS 6.2 PFHxS 5.5*	above final limit
SANTA CLARITA VALLEY W.A.-SANTA CLARITA CA1910017	Los Angeles	PFOA 20.5 PFPeA 18.4PFOS 17.8* PFHxA 16.1*	above final limit
SANTA CLARITA VALLEY W.A.-VALENCIA DIVIS CA1910240	Los Angeles	PFPeA 22.6PFOA 16.9 PFHxA 14.2PFBA 13.3*	above final limit
SANTA FE SPRINGS - CITY, WATER DEPT. CA1910245	Los Angeles	PFOS 14 PFBA 14PFOA 6.9* PFBS 5.2*	above final limit
SANTA MONICA-CITY, WATER DIVISION CA1910146	Los Angeles	PFPeA 22PFHxA 17.9PFBA 8.8PFHpA 5	above final limit
SATIVA-L.A. CWD CA1910147	Los Angeles	PFOS 9.4 PFHxS 3.2*	above final limit
SCWA - ARDEN PARK VISTA CA3410002	Sacramento	PFOS 8.3 PFOA 5.5* PFPeA 3.6*	above final limit
SCWA - LAGUNA/VINEYARD CA3410029	Sacramento	PFOS 24 PFOA 14 PFPeA 9.6PFHxA 8.4	above final limit
SIERRA TAHOE MAIN LODGE CA0900659	El Dorado	PFOA 5 *PFBS 3	above final limit
SONOMA, CITY OF CA4910012	Sonoma	PFOA 6.2 PFHxA 6.1*	above final limit
SOUTH GATE-CITY, WATER DEPT. CA1910152	Los Angeles	PFOS 26 PFOA 10 PFPeA 6.3PFHxA 6.1	above final limit
SOUTH MONTEBELLO IRRIGATION DIST. CA1910153	Los Angeles	PFOS 20.1 PFOA 8.2* PFPeA 6.7PFHxA 6.6*	above final limit
SOUTH TAHOE PUD - MAIN CA0910002	El Dorado	PFPeA 22.4PFHxA 16.3PFHpA 6.5PFOA 6.1 *	above final limit
Suburban Water Systems - Whittier CA1910174	Los Angeles	PFOS 13 PFBA 8.6PFOA 6.3* *PFPeA 4	above final limit
SUBURBAN WATER SYSTEMS-LA MIRADA CA1910059	Los Angeles	PFOS 16 PFBA 9.5PFOA 7 PFBS 4.2	above final limit
SUNNYSLOPE COUNTY WATER DIST CA3510003	San Benito	PFOA 5.8 PFOS 5.1* PFHxA 3.5PFPeA 3.3*	above final limit
SWEETWATER AUTHORITY CA3710025	San Diego	PFBA 12.3PFOA 11.4 PFBS 11PFHxS 9.4*	above final limit
THERMALITO WATER & SEWER DIST CA0410008	Butte	PFOS 4.6 *	above final limit
TRACT 180 MUTUAL WATER CO. CA1910159	Los Angeles	PFOS 24 PFOA 6.5* PFHxS 5.9PFHxA 3.1*	above final limit
TRACT 349 MUTUAL WATER CO. CA1910160	Los Angeles	PFOS 36.5 PFOA 8.2* PFHxS 6.6PFBA 5.3*	above final limit
TRUCKEE-DONNER PUD, MAIN CA2910003	Nevada	PFPeA 4.6PFOA 4.6 PFHxA 4.4*	above final limit
UKIAH, CITY OF CA2310003	Mendocino	6:2 FTS 17.8PFBA 9.2PFOS 7.4 PFHxS 7.3*	above final limit
VALENCIA HEIGHTS WATER CO. CA1910163	Los Angeles	PFOA 5.7 PFBS 4.4PFOS 4.4* PFHxA 4.3*	above final limit
VALLEY OF THE MOON WATER DISTRICT CA4910013	Sonoma	PFOS 5.4 PFOA 5.2* PFBS 4.2PFHxS 4.2*	above final limit
WATSONVILLE, CITY OF CA4410011	Santa Cruz	PFHxS 6.7PFOA 6.5 PFBS 6.3PFOS 5.1* *	above final limit
WEAVERVILLE C.S.D. CA5310001	Trinity	PFOS 19 PFHxS 5.6*	above final limit
WESTERN MWD - MURRIETA DIVISION CA3310036	Riverside	PFOS 5.7 PFOA 5.5* PFHxS 4.1*	above final limit
WHITTIER-CITY, WATER DEPT. CA1910173	Los Angeles	PFOS 19 PFBA 13PFOA 7.5* PFBS 5.5*	above final limit
YOSEMITE SPRING PARK UTIL CO CA2010005	Madera	PFHxS 13.8PFBS 13.1PFOS 7.9 PFOA 7.5* *	above final limit
YUCAIPA VALLEY WATER DISTRICT CA3610055	San Bernardino	PFBS 10PFPeA 8.9PFHxA 7.1PFOA 4.2 *	above final limit
AMERICAN VALLEY CSD CA3210004	Plumas	PFPeA 4.4	detected
BANNING, CITY OF CA3310006	Riverside	PFBA 8	detected
BASS LAKE WATER COMPANY CA2010003	Madera	PFBA 7.5	detected
BURBANK-CITY, WATER DEPT. CA1910179	Los Angeles	PFPeA 10.2PFBA 8.1PFHxA 4.4	detected
CAL-WATER SERVICE CO.-OROVILLE CA0410005	Butte	PFBA 5.7	detected
CAL/AM WATER COMPANY - SAN MARINO CA1910139	Los Angeles	PFBA 5.3	detected
CALAM - LINCOLN OAKS CA3410013	Sacramento	PFHpA 3	detected
CALIF STATE POLYTECHNICAL UNIV - POMONA CA1910022	Los Angeles	PFBS 6.3PFHxS 5.6PFHxA 3.9PFPeA 3.6	detected
CALIFORNIA REHABILITATION CENTER - NORCO CA3310800	Riverside	PFHxS 3.5	detected
CALIFORNIA WATER SERVICE CO. - DOMINGUEZ CA1910033	Los Angeles	PFHxS 3.5	detected
CAMP PENDLETON (NORTH) CA3710700	San Diego	PFBA 6.2	detected
CAMP PENDLETON (SOUTH) CA3710702	San Diego	PFHxS 5.4PFBS 3.2	detected
CARMICHAEL WATER DISTRICT CA3410004	Sacramento	PFHxA 6PFPeA 5.9	detected
CITY OF ALTURAS CA2510001	Modoc	PFHxS 3.5	detected
CITY OF BENICIA CA4810001	Solano	PFBA 6.3PFHxA 3.4PFBS 3.3	detected
CITY OF FOUNTAIN VALLEY CA3010069	Orange	PFHxS 3.5	detected
CITY OF FOWLER CA1010006	Fresno	6:2 FTS 5.3	detected
CITY OF LIVE OAK, CA CA5110001	Sutter	PFPeA 3.4PFHxA 3	detected
CITY OF MORGAN HILL CA4310006	Santa Clara	PFPeA 3.5PFHxA 3.4PFHxS 3.3	detected
CITY OF WINTERS CA5710005	Yolo	PFNA 4.2	detected
CORONA, CITY OF CA3310037	Riverside	PFBA 7.6PFPeA 6.1PFHxA 3.8PFHxS 3.3	detected
CWSC LOS ALTOS SUBURBAN CA4310001	Santa Clara	PFHxS 3.5	detected
EAST BAY MUD CA0110005	Alameda	PFBA 5.2PFHxA 3.5	detected
EL DORADO ID - MAIN CA0910001	El Dorado	PFPeA 3.2	detected
EL TORO WATER DISTRICT CA3010079	Orange	PFBA 6.7	detected
ELK GROVE WATER SERVICE CA3410008	Sacramento	PFPeA 4.6PFHxS 3.8	detected
ELSINORE VALLEY MWD CA3310012	Riverside	PFBA 7	detected
GLEN HELEN WATER SYSTEM CA3600108	San Bernardino	PFHxS 6.2PFPeA 5.6PFHxA 3.5PFBS 3.2	detected
GOLDEN STATE WATER CO - WRIGHTWOOD CA3610047	San Bernardino	PFBS 7.9	detected
GOLDEN STATE WATER COMPANY - LOS OSOS CA4010017	San Luis Obispo	PFHxS 8.8PFHxA 4.3PFPeA 3.4PFBS 3.2	detected
GOLDEN STATE WATER COMPANY - NIPOMO CA4010018	San Luis Obispo	PFPeA 3.2	detected
GOLDEN STATE WC - COWAN HEIGHTS CA3010047	Orange	PFPeA 7PFBA 6.9	detected
GOLETA WATER DISTRICT CA4210004	Santa Barbara	PFPeA 5.9PFHxA 4.5	detected
GSWC - HOLLYDALE CA1910195	Los Angeles	PFBA 5.5	detected
GSWC - NORWALK CA1910098	Los Angeles	PFPeA 15PFHxA 13PFBA 7.3	detected
GSWC-SOUTH SAN GABRIEL CA1910223	Los Angeles	PFBA 5.6	detected
HEALDSBURG, CITY OF CA4910005	Sonoma	PFBS 5.2PFHxS 4.5PFDoA 3.1	detected
HI DESERT WD CA3610073	San Bernardino	PFHxA 3.4PFPeA 3.4PFHxS 3	detected
IRVINE RANCH WATER DISTRICT CA3010092	Orange	PFBA 7.9PFPeA 3.8	detected
KIRKWOOD MEADOWS PUBLIC UTILITY DISTRICT CA0210002	Alpine	PFPeA 4.3	detected
KONOCTI COUNTY WATER DISTRICT CA1710006	Lake	PFBA 8.2PFPeA 3.9	detected
MONTEREY PARK-CITY, WATER DEPT. CA1910092	Los Angeles	PFBA 7.4PFPeA 5	detected
PADRE DAM MWD CA3710037	San Diego	PFBA 5.8	detected
PALMDALE WATER DIST. CA1910102	Los Angeles	PFHxA 6.3PFPeA 4.6PFBS 4.5	detected
PERRIS, CITY OF CA3310029	Riverside	PFPeA 25PFHxA 11PFBA 11	detected
PRESIDIO OF SAN FRANCISCO CA3810700	San Francisco	PFPeA 8.9PFHxA 6.8PFBA 6.2PFBS 4.9	detected
RINCON DEL DIABLO MWD (ID-1) CA3710018	San Diego	PFBA 10	detected
RIO LINDA/ELVERTA COMMUNITY WATER DIST CA3410018	Sacramento	PFHxA 4.8PFHxS 4	detected
RIVERSIDE, CITY OF CA3310031	Riverside	PFPeA 6.7PFHxA 4.1PFOS 4	detected
ROWLAND WATER DISTRICT CA1910194	Los Angeles	PFBA 10	detected
RUBIDOUX COMMUNITY SD CA3310044	Riverside	PFPeA 28PFBA 22PFHxA 8.2	detected
SACRAMENTO SUBURBAN WATER DISTRICT CA3410001	Sacramento	PFPeA 7.1PFHxS 5.8PFHxA 5.7PFBS 4.7	detected
SAN BERNARDINO CITY CA3610039	San Bernardino	PFBS 4.4PFHxA 4PFHxS 4PFPeA 3.4	detected
SAN GABRIEL VALLEY WATER CO.-EL MONTE CA1910039	Los Angeles	PFBA 10PFPeA 5.6	detected
SAN LORENZO VALLEY WATER DIST CA4410014	Santa Cruz	PFBS 3.4	detected
SANTA CLARITA VALLEY W.A.-NEWHALL DIV. CA1910096	Los Angeles	PFHxS 7.8	detected
SANTA FE I.D. CA3710023	San Diego	PFHxA 4.5PFPeA 4.3	detected
SCOTTS VALLEY WATER DISTRICT CA4410013	Santa Cruz	PFPeA 6.5PFHxA 4.5	detected
SEA RANCH WATER COMPANY,THE (PUC) CA4910007	Sonoma	PFHxS 3.3	detected
SERRANO WATER DISTRICT CA3010082	Orange	PFPeA 16.1PFBA 11.1	detected
SHEEP CREEK WATER COMPANY CA3610109	San Bernardino	PFPeA 9.6PFBS 6.7PFHxA 5.9PFHxS 3.2	detected
SO. CAL. EDISON CO.-SANTA CATALINA CA1910006	Los Angeles	PFHpA 7	detected
SOLVANG WATER DIVISION CA4210013	Santa Barbara	PFBS 3.5	detected
SOUTH COAST WATER DISTRICT CA3010042	Orange	PFBA 5.8	detected
SOUTH MESA WC CA3310017	Riverside	PFPeA 8.9PFHxA 6.8PFBS 4.7PFHxS 3.5	detected
SUBURBAN WATER SYSTEMS-SAN JOSE CA1910205	Los Angeles	PFBA 6.2PFBS 3.6PFPeA 3.5PFHxA 3.3	detected
TEMPLETON CSD CA4010019	San Luis Obispo	PFBS 6.8PFHxS 3.2	detected
TUD-WARDS FERRY RANCHES CA5500363	Tuolumne	PFPeA 4.8PFHxA 3.8PFBS 3	detected
UPLAND, CITY OF CA3610050	San Bernardino	PFPeA 5.7PFHxA 5.5PFBS 3	detected
VAUGHN WC INC CA1510029	Kern	PFHxA 3.4PFPeA 3.1	detected
VENTURA WATER DEPARTMENT CA5610017	Ventura	PFBS 3.1PFHxS 3	detected
WESTERN MWD CA3310049	Riverside	PFPeA 4.7PFHxS 3.4PFBS 3	detected
YORBA LINDA WATER DISTRICT CA3010037	Orange	PFBA 20.6PFPeA 5.3	detected

* exceeds the final federal MCL for that compound. Detections of compounds whose limits EPA proposed to rescind in May 2026 are shown for information.

Systems with no PFAS detected

468 tested systems reported no PFAS above the laboratory reporting limits. Each has its own page with its sampling detail.

A detection at the system level does not tell you what reaches one specific tap: levels vary by entry point, treatment train and plumbing. A certified lab test of your own tap settles it. Testing and treatment options