PFAS in California Drinking Water

Systems reaching a study comparison level

19.3%120 of 623 active community water systems with complete monitoring

All 623 systems had complete monitoring. 120 reached at least one study comparison level; 503 did not. “Study comparison level” means the dated EPA technical cutoff used in this January 2026 research release. It does not determine household exposure, health risk, or current legal compliance.

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Compound summary

System counts in California

Each count shows how many included water systems reached the named study level.

Community water systems reaching the dated EPA comparison levels used in the January 2026 research release for California.
Study comparison	Systems reaching level	Water systems included	Percent
PFOA: study level 4.05 ppt (April 2024 EPA level: 4 ppt)	82	623	13.2%
PFOS: study level 4.05 ppt (April 2024 EPA level: 4 ppt)	106	623	17.0%
PFHxS: study level 15 ppt (April 2024 EPA level: 10 ppt)	10	623	1.6%
PFNA: study level 15 ppt (April 2024 EPA level: 10 ppt)	0	623	0.0%
HFPO-DA: study level 15 ppt (April 2024 EPA level: 10 ppt)	0	623	0.0%
Hazard Index: study level 1.5 with at least two detected components (April 2024 EPA level: 1)	10	623	1.6%

System directory

Community water systems with complete monitoring

Each PWSID appears once, preventing double counting across ZIP associations.

Active community water systems with complete UCMR 5 monitoring in California.
Public water system	PWSID	Population served	Primary source	Sampling locations	Study comparison
ADELANTO, CITY OF	CA3610001	39,930	Ground water	2	Reached a study level
ALAMEDA COUNTY WATER DISTRICT	CA0110001	344,000	Surface water	4	Below the study levels
ALCO WATER SERVICE	CA2710001	56,253	Ground water	6	Below the study levels
AMERICAN VALLEY CSD	CA3210004	3,778	Ground water	11	Below the study levels
AMERICAN WATER O&M, LLC - VAFB	CA4210700	14,971	Surface water purchased	2	Below the study levels
ANGELS, CITY OF	CA0510003	3,836	Surface water	1	Below the study levels
ARCATA, CITY OF	CA1210001	20,875	Ground water purchased	1	Below the study levels
ARMONA COMMUNITY SERVICES DIST	CA1610001	4,143	Ground water	1	Below the study levels
ARROWHEAD VILLAS MUTUAL SERVICE COMPANY	CA3610093	2,654	Surface water purchased	2	Below the study levels
ARROYO GRANDE, WATER DEPARTMENT	CA4010001	17,963	Surface water purchased	3	Reached a study level
ARVIN COMMUNITY SERVICES DIST	CA1510001	19,669	Ground water	3	Below the study levels
ATASCADERO MUTUAL WATER CO	CA4010002	30,618	Ground water	4	Reached a study level
ATASCADERO STATE HOSPITAL	CA4010832	4,100	Ground water	1	Reached a study level
AVENAL, CITY OF	CA1610002	13,696	Surface water	2	Below the study levels
AVERYDALE MWC	CA1910023	1,023	Ground water	2	Below the study levels
AWA BUCKHORN PLANT	CA0310012	8,791	Surface water	1	Below the study levels
AWA, IONE	CA0310002	7,227	Surface water	1	Below the study levels
AZUSA LIGHT AND WATER	CA1910007	110,044	Surface water	5	Below the study levels
BAKERSFIELD, CITY OF	CA1510031	160,144	Surface water purchased	42	Reached a study level
BAKMAN WATER COMPANY	CA1010001	17,393	Ground water	7	Below the study levels
BAKMAN WATER-ROLLING HILLS	CA2010009	1,107	Ground water	3	Below the study levels
BANNING, CITY OF	CA3310006	31,680	Ground water	12	Below the study levels
BAR-LEN MWC	CA3600025	126	Ground water	1	Below the study levels
BASS LAKE WATER COMPANY	CA2010003	4,527	Surface water	4	Below the study levels
BEALE AIR FORCE BASE	CA5810700	6,785	Ground water	1	Below the study levels
BEAR VALLEY CSD	CA1510038	5,592	Ground water	6	Below the study levels
BEAUMONT CHERRY VALLEY WD	CA3310002	66,841	Ground water	10	Below the study levels
BELLA VISTA WATER DISTRICT	CA4510014	18,612	Surface water	6	Below the study levels
BELLFLOWER - SOMERSET MWC	CA1910013	46,300	Surface water purchased	6	Reached a study level
BELLFLOWER MUNICIPAL WATER SYSTEM	CA1910018	5,999	Surface water purchased	2	Reached a study level
BEVERLY HILLS-CITY, WATER DEPT.	CA1910156	40,121	Surface water purchased	2	Below the study levels
BIG BEAR CITY CSD	CA3610008	12,738	Ground water	5	Reached a study level
BIG BEAR LAKE DWP - BIG BEAR SYSTEM	CA3610044	26,132	Ground water	22	Below the study levels
BISHOP, CITY OF	CA1410001	3,819	Ground water	2	Below the study levels
BLUE LAKE SPRINGS MUT WTR	CA0510009	4,841	Surface water purchased	2	Below the study levels
BLUE LAKE, CITY OF	CA1210002	1,172	Ground water purchased	1	Below the study levels
BLYTHE - CITY OF	CA3310003	9,798	Ground water	3	Below the study levels
BOLINAS COMMUNITY PUD	CA2110005	2,483	Surface water	1	Below the study levels
BORREGO WD	CA3710036	3,429	Ground water	9	Below the study levels
BRAWLEY, CITY OF	CA1310001	26,862	Surface water purchased	1	Below the study levels
BRENTWOOD	CA0710004	64,513	Surface water purchased	6	Below the study levels
BROOKTRAILS TOWNSHIP CSD	CA2310009	3,632	Surface water	1	Below the study levels
BUELLTON WATER DEPARTMENT	CA4210018	5,161	Surface water purchased	3	Below the study levels
BURBANK-CITY, WATER DEPT.	CA1910179	105,603	Surface water purchased	1	Below the study levels
CAL AM - MEADOWBROOK	CA2410008	5,656	Ground water	3	Reached a study level
CAL AM - OAKHURST	CA2010007	3,693	Ground water	4	Below the study levels
CAL AM WATER COMPANY - MONTEREY	CA2710004	92,450	Groundwater under influence of surface water	12	Reached a study level
CAL AMERICAN WATER CO	CA5610040	66,809	Surface water purchased	1	Below the study levels
CAL-AM WATER COMPANY - DUARTE	CA1910186	24,773	Ground water	8	Below the study levels
CAL-WATER SERVICE CO.-CHICO	CA0410002	114,925	Ground water	37	Reached a study level
CAL-WATER SERVICE CO.-MARYSVILLE	CA5810001	12,419	Ground water	8	Below the study levels
CAL-WATER SERVICE CO.-OROVILLE	CA0410005	11,106	Surface water	2	Below the study levels
CAL/AM WATER COMPANY - BALDWIN HILLS	CA1910052	20,724	Surface water purchased	5	Below the study levels
CAL/AM WATER COMPANY - SAN MARINO	CA1910139	47,995	Surface water purchased	7	Below the study levels
CALAM - ANTELOPE	CA3410031	35,534	Surface water purchased	15	Below the study levels
CALAM - ARDEN	CA3410045	4,191	Surface water purchased	6	Reached a study level
CALAM - LINCOLN OAKS	CA3410013	48,094	Surface water purchased	19	Below the study levels
CALAM - PARKWAY	CA3410017	50,573	Surface water purchased	9	Reached a study level
CALAM - WEST PLACER	CA3110150	8,861	Surface water purchased	1	Below the study levels
CALAVERAS PUD	CA0510002	6,286	Surface water	1	Below the study levels
CALIFORNIA CITY, CITY OF	CA1510032	14,198	Surface water purchased	5	Below the study levels
CALIFORNIA INSTITUTION FOR MEN	CA3610850	10,667	Ground water	1	Below the study levels
CALIFORNIA REHABILITATION CENTER - NORCO	CA3310800	4,300	Surface water purchased	1	Below the study levels
CALIFORNIA STATE FAIR	CA3410026	9,280	Ground water	4	Reached a study level
CALIFORNIA STATE PRISON - SOLANO	CA4810800	5,100	Surface water	2	Below the study levels
CALIFORNIA STATE UNIVERSITY FRESNO	CA1010339	41,000	Ground water	3	Reached a study level
CALIFORNIA WATER SERVICE - BEAR GULCH	CA4110006	61,431	Surface water	1	Below the study levels
CALIFORNIA WATER SERVICE - LIVERMORE	CA0110003	60,414	Surface water purchased	8	Reached a study level
CALIFORNIA WATER SERVICE - SAN CARLOS	CA4110007	35,344	Surface water purchased	1	Below the study levels
CALIFORNIA WATER SERVICE - SAN MATEO	CA4110008	102,348	Surface water purchased	1	Below the study levels
CALIFORNIA WATER SERVICE - STOCKTON	CA3910001	176,266	Surface water purchased	12	Below the study levels
CALIFORNIA WATER SERVICE CO - WESTLAKE	CA5610016	19,533	Surface water purchased	1	Below the study levels
CALIFORNIA WATER SERVICE CO. - DIXON	CA4810002	10,623	Ground water	3	Below the study levels
CALIFORNIA WATER SERVICE CO. - DOMINGUEZ	CA1910033	143,996	Surface water purchased	9	Below the study levels
CALIFORNIA WATER SERVICE CO. - ELA	CA1910036	152,474	Surface water purchased	10	Reached a study level
CALIFORNIA WATER SERVICE CO. - HERM/REDO	CA1910134	96,853	Surface water purchased	3	Below the study levels
CALIFORNIA WATER SERVICE CO. - PALOS VER	CA1910104	71,452	Surface water purchased	1	Below the study levels
CALIFORNIA WATER SERVICE CO.-LANCASTER	CA1910010	1,387	Surface water purchased	2	Below the study levels
CALIFORNIA WATER SERVICE CO.-TRAVIS AFB	CA4810701	18,111	Surface water purchased	1	Below the study levels
CALIFORNIA WATER SERVICE-S SAN FRANCISCO	CA4110009	64,146	Surface water purchased	2	Below the study levels
CALIFORNIA-AMERICAN GEYSERVILLE (PUC)	CA4910024	1,046	Ground water	2	Below the study levels
CALIFORNIA-AMERICAN LARKFIELD (PUC)	CA4910023	7,913	Ground water	2	Below the study levels
CALISTOGA, CITY OF	CA2810002	5,610	Surface water	2	Below the study levels
CAMARILLO WATER DEPT	CA5610019	46,824	Surface water purchased	4	Below the study levels
CAMP PENDLETON (SOUTH)	CA3710702	42,219	Ground water	2	Below the study levels
CAMROSA WATER DISTRICT	CA5610063	32,700	Surface water purchased	5	Reached a study level
CANADA WOODS WC	CA2702588	356	Groundwater under influence of surface water	1	Below the study levels
CARLSBAD MWD	CA3710005	95,158	Surface water purchased	4	Below the study levels
CARMICHAEL WATER DISTRICT	CA3410004	41,193	Groundwater under influence of surface water	6	Below the study levels
CARPINTERIA VALLEY WATER DISTRICT	CA4210001	15,996	Surface water purchased	4	Below the study levels
CASITAS MUNICIPAL WATER DIST	CA5610024	11,005	Surface water	2	Below the study levels
CASTROVILLE COMMUNITY SERVICES DISTRICT	CA2710005	7,515	Ground water	2	Below the study levels
CCI - TEHACHAPI	CA1510800	2,993	Ground water	1	Below the study levels
CCWD - COPPER COVE	CA0510017	5,187	Surface water	1	Below the study levels
CCWD - JENNY LIND	CA0510006	9,861	Surface water	1	Below the study levels
CDCR-HIGH DESERT STATE PRISON	CA1805004	3,857	Ground water	2	Below the study levels
CENTERVILLE C.S.D.	CA4510011	4,151	Surface water purchased	1	Below the study levels
CENTINELA STATE PRISON	CA1310801	4,100	Surface water purchased	1	Below the study levels
CERES, CITY OF	CA5010028	54,513	Surface water purchased	8	Reached a study level
CERRITOS - CITY, WATER DEPT.	CA1910019	47,475	Surface water purchased	4	Below the study levels
CHANNEL ISLANDS BEACH CSD	CA5610039	4,560	Surface water purchased	1	Below the study levels
CHINA LAKE NAVAL AIR WEAPONS STATION	CA1510703	6,600	Ground water	6	Below the study levels
CHINO HILLS, CITY OF	CA3610036	76,414	Surface water purchased	2	Below the study levels
CHINO, CITY OF	CA3610012	86,435	Surface water purchased	8	Below the study levels
CHOWCHILLA CITY WATER DEPT	CA2010001	13,916	Ground water	6	Below the study levels
CHUCKAWALLA VALLEY STATE PRISON	CA3310802	4,090	Ground water	1	Below the study levels
CITRUS HEIGHTS WATER DISTRICT	CA3410006	67,818	Surface water purchased	5	Below the study levels
CITY OF ALHAMBRA	CA1910001	79,776	Surface water purchased	4	Below the study levels
CITY OF ALTURAS	CA2510001	2,715	Ground water	4	Below the study levels
CITY OF ANAHEIM	CA3010001	348,593	Surface water	17	Reached a study level
CITY OF ANTIOCH	CA0710001	115,074	Surface water	1	Below the study levels
CITY OF ARCADIA	CA1910003	51,361	Ground water	9	Reached a study level
CITY OF ATWATER	CA2410001	29,479	Ground water	8	Reached a study level
CITY OF BELL GARDENS	CA1910108	11,437	Surface water purchased	2	Reached a study level
CITY OF BENICIA	CA4810001	27,131	Surface water	1	Below the study levels
CITY OF BREA	CA3010002	48,479	Surface water purchased	3	Below the study levels
CITY OF BUENA PARK	CA3010003	81,998	Surface water purchased	9	Reached a study level
CITY OF CLOVIS	CA1010003	130,130	Surface water	38	Reached a study level
CITY OF COLUSA	CA0610002	6,447	Ground water	5	Below the study levels
CITY OF CORNING	CA5210001	8,244	Ground water	7	Below the study levels
CITY OF CRESCENT CITY	CA0810001	17,262	Ground water	1	Below the study levels
CITY OF CUPERTINO	CA4310018	16,336	Surface water purchased	2	Below the study levels
CITY OF DALY CITY	CA4110013	104,901	Surface water purchased	5	Below the study levels
CITY OF DAVIS	CA5710001	67,457	Surface water purchased	8	Below the study levels
CITY OF DIXON	CA4810009	12,540	Ground water	4	Below the study levels
CITY OF DOS PALOS	CA2410002	7,452	Surface water	1	Below the study levels
CITY OF FAIRFIELD	CA4810003	120,377	Surface water	2	Below the study levels
CITY OF FOUNTAIN VALLEY	CA3010069	56,747	Surface water purchased	7	Below the study levels
CITY OF FOWLER	CA1010006	7,448	Ground water	6	Below the study levels
CITY OF FRESNO	CA1010007	545,716	Surface water	174	Reached a study level
CITY OF FULLERTON	CA3010010	139,461	Surface water purchased	7	Reached a study level
CITY OF GARDEN GROVE	CA3010062	174,226	Surface water purchased	11	Reached a study level
CITY OF GILROY	CA4310004	59,203	Ground water	7	Reached a study level
CITY OF GRIDLEY	CA0410004	7,269	Ground water	5	Reached a study level
CITY OF GUSTINE	CA2410003	6,110	Ground water	4	Below the study levels
CITY OF HUNTINGTON BEACH	CA3010053	201,000	Surface water purchased	10	Reached a study level
CITY OF INDUSTRY WATERWORKS SYSTEMS	CA1910029	6,158	Ground water	1	Below the study levels
CITY OF JACKSON	CA0310001	5,019	Surface water purchased	1	Below the study levels
CITY OF LA HABRA	CA3010018	63,118	Surface water purchased	3	Below the study levels
CITY OF LA PALMA	CA3010100	15,948	Surface water purchased	3	Below the study levels
CITY OF LATHROP	CA3910015	35,080	Surface water purchased	2	Reached a study level
CITY OF LINCOLN	CA3110004	54,538	Surface water purchased	3	Below the study levels
CITY OF LIVE OAK, CA	CA5110001	9,285	Ground water	4	Below the study levels
CITY OF LIVERMORE	CA0110011	38,892	Surface water purchased	1	Below the study levels
CITY OF LIVINGSTON	CA2410004	14,894	Ground water	8	Below the study levels
CITY OF LOS BANOS	CA2410005	47,419	Ground water	13	Below the study levels
CITY OF MADERA	CA2010002	66,560	Ground water	9	Below the study levels
CITY OF MARTINEZ	CA0710006	30,997	Surface water purchased	1	Below the study levels
CITY OF MERCED	CA2410009	93,692	Ground water	21	Reached a study level
CITY OF MILLBRAE	CA4110018	22,795	Surface water purchased	1	Below the study levels
CITY OF MILPITAS	CA4310005	81,773	Surface water purchased	2	Below the study levels
CITY OF MODESTO - SALIDA	CA5010005	14,537	Surface water purchased	2	Below the study levels
CITY OF MORGAN HILL	CA4310006	47,374	Ground water	16	Below the study levels
CITY OF MOUNTAIN VIEW	CA4310007	81,501	Surface water purchased	6	Below the study levels
CITY OF NEWMAN-WATER DEPARTMENT	CA5010013	12,207	Ground water	5	Below the study levels
CITY OF NEWPORT BEACH	CA3010023	68,572	Surface water purchased	2	Below the study levels
CITY OF ORANGE	CA3010027	120,770	Surface water purchased	11	Reached a study level
CITY OF ORANGE COVE	CA1010023	9,525	Surface water	1	Below the study levels
CITY OF ORLAND	CA1110001	8,298	Ground water	7	Below the study levels
CITY OF PALO ALTO	CA4310009	67,231	Surface water purchased	1	Below the study levels
CITY OF PARLIER	CA1010025	14,576	Ground water	4	Below the study levels
CITY OF PITTSBURG	CA0710008	62,500	Surface water purchased	1	Below the study levels
CITY OF PLEASANTON	CA0110008	76,689	Surface water purchased	3	Reached a study level
CITY OF RED BLUFF	CA5210004	14,710	Ground water	11	Below the study levels
CITY OF REDDING	CA4510005	89,628	Surface water	11	Reached a study level
CITY OF RIO VISTA	CA4810004	10,489	Ground water	7	Below the study levels
CITY OF ROSEVILLE	CA3110008	155,612	Surface water	8	Below the study levels
CITY OF SACRAMENTO MAIN	CA3410020	527,979	Surface water	13	Reached a study level
CITY OF SAN BRUNO	CA4110023	42,631	Surface water purchased	5	Below the study levels
CITY OF SAN CLEMENTE	CA3010036	51,545	Surface water purchased	2	Below the study levels
CITY OF SAN JOSE - EVG/EDV/COY	CA4310020	101,265	Surface water purchased	4	Below the study levels
CITY OF SAN JOSE - NSJ/ALVISO	CA4310019	45,559	Surface water purchased	3	Below the study levels
CITY OF SAN JUAN CAPISTRANO	CA3010030	39,684	Surface water purchased	3	Below the study levels
CITY OF SANGER	CA1010029	26,357	Ground water	10	Reached a study level
CITY OF SANTA ANA	CA3010038	310,539	Surface water purchased	12	Reached a study level
CITY OF SANTA BARBARA WATER DEPARTMENT	CA4210010	99,323	Surface water	2	Below the study levels
CITY OF SANTA CLARA	CA4310012	130,746	Surface water purchased	20	Below the study levels
CITY OF SEAL BEACH	CA3010041	24,937	Surface water purchased	4	Below the study levels
CITY OF SHASTA LAKE	CA4510006	10,657	Surface water	1	Below the study levels
CITY OF SOUTH PASADENA	CA1910154	25,329	Surface water purchased	2	Below the study levels
CITY OF STOCKTON	CA3910012	191,302	Surface water	17	Below the study levels
CITY OF SUNNYVALE	CA4310014	157,566	Surface water purchased	8	Below the study levels
CITY OF SUSANVILLE	CA1810001	7,811	Ground water	5	Below the study levels
CITY OF TUSTIN	CA3010046	66,600	Surface water purchased	5	Below the study levels
CITY OF VACAVILLE	CA4810008	99,650	Surface water	9	Reached a study level
CITY OF VALLEJO	CA4810007	121,420	Surface water	1	Below the study levels
CITY OF VALLEJO-LAKES SYSTEM	CA4810021	2,800	Surface water	1	Below the study levels
CITY OF WATERFORD	CA5010006	8,788	Ground water	4	Below the study levels
CITY OF WESTMINSTER	CA3010064	90,911	Surface water purchased	10	Reached a study level
CITY OF WHEATLAND	CA5810004	4,124	Ground water	6	Reached a study level
CITY OF WILLIAMS	CA0610004	5,538	Ground water	2	Below the study levels
CITY OF WINTERS	CA5710005	7,115	Ground water	5	Below the study levels
CITY OF WOODLAND	CA5710006	61,462	Surface water purchased	8	Below the study levels
CLEAR CREEK CSD-ANDERSON	CA4510016	8,900	Surface water	4	Below the study levels
CLOVERDALE, CITY OF	CA4910002	10,398	Groundwater under influence of surface water	1	Below the study levels
COACHELLA VWD: COVE COMMUNITY	CA3310001	270,000	Ground water	20	Below the study levels
COACHELLA VWD: I.D. NO. 8	CA3310048	4,600	Ground water	4	Below the study levels
COACHELLA WATER AUTHORITY	CA3310007	43,590	Ground water	6	Below the study levels
COALINGA-CITY	CA1010004	17,277	Surface water	1	Below the study levels
COASTSIDE COUNTY WATER DISTRICT	CA4110011	18,940	Surface water	2	Below the study levels
COLTON, CITY OF	CA3610014	46,525	Ground water	8	Reached a study level
COMMERCE-CITY, WATER DEPT.	CA1910050	4,205	Surface water purchased	3	Reached a study level
COMPTON-CITY, WATER DEPT.	CA1910026	74,877	Surface water purchased	6	Reached a study level
CONTRA COSTA WATER DISTRICT	CA0710003	198,000	Surface water	3	Below the study levels
CORCORAN, CITY OF	CA1610004	22,808	Ground water	1	Below the study levels
CORONA, CITY OF	CA3310037	168,575	Surface water purchased	15	Below the study levels
CORRECTIONAL TRAINING FACILITY - SOLEDAD	CA2710850	4,269	Ground water	1	Below the study levels
COTATI, CITY OF	CA4910016	7,303	Ground water	5	Below the study levels
COTTONWOOD COUNTY WATER DIST.	CA4510007	3,316	Ground water	5	Below the study levels
CRESCENTA VALLEY CWD	CA1910028	35,841	Surface water purchased	7	Reached a study level
CRESTLINE VILLAGE CWD - DIVISION 10	CA3610015	11,650	Surface water purchased	16	Reached a study level
CUCAMONGA VALLEY WATER DISTRICT	CA3610018	211,069	Surface water	8	Below the study levels
CUTLER PUD	CA5410001	6,200	Ground water	2	Below the study levels
CWS - BAKERSFIELD	CA1510003	267,881	Surface water	46	Reached a study level
CWS - NORTH GARDEN	CA1510055	22,762	Surface water	9	Below the study levels
CWS - SELMA	CA1010024	26,517	Ground water	8	Below the study levels
CWS - VISALIA	CA5410016	148,496	Ground water	43	Reached a study level
CWSC KING CITY	CA2710009	16,334	Ground water	6	Below the study levels
CWSC LAS LOMAS	CA2710013	2,084	Ground water	2	Below the study levels
CWSC LOS ALTOS SUBURBAN	CA4310001	69,973	Surface water purchased	16	Below the study levels
CWSC OAK HILLS	CA2710019	3,161	Ground water	2	Below the study levels
CWSC SALINAS	CA2710010	123,679	Ground water	20	Below the study levels
CWSC SALINAS HILLS	CA2710012	5,293	Ground water	6	Below the study levels
Cache Creek Casino Resort	090605107	12,800	Ground water	2	Below the study levels
Cal Am - Fruitridge Vista	CA3410023	15,652	Surface water purchased	9	Below the study levels
Cal Am - Suburban Rosemont	CA3410010	54,793	Surface water purchased	20	Reached a study level
Colusa Southern System	090605047	3,474	Ground water	2	Below the study levels
DEL MAR, CITY OF	CA3710004	3,919	Surface water purchased	1	Below the study levels
DEL PASO MANOR COUNTY WATER DI	CA3410007	4,854	Ground water	4	Below the study levels
DELANO, CITY OF	CA1510005	51,428	Ground water	12	Below the study levels
DENAIR COMMUNITY SERVICES DISTRICT	CA5010021	5,090	Ground water	4	Below the study levels
DESERT WATER AGENCY	CA3310005	74,807	Surface water	9	Below the study levels
DINUBA, CITY OF	CA5410002	27,281	Ground water	7	Below the study levels
DOWNEY - CITY, WATER DEPT.	CA1910034	110,556	Ground water	5	Reached a study level
DUBLIN SAN RAMON SERVICES DISTRICT	CA0110009	98,776	Surface water purchased	1	Below the study levels
EARLIMART PUD	CA5410021	7,679	Ground water	4	Below the study levels
EAST BAY MUD	CA0110005	1,442,800	Surface water	6	Below the study levels
EAST NILES CSD	CA1510006	32,517	Surface water purchased	3	Below the study levels
EAST PASADENA WATER CO.	CA1910020	9,949	Ground water	2	Below the study levels
EAST VALLEY WATER DISTRICT	CA3610064	108,629	Surface water	13	Reached a study level
EASTERN MUNICIPAL WD	CA3310009	666,581	Surface water purchased	14	Below the study levels
EDWARDS AFB - MAIN BASE	CA1510701	11,316	Surface water purchased	2	Below the study levels
EL DORADO ID - MAIN	CA0910001	132,171	Surface water	3	Below the study levels
EL MONTE-CITY, WATER DEPT.	CA1910038	22,968	Ground water	4	Below the study levels
EL TORO WATER DISTRICT	CA3010079	51,800	Surface water purchased	4	Below the study levels
ELK GROVE WATER SERVICE	CA3410008	43,813	Surface water purchased	5	Below the study levels
ELSINORE VALLEY MWD	CA3310012	169,455	Surface water	8	Below the study levels
ESCALON, CITY OF	CA3910003	7,429	Ground water	3	Below the study levels
ESTERO MUNICIPAL IMPROVEMENT DISTRICT	CA4110021	36,556	Surface water purchased	1	Below the study levels
EUREKA, CITY OF	CA1210004	27,078	Ground water purchased	1	Below the study levels
FAIR OAKS WATER DISTRICT	CA3410009	36,226	Surface water purchased	5	Below the study levels
FALLBROOK PUD	CA3710008	35,237	Surface water purchased	3	Below the study levels
FARM MUTUAL W.C. (THE)	CA3310046	4,026	Surface water purchased	1	Below the study levels
FARMERSVILLE, CITY OF	CA5410004	10,243	Ground water	4	Below the study levels
FILLMORE WATER DEPT	CA5610002	16,419	Ground water	2	Below the study levels
FIREBAUGH CITY	CA1010005	8,096	Ground water	2	Below the study levels
FLORIN COUNTY WATER DISTRICT	CA3410033	7,831	Ground water	10	Reached a study level
FOLSOM, CITY OF - ASHLAND	CA3410030	3,317	Surface water purchased	1	Below the study levels
FOLSOM, CITY OF - MAIN	CA3410014	80,969	Surface water	1	Below the study levels
FORESTHILL PUBLIC UTILITY DIST	CA3110003	6,782	Surface water	1	Below the study levels
FORT BRAGG, CITY OF	CA2310001	6,919	Surface water	1	Below the study levels
FORTUNA, CITY OF	CA1210006	12,133	Ground water	1	Below the study levels
GEORGETOWN DIVIDE PUD	CA0910013	9,434	Surface water	2	Below the study levels
GLEN HELEN WATER SYSTEM	CA3600108	5,900	Ground water	5	Below the study levels
GLENDALE-CITY, WATER DEPT.	CA1910043	188,784	Surface water purchased	5	Reached a study level
GLENDORA-CITY, WATER DEPT.	CA1910044	49,934	Surface water purchased	3	Below the study levels
GOLDEN HILLS CSD	CA1510045	9,857	Ground water	8	Reached a study level
GOLDEN STATE WATER CO - APPLE VLY SOUTH	CA3610107	6,208	Ground water	3	Below the study levels
GOLDEN STATE WATER CO - ARDEN WATER SERV	CA3410003	5,658	Ground water	6	Below the study levels
GOLDEN STATE WATER CO - BARSTOW	CA3610043	32,547	Ground water	4	Below the study levels
GOLDEN STATE WATER CO - WRIGHTWOOD	CA3610047	4,177	Ground water	8	Below the study levels
GOLDEN STATE WATER CO. - CORDOVA	CA3410015	47,161	Surface water	8	Below the study levels
GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM	CA1710002	4,644	Surface water	1	Below the study levels
GOLDEN STATE WATER COMPANY - BAY POINT	CA0710002	23,731	Surface water purchased	1	Below the study levels
GOLDEN STATE WATER COMPANY - LOS OSOS	CA4010017	5,924	Ground water	4	Below the study levels
GOLDEN STATE WATER COMPANY - NIPOMO	CA4010018	4,506	Surface water purchased	3	Below the study levels
GOLDEN STATE WATER COMPANY - SIMI VALLEY	CA5610059	45,128	Surface water purchased	2	Below the study levels
GOLDEN STATE WC - COWAN HEIGHTS	CA3010047	6,997	Surface water purchased	2	Below the study levels
GOLDEN STATE WC - PLACENTIA/YORBA LINDA	CA3010035	50,381	Surface water purchased	4	Reached a study level
GOLDEN STATE WC - WEST ORANGE COUNTY	CA3010022	114,379	Surface water purchased	12	Reached a study level
GOLETA WATER DISTRICT	CA4210004	84,462	Surface water	10	Below the study levels
GONZALES, CITY OF	CA2710007	8,327	Ground water	4	Below the study levels
GREAT OAKS WC INC	CA4310022	110,088	Ground water	19	Below the study levels
GREENFIELD COUNTY WD	CA1510024	11,590	Ground water	6	Below the study levels
GREENFIELD, CITY OF	CA2710008	18,967	Ground water	2	Below the study levels
GROVELAND COMMUNITY SERV DIST	CA5510009	3,400	Surface water	3	Below the study levels
GSWC - ARTESIA	CA1910004	50,415	Ground water	5	Reached a study level
GSWC - BELL, BELL GARDENS	CA1910011	55,050	Surface water purchased	5	Reached a study level
GSWC - CLAREMONT	CA1910024	39,730	Surface water purchased	11	Reached a study level
GSWC - CULVER CITY	CA1910030	38,233	Surface water purchased	1	Below the study levels
GSWC - FLORENCE/GRAHAM	CA1910077	63,472	Surface water purchased	3	Below the study levels
GSWC - HOLLYDALE	CA1910195	8,099	Ground water	2	Below the study levels
GSWC - NORWALK	CA1910098	43,167	Surface water purchased	6	Below the study levels
GSWC - SOUTHWEST	CA1910155	277,740	Surface water purchased	8	Below the study levels
GSWC - Willowbrook	CA1910072	10,793	Surface water purchased	2	Below the study levels
GSWC-CALIPATRIA	CA1310003	7,363	Surface water purchased	1	Below the study levels
GSWC-SOUTH ARCADIA	CA1910212	27,072	Ground water	5	Reached a study level
GSWC-SOUTH SAN GABRIEL	CA1910223	26,240	Surface water purchased	3	Below the study levels
GUADALUPE VALLEY MID	CA4110005	1,472	Surface water purchased	1	Below the study levels
Golden State Water Co. - Orcutt	CA4210016	34,102	Surface water purchased	12	Below the study levels
HAWTHORNE-CITY WATER DEPT.	CA1910047	44,718	Surface water purchased	2	Below the study levels
HEALDSBURG, CITY OF	CA4910005	10,985	Groundwater under influence of surface water	3	Below the study levels
HEBER PUBLIC UTILITY DISTRICT	CA1310007	6,979	Surface water purchased	1	Below the study levels
HELENDALE COMMUNITY SERVICE DISTRICT	CA3610112	6,347	Ground water	2	Reached a study level
HELIX WATER DISTRICT	CA3710010	277,668	Surface water	1	Below the study levels
HEMET, CITY OF	CA3310016	33,828	Surface water purchased	3	Below the study levels
HERITAGE RANCH CSD	CA4010012	2,956	Surface water	1	Below the study levels
HESPERIA WD	CA3610024	100,744	Ground water	15	Reached a study level
HI DESERT WD	CA3610073	26,411	Ground water	7	Below the study levels
HIDDEN VALLEY LAKE CSD	CA1710015	6,235	Ground water	1	Below the study levels
HIGHLANDS MUTUAL WATER COMPANY	CA1710003	7,772	Surface water	1	Below the study levels
HOLLISTER, CITY OF	CA3510001	26,017	Surface water purchased	6	Below the study levels
HOLTVILLE, CITY OF	CA1310005	6,355	Surface water purchased	1	Below the study levels
HUGHSON, CITY OF	CA5010008	7,481	Ground water	3	Below the study levels
HUMBOLDT C.S.D.	CA1210009	19,807	Ground water	4	Below the study levels
HUNTINGTON PARK-CITY, WATER DEPT.	CA1910049	15,437	Surface water purchased	6	Reached a study level
HURON, CITY OF	CA1010044	9,306	Surface water	1	Below the study levels
Hoopa Valley-Wide System	090605126	3,500	Surface water	1	Below the study levels
INDIAN WELLS VALLEY W.D.	CA1510017	41,580	Ground water	8	Below the study levels
INDIO WATER AUTHORITY	CA3310020	84,757	Ground water	13	Below the study levels
INGLEWOOD- CITY, WATER DEPT.	CA1910051	80,824	Surface water purchased	2	Below the study levels
IRVINE RANCH WATER DISTRICT	CA3010092	444,800	Surface water	8	Below the study levels
IVANHOE PUBLIC UTILITY DIST	CA5410019	4,580	Ground water	4	Below the study levels
JACKSON VALLEY IRRIGATION DISTRICT	CA0300037	3,553	Surface water	1	Below the study levels
JOSHUA BASIN WATER DISTRICT	CA3610025	6,640	Ground water	5	Below the study levels
JURUPA COMMUNITY SD	CA3310021	135,093	Surface water purchased	8	Below the study levels
KELSEYVILLE CO WATERWORKS DISTRICT 3	CA1710007	4,102	Ground water	4	Below the study levels
KERMAN, CITY OF	CA1010018	17,256	Ground water	5	Below the study levels
KERN VALLEY STATE PRISON	CA1510802	5,000	Ground water	1	Below the study levels
KEYES COMMUNITY SERVICES DIST.	CA5010009	5,672	Ground water	1	Below the study levels
KINGSBURG, CITY OF	CA1010019	13,540	Ground water	7	Below the study levels
KONOCTI COUNTY WATER DISTRICT	CA1710006	5,928	Surface water	1	Below the study levels
LA CANADA IRRIGATION DIST.	CA1910054	9,300	Surface water purchased	1	Below the study levels
LA CUMBRE MUTUAL WATER CO	CA4210024	4,861	Surface water purchased	3	Below the study levels
LA HABRA HEIGHTS CWD	CA1910218	5,325	Surface water purchased	2	Reached a study level
LA PUENTE VALLEY CWD	CA1910060	8,243	Ground water	1	Below the study levels
LA VERNE, CITY WD	CA1910062	31,334	Surface water purchased	4	Below the study levels
LAGUNA BEACH COUNTY WD	CA3010017	18,404	Surface water purchased	2	Below the study levels
LAKE ALMANOR COUNTRY CLUB MWC	CA3210006	6,000	Ground water	5	Below the study levels
LAKE ARROWHEAD CSD	CA3610005	7,038	Surface water	2	Reached a study level
LAKE HEMET MWD	CA3310022	52,913	Ground water	10	Below the study levels
LAKEPORT, CITY OF	CA1710004	4,762	Surface water	2	Below the study levels
LAKESIDE WD	CA3710013	35,500	Surface water purchased	2	Below the study levels
LAKESIDE WOODS MUTUAL WATER CO	CA4500013	310	Ground water	1	Below the study levels
LAMONT PUBLIC UTILITY DIST	CA1510012	19,057	Ground water	6	Below the study levels
LAS FLORES WATER CO.	CA1910061	4,847	Surface water purchased	1	Below the study levels
LAS VIRGENES MWD	CA1910225	72,602	Surface water	4	Below the study levels
LATON COMMUNITY SERVICES DISTRICT	CA1010020	1,151	Ground water	3	Below the study levels
LEMOORE NAVAL AIR STATION	CA1610700	15,000	Surface water	1	Below the study levels
LEMOORE, CITY OF	CA1610005	27,185	Ground water	4	Below the study levels
LIBERTY UTILITIES (AV RANCHOS) CORP.	CA3610003	64,469	Ground water	10	Below the study levels
LIBERTY UTILITIES - BELLFLOWER-NORWALK	CA1910211	72,624	Surface water purchased	7	Reached a study level
LIBERTY UTILITIES - COMPTON	CA1910021	26,371	Surface water purchased	4	Below the study levels
LIBERTY UTILITIES - LYNWOOD	CA1910161	24,701	Surface water purchased	3	Reached a study level
LINDA COUNTY WATER DISTRICT	CA5810002	21,654	Ground water	4	Below the study levels
LITTLEROCK CREEK IRRIGATION DIST.	CA1910064	3,040	Ground water	5	Below the study levels
LODI, CITY OF	CA3910004	68,272	Surface water	25	Reached a study level
LOMA LINDA UNIVERSITY	CA3600152	15,368	Ground water	3	Below the study levels
LOMA LINDA, CITY OF	CA3610013	25,129	Ground water	5	Below the study levels
LOMPOC-CITY WATER UTILITY DIV	CA4210006	40,473	Surface water	2	Below the study levels
LONG BEACH-CITY, WATER DEPT.	CA1910065	466,772	Surface water purchased	2	Below the study levels
LOS ANGELES CWWD 36-VAL VERDE	CA1910185	6,376	Surface water purchased	1	Below the study levels
LOS ANGELES CWWD 37-ACTON	CA1910248	4,805	Surface water purchased	1	Below the study levels
LOS ANGELES CWWD 40, REG. 38-LAKE LA	CA1910005	12,568	Surface water purchased	2	Below the study levels
LOS ANGELES CWWD 40,REG 4 & 34-LANCASTER	CA1910070	208,129	Surface water purchased	10	Below the study levels
LOS ANGELES-CITY, DEPT. OF WATER & POWER	CA1910067	3,875,566	Surface water	4	Below the study levels
LOS OSOS COMMUNITY SERVICES DISTRICT	CA4010016	7,086	Ground water	7	Reached a study level
LUCERNE WATER CO. - CAL WATER SERVICE	CA1710005	2,129	Surface water	1	Below the study levels
LYNWOOD-CITY, WATER DEPT.	CA1910079	66,967	Surface water purchased	6	Reached a study level
MADERA VALLEY WATER COMPANY	CA2010010	6,494	Ground water	5	Below the study levels
MALAGA COUNTY WATER DISTRICT	CA1010042	5,979	Ground water	3	Below the study levels
MAMMOTH CWD	CA2610001	8,234	Surface water	4	Below the study levels
MANHATTAN BEACH-CITY, WATER DEPT.	CA1910083	32,697	Surface water purchased	2	Below the study levels
MANTECA, CITY OF	CA3910005	84,928	Surface water purchased	11	Reached a study level
MARIN MUNICIPAL WATER DISTRICT	CA2110002	186,895	Surface water	3	Below the study levels
MARINA COAST WATER DISTRICT	CA2710017	38,377	Ground water	3	Below the study levels
MAYWOOD MUTUAL WATER CO. #1	CA1910084	5,500	Surface water purchased	2	Reached a study level
MAYWOOD MUTUAL WATER CO. #2	CA1910085	6,349	Surface water purchased	2	Below the study levels
MAYWOOD MUTUAL WATER CO. #3	CA1910086	6,059	Surface water purchased	3	Reached a study level
MCFARLAND, CITY OF	CA1510013	14,161	Ground water	3	Below the study levels
MCKINLEYVILLE C.S.D.	CA1210016	16,900	Ground water purchased	1	Below the study levels
MEINERS OAKS CWD	CA5610005	4,200	Surface water purchased	4	Below the study levels
MENDOTA, CITY OF	CA1010021	11,404	Ground water	1	Below the study levels
MENLO PARK MUNICIPAL WATER	CA4110017	22,362	Surface water purchased	1	Below the study levels
MESA WATER DISTRICT	CA3010004	110,000	Surface water purchased	9	Below the study levels
MID-PENINSULA WATER DISTRICT	CA4110001	30,609	Surface water purchased	1	Below the study levels
MILLVIEW COUNTY WATER DISTRICT	CA2310006	5,500	Surface water	3	Below the study levels
MISSION HILLS CSD	CA4210019	3,600	Ground water	1	Below the study levels
MISSION SPRINGS WD	CA3310008	43,484	Ground water	7	Below the study levels
MODESTO, CITY OF	CA5010010	218,771	Surface water purchased	42	Reached a study level
MOJAVE PUD	CA1510014	4,699	Surface water purchased	5	Below the study levels
MONROVIA-CITY, WATER DEPT.	CA1910090	37,931	Ground water	1	Reached a study level
MONTARA WATER AND SANITARY DISTRICT	CA4110010	6,078	Surface water	3	Below the study levels
MONTE VISTA CWD	CA3610029	56,017	Surface water purchased	9	Reached a study level
MONTEBELLO LAND & WATER CO.	CA1910091	26,554	Ground water	3	Reached a study level
MONTEBELLO-CITY, WATER DEPT.	CA1910117	7,330	Surface water purchased	2	Below the study levels
MONTECITO WATER DIST	CA4210007	11,962	Surface water	7	Below the study levels
MONTEREY PARK-CITY, WATER DEPT.	CA1910092	62,183	Ground water	1	Below the study levels
MORRO BAY PW DEPT - WATER DIVISION	CA4010011	13,757	Surface water purchased	1	Below the study levels
MOULTON NIGUEL WATER DISTRICT	CA3010073	170,236	Surface water purchased	2	Below the study levels
MOUNTAIN HOUSE COMMUNITY SERVICES DIST.	CA3910027	24,948	Surface water	1	Below the study levels
MT. KONOCTI MUTUAL WATER COMPANY	CA1710014	4,360	Surface water	1	Below the study levels
MT. SHASTA, CITY OF	CA4710008	3,642	Ground water	3	Below the study levels
MUSCOY MWC NO. 1	CA3610031	13,000	Ground water	1	Below the study levels
MYOMA DUNES MUTUAL WATER COMPANY	CA3310051	9,445	Ground water	5	Below the study levels
Morongo	090600142	16,000	Ground water	5	Below the study levels
NEEDLES, CITY OF	CA3610032	8,766	Ground water	3	Below the study levels
NEVADA ID - LAKE OF PINES	CA2910014	6,870	Surface water	1	Below the study levels
NEVADA ID - LAKE WILDWOOD	CA2910023	9,108	Surface water	1	Below the study levels
NEVADA ID - NORTH AUBURN	CA3110026	6,870	Surface water	1	Below the study levels
NIPOMO COMM SERVICES DIST	CA4010026	13,771	Surface water purchased	5	Below the study levels
NORCO, CITY OF	CA3310025	25,068	Surface water purchased	6	Reached a study level
NORTH COAST COUNTY WATER DIST	CA4110025	38,546	Surface water purchased	1	Below the study levels
NORTH MARIN WATER DISTRICT	CA2110003	61,691	Surface water	2	Below the study levels
NORTH TAHOE PUD - MAIN	CA3110001	6,321	Surface water	2	Below the study levels
NORTHSTAR C.S.D.	CA3110028	15,452	Surface water	1	Below the study levels
NORWALK - CITY, WATER DEPT.	CA1910191	20,283	Surface water purchased	6	Reached a study level
NPS GGNRA	CA2110350	18,447	Surface water purchased	1	Below the study levels
NUEVO WATER COMPANY	CA3310026	6,733	Surface water purchased	1	Reached a study level
OAK PARK WATER SERVICE	CA5610043	13,898	Surface water purchased	1	Below the study levels
OAKDALE, CITY OF	CA5010014	23,235	Ground water	7	Below the study levels
OCEANO COMM SERVICES DIST.	CA4010005	7,601	Surface water purchased	3	Below the study levels
OCEANSIDE, CITY OF	CA3710014	171,483	Surface water purchased	2	Below the study levels
OILDALE MWC	CA1510015	44,899	Surface water purchased	3	Below the study levels
OLIVEHURST PUBLIC U.D.	CA5810003	16,595	Ground water	3	Below the study levels
OLIVENHAIN MWD	CA3710029	86,458	Surface water purchased	1	Below the study levels
OLYMPIA MOBILODGE	CA3410022	450	Ground water	1	Below the study levels
ONTARIO MUNICIPAL UTILITIES COMPANY	CA3610034	185,010	Surface water purchased	17	Reached a study level
ORANGE VALE WATER COMPANY	CA3410016	16,861	Surface water purchased	1	Below the study levels
ORCHARD DALE WATER DISTRICT	CA1910101	25,000	Ground water purchased	1	Reached a study level
OROSI PUBLIC UTILITY DISTRICT	CA5410008	8,300	Ground water	4	Below the study levels
OTAY WATER DISTRICT	CA3710034	238,008	Surface water purchased	2	Below the study levels
OXNARD WATER DEPT	CA5610007	200,232	Surface water purchased	3	Below the study levels
PADRE DAM MWD	CA3710037	93,980	Surface water purchased	2	Below the study levels
PAJARO COMMUNITY SERVICES DISTRICT	CA2710020	6,500	Ground water	1	Below the study levels
PALM RANCH IRRIGATION DIST.	CA1910103	5,507	Surface water purchased	1	Below the study levels
PALMDALE WATER DIST.	CA1910102	126,804	Surface water	5	Below the study levels
PARADISE IRRIGATION DISTRICT	CA0410007	9,142	Surface water	2	Below the study levels
PARAMOUNT - CITY, WATER DEPT.	CA1910105	55,200	Surface water purchased	2	Below the study levels
PASADENA-CITY, WATER DEPT.	CA1910124	164,344	Surface water purchased	4	Below the study levels
PASO ROBLES WATER DEPARTMENT	CA4010007	31,176	Surface water	12	Reached a study level
PATTERSON TRACT CSD	CA5402038	550	Ground water	1	Below the study levels
PATTERSON, CITY OF	CA5010017	24,977	Ground water	6	Below the study levels
PETALUMA, CITY OF	CA4910006	60,781	Ground water	1	Below the study levels
PETER PITCHESS HONOR RANCHO DETN. CTR	CA1900046	7,000	Ground water	1	Reached a study level
PHELAN PINON HILLS CSD	CA3610120	24,285	Ground water	7	Below the study levels
PICO RIVERA - CITY, WATER DEPT.	CA1910042	40,600	Ground water	8	Reached a study level
PICO WD	CA1910125	22,051	Ground water	4	Reached a study level
PINEDALE COUNTY WATER DISTRICT	CA1010026	16,736	Ground water	5	Reached a study level
PISMO BEACH WATER DEPARTMENT	CA4010008	8,036	Surface water purchased	3	Below the study levels
PLACER CWA - AUBURN/BOWMAN	CA3110005	27,294	Surface water	2	Below the study levels
PLACER CWA - FOOTHILL	CA3110025	89,544	Surface water	2	Below the study levels
PLACERVILLE, CITY OF - MAIN	CA0910003	9,224	Surface water purchased	1	Below the study levels
PLANADA CSD	CA2410007	4,164	Ground water	6	Reached a study level
PLEASANT VALLEY MUTUAL WATER CO	CA5610008	5,000	Surface water purchased	2	Reached a study level
PLUMAS LAKE	CA5805001	10,464	Ground water	2	Below the study levels
POMONA - CITY, WATER DEPT.	CA1910126	151,713	Surface water	10	Reached a study level
PORT HUENEME WATER DEPT	CA5610009	21,407	Surface water purchased	1	Below the study levels
PORTERVILLE, CITY OF	CA5410010	63,487	Ground water	30	Reached a study level
PORTERVILLE-JONES CORNER	CA5410048	339	Ground water	2	Below the study levels
POWAY, CITY OF	CA3710015	49,888	Surface water	1	Below the study levels
Pala North	090605153	14,280	Ground water	4	Reached a study level
Pauma	090605012	5,700	Ground water	2	Below the study levels
Pechanga	090605013	29,100	Surface water purchased	5	Below the study levels
QUARTZ HILL WATER DIST.	CA1910130	19,100	Surface water purchased	4	Below the study levels
RAMONA MUNICIPAL WD	CA3710019	37,047	Surface water purchased	1	Below the study levels
RANCHERITOS MWC	CA3600200	487	Ground water	3	Below the study levels
RANCHO CALIFORNIA WATER DISTRICT	CA3310038	146,147	Surface water purchased	38	Reached a study level
RANCHO MURIETA COMMUNITY SERVI	CA3410005	5,728	Surface water	2	Below the study levels
REDLANDS CITY MUD-WATER DIV	CA3610037	78,025	Surface water	18	Reached a study level
REDWOOD VALLEY COUNTY WATER DISTRICT	CA2310008	5,200	Surface water	1	Below the study levels
REEDLEY, CITY OF	CA1010027	26,076	Ground water	7	Below the study levels
RIALTO, CITY OF	CA3610038	54,453	Surface water purchased	9	Below the study levels
RIO DELL, CITY OF	CA1210012	3,300	Surface water	2	Below the study levels
RIO LINDA/ELVERTA COMMUNITY WATER DIST	CA3410018	15,460	Ground water	12	Below the study levels
RIPON, CITY OF	CA3910007	15,741	Ground water	5	Reached a study level
RIVERBANK, CITY OF	CA5010018	24,834	Ground water	9	Below the study levels
RIVERSIDE CSA #122-MESA VERDE	CA3310028	766	Ground water	1	Below the study levels
RIVERSIDE HIGHLAND WATER COMPANY	CA3610057	20,188	Ground water	3	Reached a study level
RIVERSIDE, CITY OF	CA3310031	298,398	Groundwater under influence of surface water	1	Below the study levels
ROHNERT PARK, CITY OF	CA4910014	43,821	Ground water	8	Below the study levels
ROSAMOND CSD	CA1510018	17,711	Surface water purchased	2	Below the study levels
ROWLAND WATER DISTRICT	CA1910194	56,100	Surface water purchased	4	Below the study levels
RUBIDOUX COMMUNITY SD	CA3310044	36,827	Ground water	2	Below the study levels
RUBIO CANON LAND & WATER ASSOCIATION	CA1910140	9,215	Surface water	5	Reached a study level
RUNNING SPRINGS WATER DISTRICT	CA3610062	5,268	Surface water purchased	10	Reached a study level
RUSSIAN RIVER COUNTY WATER DISTRICT	CA4910008	4,150	Ground water	1	Below the study levels
Rincon Northern	090600147	7,003	Ground water	3	Reached a study level
SACRAMENTO SUBURBAN WATER DISTRICT	CA3410001	194,444	Surface water purchased	57	Below the study levels
SALINAS VALLEY STATE PRISON	CA2710851	2,930	Ground water	2	Below the study levels
SAN ANTONIO WATER COMPANY	CA3610085	3,441	Ground water	4	Below the study levels
SAN BERNARDINO CITY	CA3610039	214,665	Ground water	22	Below the study levels
SAN DIEGO, CITY OF	CA3710020	1,385,379	Surface water	4	Below the study levels
SAN DIEGUITO WD	CA3710021	40,405	Surface water purchased	1	Below the study levels
SAN FERNANDO-CITY, WATER DEPT.	CA1910143	23,946	Ground water	4	Below the study levels
SAN FRANCISCO REGIONAL WATER SYSTEM	CA3810001	600	Surface water	3	Below the study levels
SAN GABRIEL COUNTY WD	CA1910144	39,345	Ground water	5	Below the study levels
SAN GABRIEL VALLEY WATER CO.-MONTEBELLO	CA1910189	9,630	Ground water purchased	1	Below the study levels
SAN GABRIEL VALLEY WC - FONTANA	CA3610041	237,700	Surface water	11	Below the study levels
SAN JACINTO, CITY OF	CA3310032	18,950	Ground water	3	Below the study levels
SAN JOAQUIN COUNTY - LINCOLN VILLAGE	CA3910010	5,841	Surface water purchased	1	Below the study levels
SAN JOAQUIN COUNTY-MOKELUMNE ACRES	CA3910017	3,802	Ground water	5	Reached a study level
SAN JOAQUIN RIVER CLUB INC	CA3910018	600	Ground water	1	Below the study levels
SAN JOAQUIN, CITY OF	CA1010034	4,060	Ground water	3	Below the study levels
SAN JOSE WATER	CA4310011	1,039,920	Surface water	19	Below the study levels
SAN JUAN WATER DISTRICT	CA3410021	29,598	Surface water	1	Below the study levels
SAN LORENZO VALLEY WATER DIST	CA4410014	21,145	Surface water	8	Below the study levels
SAN LUIS OBISPO WATER DEPARTMENT	CA4010009	47,788	Surface water	1	Below the study levels
SANTA ANA RIVER WATER COMPANY	CA3310033	5,848	Ground water	1	Below the study levels
SANTA CLARITA VALLEY W.A.-VALENCIA DIVIS	CA1910240	294,090	Surface water	9	Reached a study level
SANTA CRUZ WATER DEPARTMENT	CA4410010	94,626	Surface water	3	Below the study levels
SANTA FE I.D.	CA3710023	21,578	Surface water	1	Below the study levels
SANTA FE SPRINGS - CITY, WATER DEPT.	CA1910245	19,219	Surface water purchased	2	Reached a study level
SANTA MARGARITA WATER DISTRICT	CA3010101	168,289	Surface water purchased	2	Below the study levels
SANTA MARIA WATER DEPARTMENT	CA4210011	109,477	Surface water purchased	1	Below the study levels
SANTA MONICA-CITY, WATER DIVISION	CA1910146	89,947	Surface water purchased	3	Below the study levels
SANTA PAULA WATER SYSTEM	CA5610011	31,018	Ground water	3	Below the study levels
SANTA ROSA, CITY OF	CA4910009	175,396	Ground water	2	Below the study levels
SANTA YNEZ RIVER WATER CONS. DIST. ID#1	CA4210020	7,022	Surface water purchased	9	Below the study levels
SBDNO COUNTY SERVICE AREA 64	CA3610121	14,911	Ground water	2	Below the study levels
SBNDO COUNTY SERVICE AREA 70J	CA3610125	12,843	Ground water	2	Below the study levels
SCOTTS VALLEY WATER DISTRICT	CA4410013	11,197	Ground water	3	Below the study levels
SCWA - ARDEN PARK VISTA	CA3410002	10,101	Ground water	10	Reached a study level
SCWA - LAGUNA/VINEYARD	CA3410029	184,896	Surface water	19	Reached a study level
SCWA MATHER-SUNRISE	CA3410704	30,825	Surface water purchased	3	Below the study levels
SEA RANCH WATER COMPANY,THE (PUC)	CA4910007	1,160	Surface water	2	Below the study levels
SEBASTOPOL, CITY OF	CA4910011	7,522	Ground water	4	Below the study levels
SERRANO WATER DISTRICT	CA3010082	5,659	Surface water purchased	2	Below the study levels
SFPUC CITY DISTRIBUTION DIVISION	CA3810011	848,019	Surface water purchased	6	Below the study levels
SFWP-MINERS RANCH	CA0410006	22,664	Surface water	1	Below the study levels
SHAFTER, CITY OF	CA1510019	21,915	Ground water	6	Below the study levels
SIERRA MADRE-CITY, WATER DEPT.	CA1910148	11,000	Surface water purchased	2	Below the study levels
SIGNAL HILL - CITY, WATER DEPT.	CA1910149	11,848	Surface water purchased	3	Below the study levels
SLVWD - FELTON WATER SYSTEM	CA4410002	4,340	Surface water	2	Below the study levels
SO. CAL. EDISON CO.-SANTA CATALINA	CA1910006	3,822	Surface water	8	Below the study levels
SOLEDAD, CITY OF	CA2710011	19,455	Ground water	5	Below the study levels
SOLVANG WATER DIVISION	CA4210013	6,126	Surface water purchased	9	Below the study levels
SONOMA STATE UNIVERSITY	CA4910027	10,986	Ground water	1	Below the study levels
SONOMA, CITY OF	CA4910012	11,725	Ground water	6	Reached a study level
SOQUEL CREEK WATER DISTRICT	CA4410017	40,809	Surface water purchased	14	Below the study levels
SOUTH COAST WATER DISTRICT	CA3010042	41,118	Surface water purchased	3	Below the study levels
SOUTH GATE-CITY, WATER DEPT.	CA1910152	76,443	Surface water purchased	5	Reached a study level
SOUTH MESA WC	CA3310017	10,108	Ground water	8	Below the study levels
SOUTH MONTEBELLO IRRIGATION DIST.	CA1910153	15,021	Ground water	2	Reached a study level
SOUTH TAHOE PUD - MAIN	CA0910002	100,000	Ground water	14	Reached a study level
ST. HELENA, CITY OF	CA2810004	5,386	Surface water	3	Below the study levels
STALLION SPRINGS CSD	CA1510025	4,910	Ground water	4	Below the study levels
STANFORD UNIVERSITY	CA4310013	35,853	Surface water purchased	1	Below the study levels
SUBURBAN WATER SYSTEMS-GLENDORA	CA1910046	5,249	Surface water purchased	1	Below the study levels
SUBURBAN WATER SYSTEMS-LA MIRADA	CA1910059	56,793	Surface water purchased	3	Reached a study level
SUBURBAN WATER SYSTEMS-SAN JOSE	CA1910205	168,843	Surface water purchased	7	Below the study levels
SUISUN-SOLANO WATER AUTHORITY	CA4810005	29,105	Surface water	1	Below the study levels
SUNNY SLOPE WATER CO.	CA1910157	25,252	Ground water	2	Below the study levels
SWEETWATER AUTHORITY	CA3710025	191,282	Surface water	3	Reached a study level
Suburban Water Systems - Whittier	CA1910174	66,045	Ground water	1	Reached a study level
Sycuan	090605024	12,350	Surface water purchased	1	Below the study levels
TAHOE CITY PUD - MAIN	CA3110010	5,661	Ground water	5	Below the study levels
TEMESCAL VALLEY WATER DISTRICT	CA3310074	21,971	Surface water purchased	1	Below the study levels
TEMPLETON CSD	CA4010019	8,011	Ground water	5	Below the study levels
THERMALITO WATER & SEWER DIST	CA0410008	12,136	Surface water	5	Below the study levels
THOUSAND OAKS WATER DEPT	CA5610020	53,157	Surface water purchased	1	Below the study levels
THOUSAND TRAILS SAN BENITO PRESERVE	CA3500505	1,017	Ground water	2	Below the study levels
TIPTON COMMUNITY SERVICES DIST	CA5410014	2,543	Ground water	3	Below the study levels
TORRANCE-CITY, WATER DEPT.	CA1910213	106,183	Surface water purchased	3	Below the study levels
TOWN OF DISCOVERY BAY	CA0710009	16,790	Ground water	2	Below the study levels
TOWN OF HILLSBOROUGH	CA4110016	11,766	Surface water purchased	1	Below the study levels
TRACT 180 MUTUAL WATER CO.	CA1910159	14,000	Ground water	2	Reached a study level
TRACT 349 MUTUAL WATER CO.	CA1910160	8,700	Ground water	2	Reached a study level
TRACY, CITY OF	CA3910011	96,609	Surface water	6	Below the study levels
TROUT GULCH MUTUAL WATER COMPANY	CA4400502	614	Ground water	1	Below the study levels
TRUCKEE-DONNER PUD, MAIN	CA2910003	36,730	Ground water	10	Below the study levels
TUD - COLUMBIA WATER SYSTEM	CA5510013	5,463	Surface water	2	Below the study levels
TUD - SONORA/JAMESTOWN WATER SYSTEM	CA5510001	11,054	Surface water	1	Below the study levels
TUD - UPPER BASIN WATER SYSTEM	CA5510012	13,280	Surface water	3	Below the study levels
TUD-WARDS FERRY RANCHES	CA5500363	62	Ground water	1	Below the study levels
TULARE, CITY OF	CA5410015	72,241	Ground water	22	Below the study levels
TURLOCK, CITY OF	CA5010019	72,682	Surface water purchased	5	Below the study levels
TWENTYNINE PALMS WATER DISTRICT	CA3610049	18,795	Ground water	7	Below the study levels
Table Mountain Rancheria	090600154	10,675	Surface water	1	Below the study levels
UC Davis	CA5710009	49,616	Surface water purchased	7	Below the study levels
UKIAH, CITY OF	CA2310003	16,607	Surface water	6	Reached a study level
UNION PUBLIC UTILITY DISTRICT	CA0510001	4,774	Surface water	1	Below the study levels
UPLAND, CITY OF	CA3610050	78,376	Surface water	10	Below the study levels
US ARMY FORT IRWIN	CA3610705	15,701	Ground water	1	Below the study levels
USMC - 29 PALMS	CA3610703	16,067	Ground water	1	Below the study levels
VALENCIA HEIGHTS WATER CO.	CA1910163	7,775	Surface water purchased	2	Below the study levels
VALLECITOS WD	CA3710002	113,500	Surface water purchased	2	Below the study levels
VALLEY COUNTY WATER DIST.	CA1910009	68,871	Ground water	3	Below the study levels
VALLEY OF THE MOON WATER DISTRICT	CA4910013	23,107	Ground water	7	Reached a study level
VALLEY VIEW MUTUAL WATER CO.	CA1910165	4,613	Ground water	1	Below the study levels
VALLEY WATER CO.	CA1910166	10,070	Surface water purchased	1	Below the study levels
VANDENBERG VILLAGE COMM. SERV. DIST.	CA4210017	7,308	Ground water	1	Below the study levels
VAUGHN WC INC	CA1510029	37,189	Ground water	13	Below the study levels
VENTURA CWWD NO. 1 - MOORPARK	CA5610018	35,514	Surface water purchased	4	Below the study levels
VENTURA RIVER WATER DISTRICT	CA5610022	6,100	Surface water purchased	3	Below the study levels
VENTURA WATER DEPARTMENT	CA5610017	113,500	Surface water	4	Below the study levels
VENTURA WWD NO. 8 - SIMI VALLEY	CA5610023	94,738	Surface water purchased	2	Below the study levels
VERNON-CITY, WATER DEPT.	CA1910167	28,112	Surface water purchased	8	Below the study levels
VICTORVILLE WATER DISTRICT	CA3610052	135,983	Surface water purchased	15	Below the study levels
VISTA IRRIGATION DISTRICT	CA3710027	132,430	Surface water	2	Below the study levels
Viejas Community System	090600158	9,600	Ground water	2	Below the study levels
WALNUT PARK MUTUAL WATER CO.	CA1910169	16,180	Ground water	1	Below the study levels
WALNUT VALLEY WATER DISTRICT	CA1910234	100,941	Surface water purchased	2	Below the study levels
WASCO ST. PRISON RECEPTION CTR	CA1510801	5,124	Ground water	1	Below the study levels
WASCO, CITY OF	CA1510021	22,757	Ground water	6	Below the study levels
WATSONVILLE, CITY OF	CA4410011	65,231	Surface water	14	Reached a study level
WEAVERVILLE C.S.D.	CA5310001	3,975	Surface water	3	Reached a study level
WEST KERN WATER DISTRICT	CA1510022	20,500	Ground water	1	Below the study levels
WEST VALLEY WATER DISTRICT	CA3610004	104,498	Surface water	9	Below the study levels
WESTBOROUGH COUNTY WATER DIST	CA4110027	13,486	Surface water purchased	1	Below the study levels
WESTERN HEIGHTS WATER COMPANY	CA3610053	7,705	Surface water purchased	1	Below the study levels
WESTERN MWD	CA3310049	86,062	Surface water purchased	3	Below the study levels
WESTERN MWD - MURRIETA DIVISION	CA3310036	17,453	Surface water purchased	3	Reached a study level
WILLITS, CITY OF	CA2310004	6,175	Surface water	1	Below the study levels
WILLOW COUNTY WATER DISTRICT	CA2310005	3,797	Surface water purchased	1	Below the study levels
WINDSOR, TOWN OF	CA4910017	25,561	Ground water	2	Below the study levels
WINE COUNTRY APARTMENTS	CA3900559	40	Ground water	1	Below the study levels
WINTON WATER & SANITARY DIST	CA2410010	9,745	Ground water	3	Below the study levels
WOODLAKE, CITY OF	CA5410020	7,846	Ground water	7	Below the study levels
YORBA LINDA WATER DISTRICT	CA3010037	84,292	Surface water purchased	3	Below the study levels
YOSEMITE SPRING PARK UTIL CO	CA2010005	5,300	Ground water	9	Reached a study level
YREKA, CITY OF	CA4710011	7,825	Surface water	1	Below the study levels
YUCAIPA VALLEY WATER DISTRICT	CA3610055	52,010	Surface water	16	Below the study levels

How the count works

What is included

Each active community water system with complete monitoring is counted once, even if it is linked with several ZIP codes. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system. This page does not apply California's state-specific standards or determine compliance. Use the official state or territory drinking-water program for current regulatory information.

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PFAS in California drinking water

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System counts in California

Community water systems with complete monitoring

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