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Browse Water Systems

20,002 public water systems in CA.

Public Water Systems Database

Browse 20,002 EPA-regulated public water systems with identifiers, population served, and water source type. Use the filters below to narrow results by state, system type, or name.

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System Name PWSID State Type Population Served
CITY OF HAYWARD CA0110006 California Community 162,954
BAKERSFIELD, CITY OF CA1510031 California Community 160,144
CITY OF SUNNYVALE CA4310014 California Community 157,566
CITY OF ROSEVILLE CA3110008 California Community 155,612
CALIFORNIA WATER SERVICE CO. - ELA CA1910036 California Community 152,474
POMONA - CITY, WATER DEPT. CA1910126 California Community 151,713
CWS - VISALIA CA5410016 California Community 148,496
RANCHO CALIFORNIA WATER DISTRICT CA3310038 California Community 146,147
CALIFORNIA WATER SERVICE CO. - DOMINGUEZ CA1910033 California Community 143,996
CITY OF FULLERTON CA3010010 California Community 139,461
ESCONDIDO, CITY OF CA3710006 California Community 137,044
VICTORVILLE WATER DISTRICT CA3610052 California Community 135,983
SANTA CLARITA VALLEY W.A.-SANTA CLARITA CA1910017 California Community 135,281
JURUPA COMMUNITY SD CA3310021 California Community 135,093
VISTA IRRIGATION DISTRICT CA3710027 California Community 132,430
EL DORADO ID - MAIN CA0910001 California Community 132,171
CITY OF SANTA CLARA CA4310012 California Community 130,746
CITY OF CLOVIS CA1010003 California Community 130,130
PALMDALE WATER DIST. CA1910102 California Community 126,804
CWSC SALINAS CA2710010 California Community 123,679
CITY OF VALLEJO CA4810007 California Community 121,420
CITY OF ORANGE CA3010027 California Community 120,770
CITY OF FAIRFIELD CA4810003 California Community 120,377
CITY OF ANTIOCH CA0710001 California Community 115,074
CAL-WATER SERVICE CO.-CHICO CA0410002 California Community 114,925
GOLDEN STATE WC - WEST ORANGE COUNTY CA3010022 California Community 114,379
VENTURA WATER DEPARTMENT CA5610017 California Community 113,500
VALLECITOS WD CA3710002 California Community 113,500
GREAT OAKS WC INC CA4310022 California Community 110,088
AZUSA LIGHT AND WATER CA1910007 California Community 110,044
MESA WATER DISTRICT CA3010004 California Community 110,000
SAN BERNARDINO VALLEY WD CA3610019 California Community 109,608
CITY OF SANTA MARIA UTILITIES DEPARTMENT CA4210011 California Community 109,477
DOWNEY - CITY, WATER DEPT. CA1910034 California Community 108,816
EAST VALLEY WATER DISTRICT CA3610064 California Community 108,629
TORRANCE-CITY, WATER DEPT. CA1910213 California Community 106,183
CAL-AM WATER CORONADO CA3710001 California Community 106,000
BURBANK-CITY, WATER DEPT. CA1910179 California Community 105,603
CITY OF DALY CITY CA4110013 California Community 104,901
WEST VALLEY WATER DISTRICT CA3610004 California Community 104,498
CALIFORNIA WATER SERVICE - SAN MATEO CA4110008 California Community 102,348
CITY OF SAN JOSE - EVG/EDV/COY CA4310020 California Community 101,265
WALNUT VALLEY WATER DISTRICT CA1910234 California Community 100,941
HESPERIA WD CA3610024 California Community 100,744
SOUTH TAHOE PUD - MAIN CA0910002 California Community 100,000
CITY OF SANTA BARBARA WATER DEPARTMENT CA4210010 California Community 98,872
DUBLIN SAN RAMON SERVICES DISTRICT CA0110009 California Community 98,776
CITY OF VACAVILLE CA4810008 California Community 97,000
CALIFORNIA WATER SERVICE CO. - HERM/REDO CA1910134 California Community 96,853
TRACY, CITY OF CA3910011 California Community 96,609