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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
PICO WD CA1910125 California Community 22,051
TEMESCAL VALLEY WATER DISTRICT CA3310074 California Community 21,971
SHAFTER, CITY OF CA1510019 California Community 21,915
LINDA COUNTY WATER DISTRICT CA5810002 California Community 21,654
IMPERIAL, CITY OF CA1310006 California Community 21,591
SANTA FE I.D. CA3710023 California Community 21,578
EL DORADO IRRIGATION DISTRICT CA0910020 California Community 21,573
AMERICAN CANYON, CITY OF CA2810005 California Community 21,437
PORT HUENEME CITY WATER DEPT CA5610009 California Community 21,407
SAN LORENZO VALLEY WATER DIST CA4410014 California Community 21,145
ARCATA, CITY OF CA1210001 California Community 20,875
CAL/AM WATER COMPANY - BALDWIN HILLS CA1910052 California Community 20,724
WEST KERN WATER DISTRICT CA1510022 California Community 20,500
OTAY MUNI WATER DIST CA3710040 California Community 20,314
NORWALK - CITY, WATER DEPT. CA1910191 California Community 20,283
DHS BOULEVARD BORDER PATROL CA3710051 California Non-Transient Non-Community 20,270
LOMITA-CITY, WATER DEPT. CA1910073 California Community 20,256
RIVERSIDE HIGHLAND WATER COMPANY CA3610057 California Community 20,188
CAMPBELL WATER COMPANY CA4310003 California Community 20,000
CAL AM - ROSEMONT CA3410034 California Community 19,892
HUMBOLDT C.S.D. CA1210009 California Community 19,807
ARVIN COMMUNITY SERVICES DIST CA1510001 California Community 19,669
CALIFORNIA WATER SERVICE CO - WESTLAKE CA5610016 California Community 19,533
SOLEDAD, CITY OF CA2710011 California Community 19,455
PHELPS VINEYARDS CA2800609 California Non-Transient Non-Community 19,412
KERN MEDICAL CENTER WATER CA1502312 California Non-Transient Non-Community 19,400
SANTA FE SPRINGS - CITY, WATER DEPT. CA1910245 California Community 19,219
QUARTZ HILL WATER DIST. CA1910130 California Community 19,100
LAMONT PUBLIC UTILITY DIST CA1510012 California Community 19,057
GREENFIELD, CITY OF CA2710008 California Community 18,967
SAN JACINTO, CITY OF CA3310032 California Community 18,950
COASTSIDE COUNTY WATER DISTRICT CA4110011 California Community 18,940
SOUTH BAY ROD & GUN CLUB INC. CA3700065 California Transient Non-Community 18,900
TWENTYNINE PALMS WATER DISTRICT CA3610049 California Community 18,795
BELLA VISTA WATER DISTRICT CA4510014 California Community 18,612
NPS GGNRA CA2110350 California Community 18,447
LAGUNA BEACH COUNTY WD CA3010017 California Community 18,404
CALIFORNIA WATER SERVICE CO.-TRAVIS AFB CA4810701 California Community 18,111
Thunder Valley Casino 090605161 California Non-Transient Non-Community 18,007
YUBA COUNTY MOTORPLEX CA5800003 California Transient Non-Community 18,000
BUTTE-GLENN COMMUNITY COLLEGE DIST CA0400070 California Non-Transient Non-Community 18,000
CITY OF ARROYO GRANDE UTILITIES DIVISION CA4010001 California Community 17,963
ROSAMOND CSD CA1510018 California Community 17,711
SOUTH COAST WD - CAPISTRANO BEACH CA3010055 California Community 17,503
SANTA CLARITA VALLEY W.A.-NEWHALL DIV. CA1910096 California Community 17,498
WESTERN MWD - MURRIETA DIVISION CA3310036 California Community 17,453
BAKMAN WATER COMPANY CA1010001 California Community 17,393
COALINGA-CITY CA1010004 California Community 17,277
CITY OF CRESCENT CITY CA0810001 California Community 17,262
KERMAN, CITY OF CA1010018 California Community 17,256