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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
SONOMA STATE UNIVERSITY CA4910027 California Community 10,986
HEALDSBURG, CITY OF CA4910005 California Community 10,985
DEL ORO WATER CO.-PARADISE PINES CA0410011 California Community 10,940
LAWRENCE LIVERMORE NATIONAL LAB SITE 200 CA0110701 California Non-Transient Non-Community 10,870
GSWC - WILLOWBROOK CA1910072 California Community 10,747
Table Mountain Rancheria 090600154 California Community 10,675
CALIFORNIA INSTITUTION FOR MEN CA3610850 California Community 10,667
CITY OF SHASTA LAKE CA4510006 California Community 10,657
CALIFORNIA WATER SERVICE CO. - DIXON CA4810002 California Community 10,623
CITY OF RIO VISTA CA4810004 California Community 10,489
PLUMAS LAKE CA5805001 California Community 10,464
CLOVERDALE, CITY OF CA4910002 California Community 10,398
FARMERSVILLE, CITY OF CA5410004 California Community 10,243
YUBA CITY GROUNDWATER-REGION 2-3 CA5110003 California Community 10,200
SHASTA DISTRICT FAIR CA4500153 California Transient Non-Community 10,200
Graton Resort and Casino 090605174 California Non-Transient Non-Community 10,127
SOUTH MESA WC CA3310017 California Community 10,108
SCWA - ARDEN PARK VISTA CA3410002 California Community 10,101
VALLEY WATER CO. CA1910166 California Community 10,070
ANZA VALLEY BUSINESS CA3301158 California Transient Non-Community 10,014
GREEN VALLEY CAMPGROUND CA3601149 California Transient Non-Community 10,000
SANTA CLARITA VALLEY W.A.-CASTAIC DIV. CA1910247 California Community 9,999
KERN RIVER STATE PARK CA1502316 California Transient Non-Community 9,999
CAL TRANS TWO RIVER RESTSTOP CA1300602 California Transient Non-Community 9,999
CALAVERAS COUNTY FAIRGROUNDS CA0500005 California Transient Non-Community 9,999
CAL-AM WATER COMPANY - EAST PASADENA CA1910020 California Community 9,949
GREEN VALLEY CAMPGROUND CA3600011 California Transient Non-Community 9,939
LAKE HENSHAW RESORT INC. CA3700900 California Community 9,913
CCWD - JENNY LIND CA0510006 California Community 9,861
GOLDEN HILLS CSD CA1510045 California Community 9,857
BLYTHE - CITY OF CA3310003 California Community 9,798
WINTON WATER & SANITARY DIST CA2410010 California Community 9,745
SAN GABRIEL VALLEY WATER CO-MONTEBELLO 1 CA1910189 California Community 9,630
Viejas Community System 090600158 California Community 9,600
CITY OF ORANGE COVE CA1010023 California Community 9,525
Hard Rock Fire Mountain Water System 090605172 California Non-Transient Non-Community 9,500
MYOMA DUNES MUTUAL WATER COMPANY CA3310051 California Community 9,445
GEORGETOWN DIVIDE PUD CA0910013 California Community 9,434
HURON, CITY OF CA1010044 California Community 9,306
LA CANADA IRRIGATION DIST. CA1910054 California Community 9,300
CITY OF LIVE OAK CA5110001 California Community 9,285
CALIFORNIA STATE FAIR CA3410026 California Community 9,280
PLACERVILLE, CITY OF - MAIN CA0910003 California Community 9,224
RUBIO CANON LAND & WATER ASSOCIATION CA1910140 California Community 9,215
PARADISE IRRIGATION DISTRICT CA0410007 California Community 9,142
NEVADA ID - LAKE WILDWOOD CA2910023 California Community 9,108
TEHACHAPI, CITY OF CA1510020 California Community 9,094
EBRPD - DEL VALLE REGIONAL PARK CA0105010 California Transient Non-Community 9,024
BRECON ESTATE CA4000850 California Transient Non-Community 9,012
33RD DISTRICT AGRICULTURAL ASSOCIATION CA3500557 California Transient Non-Community 9,000