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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
LE GRAND COMM SERVICES DIST CA2410011 California Community 1,739
SEELEY CWD CA1310013 California Community 1,729
GOLDEN STATE WATER CO - MORONGO DEL SUR CA3610063 California Community 1,717
CAL AMERICAN WC - RIO PLAZA CA5610010 California Community 1,709
DUNSMUIR, CITY OF CA4710002 California Community 1,707
BRANCH CENTER [SWS] CA3400180 California Non-Transient Non-Community 1,700
IBM-SANTA TERESA LAB CA4300591 California Non-Transient Non-Community 1,700
MT BALDY HOMEOWNERS ASSN. CA3610033 California Community 1,700
SIERRA ARMY DEPOT HERLONG CA1810701 California Community 1,700
CAL AM - ISLETON CA3410012 California Community 1,693
PCWA - WEIMAR CA3110035 California Community 1,689
RICHLAND FARMS MUTUAL WTR CO CA1910135 California Community 1,688
FRESNO COUNTY WATER WORKS CA1010041 California Community 1,680
DEL ORO WATER CO-FERNDALE CA1210007 California Community 1,662
WESTWOOD C.S.D. CA1810002 California Community 1,662
OAKLAND PARK VA6099350 California Community 1,659
PRUNEDALE SHOPPING CENTER WS CA2701231 California Non-Transient Non-Community 1,650
SKYLINE COUNTY WATER DISTRICT CA4110015 California Community 1,650
CASTLE AIRPORT CA2410700 California Community 1,650
FRESNO CO WATERWORKS DIST 23 CA1010046 California Community 1,650
CSP MARSHALL GOLD DISCOVERY CA0910304 California Transient Non-Community 1,643
MADERA CO CMD19-PARKWOOD CA2010004 California Community 1,637
AVILA BEACH COMMUNITY SERVICES DISTRICT CA4000222 California Community 1,630
HILMAR CHEESE COMPANY CA2400170 California Non-Transient Non-Community 1,629
RIVERBEND SCHOOL CA5401058 California Non-Transient Non-Community 1,626
BIOLA COMMUNITY SERVICES DIST CA1010049 California Community 1,623
BRANNAN ISLAND STATE REC. AREA CA3410302 California Transient Non-Community 1,622
CSP - ANGEL ISLAND ST PARK CA2110302 California Transient Non-Community 1,622
LIBERTY UTILITIES - MESA CREST CA1910241 California Community 1,619
RICHGROVE COMMUNITY SERVICES DISTRICT CA5410024 California Community 1,617
FOREST HOME CHRISTIAN CC CA3600106 California Non-Transient Non-Community 1,600
TIGER WATER SUPPLY CA4000205 California Non-Transient Non-Community 1,600
CALIFORNIA CORRECTION INSTITUT CA0000120 California Community 1,600
DEUEL VOCATIONAL INSTITUTION CA0000122 California Community 1,600
GOLDEN WEST HIGH SCHOOL CA5401059 California Non-Transient Non-Community 1,600
EL DORADO IRRIGATION DISTRICT CA0210102 California Community 1,600
CALIF. PARKS & RECREATION CA1200561 California Transient Non-Community 1,600
BIGBY TOWNSITE MUTUAL CA1900567 California Community 1,600
CALIFORNIA CA7300120 California Community 1,600
CAL TRANS - FENNER CA3601098 California Transient Non-Community 1,600
LOS ALAMITOS RACE COURSE CA3000819 California Non-Transient Non-Community 1,600
SAN MIGUELITO MWC CA4010003 California Community 1,600
SMWD-NICHOLS INSTITUTE CA3000980 California Non-Transient Non-Community 1,600
CALLAYOMI COUNTY WATER DISTRICT CA1710013 California Community 1,598
PARK WATER CO SYSTEM 52 CA1910123 California Community 1,592
DURHAM IRRIGATION DISTRICT CA0410003 California Community 1,581
DEVORE WC CA3610117 California Community 1,574
OID-OAKDALE RURAL WATER SYSTEM #1 CA5000433 California Community 1,570
LOPEZ PROJECT CA4010022 California Community 1,569
MADERA CO SA1-INDIAN LAKES CA2010011 California Community 1,562