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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
VAUGHN WC INC CA1510029 California Community 37,189
RAMONA MUNICIPAL WD CA3710019 California Community 37,047
CARLSBAD WATER DIVISION CA3710032 California Community 37,000
NAS NORTH ISLAND & NAB CORONADO CA3710750 California Community 36,990
RUBIDOUX COMMUNITY SD CA3310044 California Community 36,827
TRUCKEE-DONNER PUD, MAIN CA2910003 California Community 36,730
PINE VALLEY BORDER PATROL STATION CA3710049 California Non-Transient Non-Community 36,604
ESTERO MUNICIPAL IMPROVEMENT DISTRICT CA4110021 California Community 36,556
FAIR OAKS WATER DISTRICT CA3410009 California Community 36,226
AGUANGA MARKET WATER SYSTEM CA3301141 California Transient Non-Community 36,012
STANFORD UNIVERSITY CA4310013 California Community 35,853
CRESCENTA VALLEY CWD CA1910028 California Community 35,841
PARK WATER CO CA1910106 California Community 35,712
CAL AM - ANTELOPE CA3410031 California Community 35,534
VENTURA CWWD NO. 1 - MOORPARK CA5610018 California Community 35,514
LAKESIDE WD CA3710013 California Community 35,500
CALIFORNIA WATER SERVICE - SAN CARLOS CA4110007 California Community 35,344
FALLBROOK PUD CA3710008 California Community 35,237
CITY OF LATHROP CA3910015 California Community 35,080
SAN JOSE STATE UNIVERSITY CA4310028 California Community 34,861
GOLDEN STATE WATER COMPANY - ORCUTT CA4210016 California Community 34,102
HEMET, CITY OF CA3310016 California Community 33,828
COVINA-CITY, WATER DEPT. CA1910127 California Community 33,300
CUYAMACA WATER DISTRICT CA3700074 California Community 33,030
CAMROSA WATER DISTRICT CA5610063 California Community 32,700
MANHATTAN BEACH-CITY, WATER DEPT. CA1910083 California Community 32,697
GOLDEN STATE WATER CO - BARSTOW CA3610043 California Community 32,547
EAST NILES CSD CA1510006 California Community 32,517
LOS ANGELES CWWD 29 & 80-MALIBU CA1910204 California Community 32,348
BANNING, CITY OF CA3310006 California Community 31,680
CITY OF BURLINGAME CA4110003 California Community 31,451
LA VERNE, CITY WD CA1910062 California Community 31,334
CITY OF PASO ROBLES WATER DIVISION CA4010007 California Community 31,176
CITY OF SANTA PAULA CA5610011 California Community 31,018
CITY OF MARTINEZ CA0710006 California Community 30,997
SCWA MATHER-SUNRISE CA3410704 California Community 30,825
RINCON DEL DIABLO MWD (ID-1) CA3710018 California Community 30,757
ATASCADERO MUTUAL WATER CO CA4010002 California Community 30,618
MID-PENINSULA WATER DISTRICT CA4110001 California Community 30,609
VALLEY CENTER MWD CA3710026 California Community 29,938
CALIF STATE POLYTECHNICAL UNIV - POMONA CA1910022 California Community 29,854
SAN JUAN WATER DISTRICT CA3410021 California Community 29,598
CITY OF EAST PALO ALTO CA4110024 California Community 29,519
CITY OF ATWATER CA2410001 California Community 29,479
SUISUN-SOLANO WATER AUTHORITY CA4810005 California Community 29,105
Pechanga 090605013 California Community 29,100
VERNON-CITY, WATER DEPT. CA1910167 California Community 28,112
FORT BLISS MAIN POST AREA TX0710020 California Community 28,000
YOGA CENTER MOTHER'S KITCHEN CA3701240 California Transient Non-Community 27,884
PLACER CWA - AUBURN/BOWMAN CA3110005 California Community 27,294