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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
SANTA CLARITA VALLEY W.A.-TESORO DIV. CA1910255 California Community 6,499
MADERA VALLEY WATER COMPANY CA2010010 California Community 6,494
YMCA CAMP WHITTLE CA3600588 California Transient Non-Community 6,466
CITY OF COLUSA CA0610002 California Community 6,447
LOS ANGELES CWWD 36-VAL VERDE CA1910185 California Community 6,376
FRESNO COUNTY WATER WORKS CA1010010 California Community 6,374
EL DORADO IRRIGATION DISTRICT CA0910004 California Community 6,366
HOLTVILLE, CITY OF CA1310005 California Community 6,355
MAYWOOD MUTUAL WATER CO. #2 CA1910085 California Community 6,349
HELENDALE COMMUNITY SERVICE DISTRICT CA3610112 California Community 6,347
NORTH TAHOE PUD - MAIN CA3110001 California Community 6,321
CALAVERAS PUD CA0510002 California Community 6,286
PURISSIMA HILLS WATER DISTRICT CA4310021 California Community 6,245
HIDDEN VALLEY LAKE CSD CA1710015 California Community 6,235
NORTHROP GRUMMAN CORP. CA1910097 California Non-Transient Non-Community 6,214
GOLDEN STATE WATER CO - APPLE VLY SOUTH CA3610107 California Community 6,208
SOUTHERN CALIF WATER CO CA3010016 California Community 6,202
CUTLER PUD CA5410001 California Community 6,200
WILLITS, CITY OF CA2310004 California Community 6,175
USAF MATHER AIR FORCE BASE CA3410705 California Community 6,162
CITY OF INDUSTRY WATERWORKS SYSTEMS CA1910029 California Community 6,158
CAL TRANS ERRECA REST AREA CA2400057 California Transient Non-Community 6,150
SOLVANG WATER DIVISION CA4210013 California Community 6,126
Jackson Rancheria Casino & Hotel 090605109 California Non-Transient Non-Community 6,120
CITY OF GUSTINE CA2410003 California Community 6,110
VENTURA RIVER WATER DISTRICT CA5610022 California Community 6,100
DINUBA, CITY OF CA5410002 California Community 6,081
MONTARA WATER AND SANITARY DISTRICT CA4110010 California Community 6,078
MAYWOOD MUTUAL WATER CO. #3 CA1910086 California Community 6,059
CAMARILLO STATE HOSPITAL CA7300204 California Community 6,000
SWEETWATER SPRINGS CWD - GUERNEVILLE CA4910004 California Community 6,000
CAMP STUART CA4300714 California Transient Non-Community 6,000
NORTHERN CALIF YOUTH CORR. CENTER CA3910802 California Community 6,000
CALTRANS, WHITEWATER REST AREA CA3301082 California Transient Non-Community 6,000
LAKE ALMANOR COUNTRY CLUB MWC CA3210006 California Community 6,000
SOLEDAD MISSION WS CA2701176 California Transient Non-Community 6,000
CAMARILLO STATE HOSPITAL CA0000204 California Community 6,000
Barona 090600119 California Non-Transient Non-Community 6,000
BELLFLOWER MUNICIPAL WATER SYSTEM CA1910018 California Community 5,999
SAN JOAQUIN COUNTY - LINCOLN VILLAGE CA3910010 California Community 5,990
MALAGA COUNTY WATER DISTRICT CA1010042 California Community 5,979
KONOCTI COUNTY WATER DISTRICT CA1710006 California Community 5,928
GOLDEN STATE WATER COMPANY - LOS OSOS CA4010017 California Community 5,924
GLEN HELEN WATER SYSTEM CA3600108 California Community 5,900
SANTA ANA RIVER WATER COMPANY CA3310033 California Community 5,848
LOS ANGELES CO WW DIST 1 CA1910068 California Community 5,750
RANCHO MURIETA COMMUNITY SERVI CA3410005 California Community 5,728
NAVAL BASE VENTURA COUNTY, POINT MUGU CA5610700 California Community 5,700
ROCK RIDGE CAMP GROUND NRAS CA4500045 California Transient Non-Community 5,700
Pauma 090605012 California Community 5,700