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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
MIDWAY CITY MUTUAL WC CA3010097 California Community 1,305
BROOKE UTILITIES - (OLD) PINE AZ0404043 California Community 1,305
HUNT WESSON FOODS CA5000157 California Non-Transient Non-Community 1,300
AL TAHOE ELEM/STMS (WATER SYS) CA0900646 California Non-Transient Non-Community 1,300
BASELINE GARDENS MWC INACTIVATED 071614 CA3610007 California Community 1,300
YUBA CITY ASSEMBLY HALL CA5103326 California Transient Non-Community 1,300
CALTRANS - SHANDON REST STOP CA4010900 California Transient Non-Community 1,300
NORRIS SCHOOL WATER SYSTEM CA1502199 California Non-Transient Non-Community 1,300
CASTEIC UNION SCHOOL DISTRICT CA1900951 California Non-Transient Non-Community 1,300
PINECREST PERMITTEES ASSN CA5510004 California Community 1,298
WILLOW CREEK C.S.D. CA1210015 California Community 1,298
DEL ORO WATER COMPANY - STRAWBERRY DIV. CA5510007 California Community 1,295
SLO CWWD NO. 23 - SANTA MARGARITA CA4010024 California Community 1,291
California Village 090600237 California Community 1,290
PORTERVILLE DEVELOPMENTAL CENTER CA5410801 California Community 1,281
DEL ORO RIVER ISLAND SERV TERR #1 CA5400665 California Community 1,280
STRATFORD PUD CA1610006 California Community 1,277
GREEN VALLEY CWD CA1910244 California Community 1,275
COUNTRYSIDE CARE CENTER CA1000430 California Community 1,274
DWP - FAWNSKIN CA3610022 California Community 1,271
SONOMA COUNTY CSA 41-FITCH MOUNTAIN CA4910010 California Community 1,265
MONTAGUE, CITY OF CA4710007 California Community 1,264
SUNNYMEAD MUTUAL WATER CO CA3310035 California Community 1,257
MANRESA STATE BEACH CA4410311 California Transient Non-Community 1,252
MCCABE UNION SCHOOL CA1300579 California Non-Transient Non-Community 1,250
LIBERTY UNION HIGH SCHOOL CA0707508 California Transient Non-Community 1,250
LAGUNA SECA RECREATION WS CA2702009 California Non-Transient Non-Community 1,248
KETTLEMAN CITY CSD CA1610009 California Community 1,242
CAMARILLO AIRPORT UTILITY CA5602505 California Non-Transient Non-Community 1,240
SBDNO COUNTY SERVICE AREA 70 CEDAR GLEN CA3610026 California Community 1,240
HOWELL MOUNTAIN MUTUAL WATER COMPANY CA2810001 California Community 1,240
San Pasqual District A 090605017 California Community 1,225
ROLLING GREEN UTILITIES, INC. CA1400010 California Community 1,225
FRESNO COUNTY WATER WORKS CA1010048 California Community 1,225
NPS-DEVILS POSTPILE CA2010501 California Transient Non-Community 1,220
CSP HOLLISTER HILLS SVRA CA3510302 California Transient Non-Community 1,220
RIO BRAVO GREELEY SCHOOL WATER SYSTEM CA1502229 California Non-Transient Non-Community 1,219
Colusa Indian Bingo Casino 090605108 California Non-Transient Non-Community 1,213
CALAVERAS BIG TREES SP - BEAVER CREEK CA0510300 California Transient Non-Community 1,213
HIDDEN VALLEY NATURE CENTER CA3301044 California Transient Non-Community 1,210
SELF-SERVE PETROLEUM CA4800807 California Transient Non-Community 1,210
REDWAY C.S.D. CA1210011 California Community 1,207
NPS PRNS - LIGHTHOUSE CA2110500 California Transient Non-Community 1,202
OROSI HIGH SCHOOL CA5400636 California Non-Transient Non-Community 1,200
DURHAM UNIFIED SCHOOL DISTRICT CA0400066 California Non-Transient Non-Community 1,200
DEPT OF MENTAL HEALTH CA0000207 California Community 1,200
DEFENSE DISTRIB. DEPOT - TRACY SITE CA3910702 California Non-Transient Non-Community 1,200
STOCKTON DEVELOPMENTAL CENTER CA7300211 California Community 1,200
CA5100505 California Community 1,200
PG&E CA4000589 California Non-Transient Non-Community 1,200