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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
TRIUNFO WATER & SANITATION DISTRICT CA5610043 California Community 13,898
NIPOMO COMM SERVICES DIST CA4010026 California Community 13,771
MORRO BAY PW DEPT - WATER DIVISION CA4010011 California Community 13,757
DEL ESTE WATER CO CA5010004 California Community 13,720
AVENAL, CITY OF CA1610002 California Community 13,696
TRABUCO CANYON WATER DISTRICT CA3010094 California Community 13,659
KINGSBURG, CITY OF CA1010019 California Community 13,540
WESTBOROUGH WATER DISTRICT CA4110027 California Community 13,486
TUD - UPPER BASIN WATER SYSTEM CA5510012 California Community 13,280
PALOMAR CHRISTIAN CONFERENCE CENTER CA3701982 California Community 13,050
INDIAN HILLS CAMP CA3701476 California Community 13,032
MUSCOY MWC NO. 1 CA3610031 California Community 13,000
SBDNO COUNTY SERVICE AREA 70J CA3610125 California Community 12,843
Yocha Dehe Potable Water System 090605107 California Community 12,800
BIG BEAR CITY CSD CA3610008 California Community 12,738
CITY OF GROVER BEACH PUBLIC WORKS DEPT CA4010004 California Community 12,701
LINDSAY, CITY OF CA5410006 California Community 12,659
CAMP PENDLETON (NORTH) CA3710700 California Community 12,651
LOS ANGELES CWWD 40, REG. 38-LAKE LA CA1910005 California Community 12,568
CITY OF DIXON CA4810009 California Community 12,540
CAL-WATER SERVICE CO.-MARYSVILLE CA5810001 California Community 12,419
Sycuan 090605024 California Community 12,350
CITY OF NEWMAN-WATER DEPARTMENT CA5010013 California Community 12,207
THERMALITO WATER & SEWER DIST CA0410008 California Community 12,136
FORTUNA, CITY OF CA1210006 California Community 12,133
CABRILLO COLLEGE CA4400753 California Non-Transient Non-Community 12,000
KERN CO P&R-BUENA VISTA AQUATIC REC AREA CA1502357 California Transient Non-Community 12,000
BURBANK COMMUNITY WATER ASSOC. CA1500026 California Community 12,000
MONTECITO WATER DIST CA4210007 California Community 11,962
LUPINE BASS LAKE CA2000505 California Transient Non-Community 11,930
SIGNAL HILL - CITY, WATER DEPT. CA1910149 California Community 11,848
TOWN OF HILLSBOROUGH CA4110016 California Community 11,766
SONOMA, CITY OF CA4910012 California Community 11,725
CRESTLINE VILLAGE CWD - DIVISION 10 CA3610015 California Community 11,650
GREENFIELD COUNTY WD CA1510024 California Community 11,590
CCWD - EBBETTS PASS CA0510016 California Community 11,545
LOS ANGELES CWWD 40, R 24,27,33-PEARBLSM CA1910203 California Community 11,509
CITY OF BELL GARDENS CA1910108 California Community 11,437
MENDOTA, CITY OF CA1010021 California Community 11,404
EDWARDS AFB - MAIN BASE CA1510701 California Community 11,316
ASSOCIATE MUTUAL WATER COMPANY CA1500572 California Non-Transient Non-Community 11,282
Red Hawk Casino - Shingle Springs 090600058 California Community 11,268
BUTTONWILLOW PARK WATER SYSTEM CA1502306 California Transient Non-Community 11,250
SCOTTS VALLEY WATER DISTRICT CA4410013 California Community 11,197
EXETER, CITY OF CA5410003 California Community 11,169
CITY OF ANDERSON CA4510001 California Community 11,147
CAL-WATER SERVICE CO.-OROVILLE CA0410005 California Community 11,106
TUD - SONORA/JAMESTOWN WATER SYSTEM CA5510001 California Community 11,054
CASITAS MUNICIPAL WATER DIST CA5610024 California Community 11,005
SIERRA MADRE-CITY, WATER DEPT. CA1910148 California Community 11,000