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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
KEYES COMMUNITY SERVICES DIST. CA5010009 California Community 5,672
TAHOE CITY PUD - MAIN CA3110010 California Community 5,661
SERRANO WATER DISTRICT CA3010082 California Community 5,659
GOLDEN STATE WATER CO - ARDEN WATER SERV CA3410003 California Community 5,658
CAL AM - MEADOWBROOK CA2410008 California Community 5,656
CALISTOGA, CITY OF CA2810002 California Community 5,610
GREENS CR CAMP GROUND NRAS CA4500043 California Transient Non-Community 5,600
CAMP FRESNO WATER SYSTEM CA1000170 California Transient Non-Community 5,600
BEAR VALLEY CSD CA1510038 California Community 5,592
LINDALE WATER CO INC CA5410029 California Community 5,570
CDCR CALIFORNIA HEALTH CARE FACILITY CA3910803 California Community 5,551
GOLDEN STATE WC - YORBA LINDA CA3010070 California Community 5,551
CITY OF WILLIAMS CA0610004 California Community 5,538
CAMBRIA COMM SERVICES DIST CA4010014 California Community 5,532
RIVERSTONE/ROOTCREEK WATER DISTRICT CA2010016 California Community 5,507
PALM RANCH IRRIGATION DIST. CA1910103 California Community 5,507
HILMAR COUNTY WATER DISTRICT CA2410012 California Community 5,504
MILLVIEW COUNTY WATER DISTRICT CA2310006 California Community 5,500
MAYWOOD MUTUAL WATER CO. #1 CA1910084 California Community 5,500
TUD - COLUMBIA WATER SYSTEM CA5510013 California Community 5,463
FRESNO CO WATERWORKS DIST 25 CA1010040 California Community 5,450
CALIFORNIA WTR SERV CO CA4310008 California Community 5,400
TUD - CRYSTAL FALLS WATER SYSTEM CA5510010 California Community 5,393
ST. HELENA, CITY OF CA2810004 California Community 5,386
LA HABRA HEIGHTS CWD CA1910218 California Community 5,325
YOSEMITE SPRING PARK UTIL CO CA2010005 California Community 5,300
CWSC SALINAS HILLS CA2710012 California Community 5,293
RUNNING SPRINGS WATER DISTRICT CA3610062 California Community 5,268
SUBURBAN WATER SYSTEMS-GLENDORA CA1910046 California Community 5,249
VALLEY AUTO WATER CA3301137 California Transient Non-Community 5,215
GOOSENECK COVE CAMP NRAS CA4500044 California Transient Non-Community 5,200
SO. CAL. LOGISTICS AIRPORT - INACTIVE CA3601138 California Non-Transient Non-Community 5,200
REDWOOD VALLEY COUNTY WATER DISTRICT CA2310008 California Community 5,200
CLM - HOBO CAMPGROUND CA1502573 California Transient Non-Community 5,200
CCWD - COPPER COVE CA0510017 California Community 5,187
CITY OF BUELLTON WATER DIVISION CA4210018 California Community 5,161
WASCO ST. PRISON RECEPTION CTR CA1510801 California Community 5,124
CALIFORNIA STATE PRISON - SOLANO CA4810800 California Community 5,100
MATHER FIELD WATER SYSTEM CA3410706 California Non-Transient Non-Community 5,100
COSUMNES RIVER COLLEGE CA3400279 California Transient Non-Community 5,100
DENAIR COMMUNITY SERVICES DISTRICT CA5010021 California Community 5,090
PLACER COUNTY WATER AGENCY CA3110027 California Community 5,045
SARDINE LAKE RESORT CA4600094 California Transient Non-Community 5,040
JOE'S TRAVEL PLAZA (EH) CA5000202 California Non-Transient Non-Community 5,026
WILLOW SPRINGS RACEWAY CA1502223 California Transient Non-Community 5,022
CITY OF JACKSON CA0310001 California Community 5,019
SOUTHERN CALIF WATER CO CA3610104 California Community 5,015
DEL ESTE WATER CO-1A CA5010025 California Community 5,005
PLEASANT VALLEY MUTUAL WATER CO CA5610008 California Community 5,000
TURLOCK SAFETY ROADSIDE REST CA5000128 California Transient Non-Community 5,000