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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
SONOMA COAST S.B. BODEGA DUNE CA4910300 California Transient Non-Community 1,561
NPS PRNS - BEACHES CA2110502 California Community 1,560
CALIFORNIA CONSERVATION CENTER CA0000123 California Community 1,550
CALIFORNIA CORRECTIONAL CENTER CA7300123 California Community 1,550
KING CITY HIGH SCHOOL CA2700944 California Non-Transient Non-Community 1,550
UNION INN C/O ORRY GROUPS INTERNATIONAL CA1502384 California Transient Non-Community 1,546
PINE COVE WATER DISTRICT CA3310030 California Community 1,540
FALL RIVER VALLEY CSD CA4510008 California Community 1,535
LOS ALAMOS COMMUNITY SERVICES DISTRICT CA4210002 California Community 1,534
PLUMAS EUREKA CSD CA3210011 California Community 1,534
LAKE COUNTY CSA 2 - SPRING VALLEY CA1710018 California Community 1,531
Bear River/Singley Hill 090605125 California Community 1,530
FLY IN ACRES CA0500017 California Community 1,530
COUNTY OF MONTEREY-LAKE NACIMIENTO CA4000590 California Non-Transient Non-Community 1,521
BUCKINGHAM PARK WATER DISTRICT CA1710011 California Community 1,521
FRESNO COUNTY WATER WORKS CA1010032 California Community 1,519
HUME LAKE CHRISTIAN CAMPS, INC CA1010013 California Community 1,519
WHITE FENCE FARMS MWC NO. 1 CA1910249 California Community 1,518
JULIAN COMMUNITY SERVICES DISTRICT CA3700909 California Community 1,517
PEARSONVILLE WATER SYSTEM CA1400043 California Transient Non-Community 1,515
PARK WATER CO CA1910116 California Community 1,512
LITTLE POTATO SLOUGH MUTUAL CA3910022 California Community 1,510
RICHARDSON GROVE SP-STATE PARKS CA1210307 California Transient Non-Community 1,509
BUTTONWILLOW CWD CA1510011 California Community 1,508
MARIANA RANCHOS CWD CA3610030 California Community 1,502
NOJOQUI FALLS COUNTY PARK CA4200824 California Transient Non-Community 1,502
ROWLAND WTR CO CA5410028 California Community 1,500
Hard Rock Casino Tejon 090600181 California Non-Transient Non-Community 1,500
FIELDS LANDING WATER WORKS CA1210005 California Community 1,500
SOUTH MAIN MUTUAL WTR CO INC CA3010043 California Community 1,500
PALISADES TAHOE 8200 WATER SYSTEM CA3103294 California Non-Transient Non-Community 1,500
AERA ENERGY-LLC CA1500495 California Non-Transient Non-Community 1,500
JOSHUA VALLEY UTILITY COMPANY AZ0408017 California Community 1,500
SPRINGVILLE PUD CA5410011 California Community 1,500
ALBERTS RESTAURANT CA3901119 California Transient Non-Community 1,500
PRATT MUTUAL WATER CO CA5410033 California Community 1,500
SIERRA CONSERVATION CENTER CA0000112 California Community 1,500
PORTERVILLE DEVELOPMENTAL CTR CA7300201 California Community 1,500
LYNWOOD PARK MUTUAL WATER CO. CA1910081 California Community 1,500
ANTLERS SHELL / SUBWAY CA4500215 California Transient Non-Community 1,500
SIERRA CONSERVATION CENTER CA7300112 California Community 1,500
BULLARDS BAR RECREATION AREA CA5800816 California Transient Non-Community 1,500
U.S. ARMY CORPS-LAKE MENDO (KYEN CMPGRD) CA2300854 California Transient Non-Community 1,500
SONOMA DEVELOPMENTAL CENTER CA7300202 California Community 1,500
CATTLEMENS RESTAURANT CA4800697 California Transient Non-Community 1,500
T J MEDEIROS CA3500522 California Transient Non-Community 1,500
DOLE ATWATER PLANT CA2400011 California Non-Transient Non-Community 1,500
BUTANO STATE PARK - TRAIL CMP CA4110317 California Transient Non-Community 1,500
CAL TRANS BUTTONWILLOW SFTY RSRA CA1502029 California Transient Non-Community 1,500
THE COURTYARD WATER SYSTEM CA4300587 California Transient Non-Community 1,500