Browse Water Systems

20,012 public water systems in CA.

Public Water Systems Database

Browse 20,012 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
Ontario Christian School CA3600188 California Non-Transient Non-Community 600
WAINWRIGHT RETREAT CA0500086 California Transient Non-Community 600
CARVER TRACT MUTUAL WATER COMP CA3301107 California Community 600
MORRELL PROPERTY MGT CA0707582 California Community 600
VALLEY SPRING PUBLIC UTILITY D CA0500080 California Community 600
EL MONTE SCHOOL CA5400606 California Transient Non-Community 600
PRESTON SCHOOL OF INDUSTRY CA0000315 California Community 600
SAN FRANCISCO REGIONAL WATER SYSTEM CA3810001 California Community 600
MIDWAY COMMUNITY SERVICES DIST CA2410015 California Community 600
COLLEGE OF SISKIYOU CA4700547 California Non-Transient Non-Community 600
CALTRANS-GRASS LAKE REST STOP CA4700558 California Transient Non-Community 600
FEATHER RIVER COMMUNITY COLLEGE CA3200111 California Non-Transient Non-Community 600
ELKS - TRACY LODGE #2031 BPOE CA3900782 California Transient Non-Community 600
COUNTRY LIFE MH & RV PARK CA1300550 California Community 600
RANCHO SESPE WORKERS IMP ASSOC CA5601144 California Community 600
SAN JOAQUIN RIVER CLUB INC CA3910018 California Community 600
LADDS STOCKTON MARINA WS CA3901143 California Transient Non-Community 600
SYLVAN SCHOOL CA5000181 California Transient Non-Community 600
MECKS WHISPERING PINES II LLC IN5243033 California Community 598
COROMAR MUTUAL WATER CO CA4200670 California Transient Non-Community 597
WATERFORD - HICKMAN CA5010026 California Community 597
LIME SADDLE COMMUNITY CA0400075 California Community 597
MADISON ELEMENTARY SCHOOL CA1000105 California Non-Transient Non-Community 597
CEDAR GROVE MOBILE HOME PARK TX0500043 California Community 595
COBB AREA CWD - BONANZA SPRINGS CA1700544 California Community 594
WHISKEYTOWN NRA-HEADQUARTERS CA4510506 California Non-Transient Non-Community 594
DWR-MONUMENT HILL RESTROOMS CA0405002 California Transient Non-Community 593
EBRPD - SHADOW CLIFFS REGIONAL PARK CA0105011 California Transient Non-Community 593
S & T MUTUAL WATER COMPANY CA4000523 California Community 591
LAKE COUNTY CSA 6 - FINLEY CA1710019 California Community 590
LOST HILLS WATER COMPANY CA1500167 California Community 590
BONITA SCHOOL CA4200833 California Non-Transient Non-Community 589
ROYAL OAKS SCHOOL CA5400854 California Non-Transient Non-Community 587
HAEHL STREET WATER SYSTEM CA2300733 California Community 587
GOLDEN STATE WATER CO - LUCERNE CA3610108 California Community 586
CSP-PFEIFFER BIG SUR CA2710300 California Community 585
CARMEL RIVIERA MWC CA2701254 California Community 584
COSTANOA CAMPGROUND CA4100603 California Non-Transient Non-Community 583
STINSON BEACH COUNTY WTR DIST CA2110004 California Community 583
HMC GROUP COLD STORAGE CA1000440 California Non-Transient Non-Community 580
SNP-CRESCENT MEADOW CA5410505 California Transient Non-Community 580
ROOSEVELT ELEMENTARY SCHOOL CA1000208 California Non-Transient Non-Community 580
ECHO VALLEY SCHOOL WS CA2700552 California Non-Transient Non-Community 579
MENDOCINO SCHOOL DISTRICT- MENDOCINO CA2300584 California Non-Transient Non-Community 579
SEVENTH DAY ADVENTIST CAMP CA4400726 California Transient Non-Community 578
MOUNT LAGUNA IMPROVEMENT ASSN. CA3702283 California Non-Transient Non-Community 578
SHERWOOD FOREST MHP PWS OH1901112 California Community 578
OAK GLEN RETREAT CA3600133 California Community 576
MOSS LANDING SCHOOL WS **CLOSED** CA2700598 California Non-Transient Non-Community 575
SAN ARDO WD CA2700728 California Community 575