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
TEMPERANCE-KUTNER SCHOOL CA1000197 California Transient Non-Community 650
FRANKLIN ELEMENTARY SCHOOL CA3400248 California Non-Transient Non-Community 650
EL PASO DE ROBLES SCHOOL CA7300319 California Community 647
PINNACLES NATIONAL PARK CAMPGROUND CA3510502 California Transient Non-Community 647
EL PASO DE ROBLES SCHOOL CA0000319 California Community 647
Andrade Border Station 090400678 California Non-Transient Non-Community 647
PLEASANTIMES MUTUAL WATER CO CA0707576 California Community 644
COUNTY SERVICE AREA 11 CA4100582 California Community 642
TUD - MONO VILLAGE WATER SYSTEM CA5510019 California Community 640
DIAMOND A MUTUAL WATER COMPANY CA4900562 California Community 640
NAF EL CENTRO CA1310700 California Community 637
HEMLOCK MUTUAL WATER COMPANY CA1900714 California Community 636
ORLEANS C.S.D. CA1200729 California Community 636
YOSEMITE NPS-EL PORTAL CA2210515 California Community 635
MINERAL COUNTY WATER DISTRICT CA5200503 California Community 634
SOUTH SAN BERNARDINO WATER DST CA3610102 California Community 633
TRADEWIND WATER ASSOC. CA1500406 California Community 632
LOLETA W W CA1200580 California Community 630
IVCSD-GREENVILLE CA3210001 California Community 630
LODI USD-DAVIS SCHOOL CA3901085 California Non-Transient Non-Community 630
NEWELL COUNTY WATER DISTRICT CA2500801 California Community 629
SAN MARTIN COUNTY WATER DISTRICT CA4300542 California Community 627
MP MINE OPERATIONS LLC CA3600172 California Community 626
GERBER UNION ELEMENTARY SCHOOL DISTRICT CA5200519 California Non-Transient Non-Community 625
LAKE ALPINE WATER COMPANY CA0210001 California Community 625
KENWOOD VILLAGE WATER COMPANY CA4900534 California Community 625
CREST PUBLIC UTILITY DIST CA3710003 California Community 624
ARCTIC COLD CA4200983 California Non-Transient Non-Community 623
MT. MADONNA COUNTY PARK CA4300612 California Transient Non-Community 621
CWSC COUNTRY MEADOWS CA2701929 California Community 621
MOONLIGHT PACKING CO. LLC - PLANT 8 CA1000671 California Transient Non-Community 620
NEPENTHE WS CA2701280 California Community 618
HOWARD ELEMENTARY SCHOOL CA2000600 California Non-Transient Non-Community 618
PLAINVIEW MUTUAL WATER COMPANY CA5410039 California Community 617
LITTLE BEAR WATER COMPANY CA2700630 California Community 616
Point Arena Rancheria 090600145 California Community 616
DUCOR CSD CA5400542 California Community 616
SANTA NELLA COUNTY WATER DISTRICT CA2410017 California Community 615
TROUT GULCH MUTUAL WATER COMPANY CA4400502 California Community 614
CSA 62 CA3301577 California Community 614
LOS ANGELES CWWD 40, REG. 35-N.E. L.A. CA1910027 California Community 612
USFS CLARK FORK CAMPD CA5500176 California Transient Non-Community 612
RIVERLAND RESORT CA3600365 California Transient Non-Community 611
CSA 70 W-3 HACIENDA CA3600114 California Community 611
CSP-ARMSTRONG REDWOODS STATE RESERVE CA4910306 California Transient Non-Community 611
RIVERDALE PARK TRACT CSD CA5000019 California Community 610
LASSEN VNP - MANZANITA LAKE CA5210505 California Transient Non-Community 606
BITNEY SPRINGS CENTER WATER SYSTEM CA2900563 California Non-Transient Non-Community 606
LUCERNE VALLEY HIGH SCHOOL CA3601095 California Non-Transient Non-Community 606
RIO BRAVO SCHOOL WATER SYSTEM CA1500229 California Non-Transient Non-Community 605