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
DEL SUR SCHOOL/WESTSIDE UNION DISTRICT CA1900750 California Non-Transient Non-Community 825
SACRAMENTO NAT. WILDLIFE REFUGE CA1100250 California Transient Non-Community 824
SIERRA LAKES COUNTY WATER DIST CA3110017 California Community 824
ERICSON ELEMENTARY SCHOOL CA1000274 California Non-Transient Non-Community 820
RIO SCHOOL DIST/RIO DEL VALLE SCHOOL CA5602406 California Non-Transient Non-Community 820
LIBERTY ELEMENTARY SCHOOL CA5403146 California Non-Transient Non-Community 818
LACSD - RIMFOREST CA3610045 California Community 817
ADVENTIST HEALTH - ST. HELENA HOSPITAL CA2800625 California Community 817
PARK WATER CO CA1910118 California Community 816
WESTERN VALLEY MEAT COMPANY CA1000461 California Non-Transient Non-Community 815
CENTRAL VALLEY MEAT CO INC CA1600050 California Non-Transient Non-Community 812
APPLE VALLEY FOOTHILL CWD CA3600008 California Community 811
TRANQUILLITY IRRIGATION DISTRICT CA1010030 California Community 807
CANON MANOR WATER SYSTEM CA4910022 California Community 805
USFS-JACKSON LAKE V-4 CA1900583 California Transient Non-Community 805
HARRY V SLACK DWS CA3310023 California Community 805
SILVER TIP CAMPGROUND CA0202539 California Transient Non-Community 805
HOUSTON AVE COMPLEX CA5400847 California Transient Non-Community 804
MUSD-NILE GARDEN SCHOOL CA3901169 California Non-Transient Non-Community 804
RESORT IMPROVEMENT DISTRICT #1 CA1210022 California Community 803
CSP-J.P. BURNS PARK CA2710302 California Transient Non-Community 802
Nixon 093200168 California Community 800
RUSHVILLE COUNTY MARKET IL3138156 California Transient Non-Community 800
JOHN LATORACCA CORRECTIONAL FACILITY CA2400172 California Community 800
USN SAN CLEMENTE ISLAND CA3710707 California Non-Transient Non-Community 800
FAWN & STONEY CR CAMPGROUNDS CA5300070 California Transient Non-Community 800
RANCHO SANTA TERESA CA4300772 California Community 800
SHERMAN IND HI SCHL 090500069 California Community 800
SOUTH YUBA RIVER STATE PARK CA2905001 California Transient Non-Community 800
PLUMAS-EUREKA S.P. CA3210300 California Transient Non-Community 800
WINDSOR IMMERSION SCHOOL CA4900868 California Non-Transient Non-Community 800
San Bernardino KOA (Cable Canyon) CA3600387 California Non-Transient Non-Community 800
HIGHLANDS MOBILE HOME CA1400028 California Community 800
LIBBY OWENS FORD CA3900812 California Transient Non-Community 800
SHIP ASHORE RESORT CA0800607 California Community 800
SAN PASQUAL SCHOOL CA1300565 California Non-Transient Non-Community 800
SENIOR CANYON MUTUAL WATER CO CA5601117 California Community 800
NORTH COUNTY HI SCH WS***CLOSED*** CA2701721 California Non-Transient Non-Community 800
KLAMATH TRINITY U S D CA1200742 California Transient Non-Community 800
VALLES PRODUCE MARKET IL3132068 California Transient Non-Community 800
NEVADA IRRIGATION DISTRICT CA2910022 California Community 800
1000 TRAILS / SOLEDAD CANYON PRESERVE CA1900045 California Transient Non-Community 800
DELAWARE NORTH PARKS SERVICES AT TENAYA CA2210003 California Non-Transient Non-Community 800
BURTON SCHOOL CA5400560 California Non-Transient Non-Community 800
ESCALON USD-ESCALON HIGH SCH CA3901168 California Non-Transient Non-Community 800
SOUTH DOS PALOS COUNTY WTR DT. CA2410014 California Community 800
MONROE/LEINBERGER CNTR - WATERS CA5700797 California Community 800
HERMISTON FUEL & GO OR4195207 California Transient Non-Community 800
EAST BAY REGIONAL PARK DIST CA0707618 California Transient Non-Community 800
CHICO GRANGE #486 CA0409184 California Transient Non-Community 800