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.
| System Name | PWSID | State | Type | Population Served |
|---|---|---|---|---|
| RIVERNOOK CAMPGROUND | CA1500481 | California | Community | 877 |
| MADISON SERVICE DIST | CA5700571 | California | Community | 876 |
| ALPAUGH COMMUNITY SERVICES DISTRICT | CA5410050 | California | Community | 871 |
| DESCANSO COMMUNITY WATER DISTRICT | CA3710009 | California | Community | 870 |
| CALIFORNIA PINES C.S.D. | CA2500503 | California | Community | 862 |
| VENTURA SCHOOL | CA0000311 | California | Community | 862 |
| YOSEMITE HIGH SCHOOL | CA2000567 | California | Non-Transient Non-Community | 862 |
| LIBERTY -YERMO | CA3610118 | California | Community | 861 |
| MESA ELEMENTARY SCHOOL | CA5000584 | California | Non-Transient Non-Community | 860 |
| JUNIPER RIVIERA CWD | CA3600222 | California | Community | 858 |
| TULELAKE, CITY OF | CA4710010 | California | Community | 856 |
| DRY CREEK ELEMENTARY SCHOOL | CA1000106 | California | Non-Transient Non-Community | 855 |
| REFUGIO STATE BEACH | CA4210303 | California | Transient Non-Community | 855 |
| MCKINNEY WATER DISTRICT | CA3110022 | California | Community | 853 |
| FORKS RESORT | CA2000251 | California | Transient Non-Community | 853 |
| SAN JOAQUIN COUNTY - WILKINSON MANOR | CA3910024 | California | Community | 851 |
| VALLEY CHILDREN S HOSPITAL | CA1000237 | California | Non-Transient Non-Community | 850 |
| SANTA ROSA MEMORIAL HOSPITAL | CA4901088 | California | Non-Transient Non-Community | 850 |
| Coyote Valley System | 090600030 | California | Community | 850 |
| SIERRA CEDARS CSD | CA1010052 | California | Community | 850 |
| SUN MET FARM LANDS, LLC | CA1502487 | California | Non-Transient Non-Community | 850 |
| ROY WILDER | CA1900072 | California | Transient Non-Community | 850 |
| MISSION LAND COMPANY | CA4800824 | California | Non-Transient Non-Community | 850 |
| MENLO COLLEGE | CA4100517 | California | Community | 850 |
| WILLIAM HEISE COUNTY PARK | CA3700072 | California | Transient Non-Community | 850 |
| HILLCREST ESTATES MHP | WI6180285 | California | Community | 850 |
| PATTERSON VEGETABLE COMPANY | CA5000193 | California | Non-Transient Non-Community | 850 |
| HEALTH SERVICES AGENCY WATER SYSTEM | CA5000207 | California | Non-Transient Non-Community | 850 |
| WEST VALLEY HIGH SCHOOL | CA4500214 | California | Non-Transient Non-Community | 850 |
| VENTANA CORPORATION | CA2701287 | California | Transient Non-Community | 850 |
| NPS - DEATH VALLEY, SCOTTY S CASTLE | CA1410506 | California | Transient Non-Community | 850 |
| VICTORY MUTUAL WATER COMPANY | CA1500231 | California | Community | 849 |
| DEER LODGE WATER SYSTEM | CA3600087 | California | Community | 845 |
| LOS PRIETOS COMPLEX | CA4200918 | California | Community | 845 |
| CWS - OAK RANCH | CA5410046 | California | Community | 844 |
| TAHOE CITY PUD - MCKINNEY/QUAIL | CA3110011 | California | Community | 844 |
| OAK SPRINGS VLY WC (CSA 70G) | CA3600186 | California | Community | 840 |
| FIRST MACE MEADOW # 1 | CA0310011 | California | Community | 838 |
| SHAVER LAKE HEIGHTS MWC | CA1010053 | California | Community | 836 |
| CASTELLO DI AMOROSA | CA2800043 | California | Non-Transient Non-Community | 833 |
| OASIS DATE GARDENS | CA3301373 | California | Non-Transient Non-Community | 832 |
| LOLETA C.S.D. | CA1210023 | California | Community | 828 |
| MHC TT INC. (DBA PIO PICO) | CA3702104 | California | Community | 828 |
| CAMANCHE SOUTH SHORE-EBMUD | CA0510012 | California | Community | 828 |
| TUD-APPLE VALLEY ESTATES | CA5510028 | California | Community | 826 |
| LOWER RUSH CREEK CAMPGROUND | CA2500304 | California | Transient Non-Community | 825 |
| 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 |
| RIO SCHOOL DIST/RIO DEL VALLE SCHOOL | CA5602406 | California | Non-Transient Non-Community | 820 |