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 |
|---|---|---|---|---|
| FORESTVILLE WATER DISTRICT | CA4910019 | California | Community | 3,788 |
| AMERICAN VALLEY CSD | CA3210004 | California | Community | 3,778 |
| IDYLLWILD WATER DISTRICT | CA3310019 | California | Community | 3,762 |
| WEST SACRAMENTO, CITY OF | CA5710002 | California | Community | 3,750 |
| HUNTER HILL SAFETY ROADSIDE REST AREA | CA4800781 | California | Transient Non-Community | 3,707 |
| CAL AM - OAKHURST | CA2010007 | California | Community | 3,693 |
| MT. SHASTA, CITY OF | CA4710008 | California | Community | 3,642 |
| BROOKTRAILS TOWNSHIP CSD | CA2310009 | California | Community | 3,632 |
| GROSSO KRESSER WINERY | CA4000854 | California | Transient Non-Community | 3,606 |
| BLACKBERRY FARMS | CA4300751 | California | Transient Non-Community | 3,600 |
| MISSION HILLS CSD | CA4210019 | California | Community | 3,600 |
| CAMPTON HEIGHTS WATER SERVICE | CA1210003 | California | Community | 3,600 |
| ESPARTO C.S.D. | CA5710007 | California | Community | 3,574 |
| LOCKEFORD COMMUNITY SERV. DIST. | CA3910008 | California | Community | 3,572 |
| CDCR - SIERRA CONSERVATION CENTER | CA5510851 | California | Community | 3,571 |
| BANDY CANYON RANCH CORP | CA3705075 | California | Transient Non-Community | 3,564 |
| JACKSON VALLEY IRRIGATION DISTRICT | CA0300037 | California | Community | 3,553 |
| COBB AREA COUNTY WATER DISTRICT | CA1710012 | California | Community | 3,515 |
| CSP-SALT POINT STATE PARK | CA4910310 | California | Transient Non-Community | 3,513 |
| CSP-FORT ROSS STATE PARK | CA4910309 | California | Transient Non-Community | 3,501 |
| YUBA COMMUNITY COLLEGE DIST. | CA5800830 | California | Non-Transient Non-Community | 3,500 |
| MT. SHASTA SKI PARK | CA4700863 | California | Transient Non-Community | 3,500 |
| CALTRANS-LAKEHEAD SRRA | CA4500285 | California | Transient Non-Community | 3,500 |
| PRESIDIO OF SAN FRANCISCO | CA3810700 | California | Community | 3,500 |
| SHADY COVE | CA3601166 | California | Transient Non-Community | 3,500 |
| MODOC DISTRICT FAIR | CA2500564 | California | Transient Non-Community | 3,500 |
| YOSEMITE NPS-MARIPOSA GROVE | CA2010500 | California | Transient Non-Community | 3,500 |
| PARK WATER CO SYS NO 50E | CA1910184 | California | Community | 3,500 |
| CAL STATE BAKERSFIELD | CA1500545 | California | Community | 3,500 |
| BEAR VALLEY MOUNTAIN RESORT | CA0202549 | California | Transient Non-Community | 3,500 |
| Hoopa Valley-Wide System | 090605126 | California | Community | 3,500 |
| BAKERSFIELD HIGH SCHOOL WATER | CA1502305 | California | Non-Transient Non-Community | 3,498 |
| Colusa Southern System | 090605047 | California | Community | 3,474 |
| EAST ORANGE COUNTY WD - RZ | CA3010068 | California | Community | 3,464 |
| BORREGO WD | CA3710036 | California | Community | 3,429 |
| DWP - SUGARLOAF/ERWIN LAKE | CA3610061 | California | Community | 3,422 |
| CITY OF BRISBANE | CA4110002 | California | Community | 3,402 |
| CALIF REHABILITATION CENTER | CA7300107 | California | Community | 3,400 |
| GROVELAND COMMUNITY SERV DIST | CA5510009 | California | Community | 3,400 |
| CALIFORNIA REHABILITATION CENT | CA0000107 | California | Community | 3,400 |
| BOX SPRINGS MUTUAL WC | CA3310004 | California | Community | 3,382 |
| TAHOE CITY PUD - TAHOE SWISS VILLAGE | CA3110042 | California | Community | 3,363 |
| EL DORADO IRRIGATION DISTRICT | CA0910016 | California | Community | 3,353 |
| RIO ALTO WATER DISTRICT | CA5210005 | California | Community | 3,329 |
| PORTERVILLE STATE HOSPITAL | CA0000201 | California | Community | 3,325 |
| FOLSOM, CITY OF - ASHLAND | CA3410030 | California | Community | 3,317 |
| COTTONWOOD WATER DISTRICT | CA4510007 | California | Community | 3,316 |
| SAN BENITO HIGH SCHOOL | CA3500571 | California | Non-Transient Non-Community | 3,310 |
| GIBSON RANCH COUNTY PARK | CA3400297 | California | Transient Non-Community | 3,300 |
| MWDOC-SOUTH ORANGE COUNTY OCEAN DESAL | CA3010121 | California | Community | 3,300 |