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.
| 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 |