WALNUT VALLEY WATER DISTRICT
California — Community Water System — PWSID: CA1910234
System Information
| PWSID | CA1910234 |
| System Name | WALNUT VALLEY WATER DISTRICT |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | WALNUT |
| ZIP Code | 91789 |
| Address | 271 SOUTH BREA CANYON ROAD |
| Organization | SHAW, SHERRY |
| Phone | 909-595-1268 |
Population & Service
| Population Served | 100,941 |
| Service Connections | 27,201 |
Drinking Water Violations (5)
This water system has 5 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 1, 1994 | Sep 30, 1994 | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 1994 | — | |
| Sep 1, 1994 | Sep 30, 1994 | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 1994 | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.