WEST VALLEY WATER DISTRICT
California — Community Water System — PWSID: CA3610004
System Information
| PWSID | CA3610004 |
| System Name | WEST VALLEY WATER DISTRICT |
| System Type | Community Water System |
| Water Source | Surface Water |
| 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 | RIALTO |
| ZIP Code | 92377 |
| Address | 855 W. BASELINE RD |
| Organization | THIEL, JOHN |
| Phone | 909-875-3706 |
Population & Service
| Population Served | 104,498 |
| Service Connections | 23,436 |
Drinking Water Violations (19)
This water system has 19 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2013 | Dec 31, 2013 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2013 | Dec 31, 2013 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2013 | — | |
| Oct 1, 2012 | — | MR | No | No | — | TT | — | Resolved | Mar 1, 2018 | — | |
| Oct 1, 2012 | — | MR | No | No | — | TT | — | Resolved | Mar 1, 2018 | — | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Jan 1, 2012 | Dec 31, 2012 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2012 | — | |
| Jun 1, 1987 | Jun 30, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | Jun 30, 1987 | — | |
| Jun 1, 1987 | Jun 30, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | Jun 30, 1987 | — | |
| Jun 1, 1987 | Jun 30, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | Jun 30, 1987 | — | |
| Jun 1, 1987 | Jun 30, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | Jun 30, 1987 | — | |
| May 1, 1987 | May 31, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | May 31, 1987 | — | |
| May 1, 1987 | May 31, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | May 31, 1987 | — | |
| May 1, 1987 | May 31, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | May 31, 1987 | — | |
| May 1, 1987 | May 31, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | May 31, 1987 | — | |
| Apr 1, 1987 | Apr 30, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | Apr 30, 1987 | — | |
| Apr 1, 1987 | Apr 30, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | Apr 30, 1987 | — | |
| Apr 1, 1987 | Apr 30, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | Apr 30, 1987 | — | |
| Apr 1, 1987 | Apr 30, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | Apr 30, 1987 | — | |
| Mar 1, 1987 | Mar 31, 1987 | MCL | Yes | No | — | 10 mg/L | — | Archived | Mar 31, 1987 | — |
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.