GSWC-SAN DIMAS
California — Community Water System — PWSID: CA1910142
System Information
| PWSID | CA1910142 |
| System Name | GSWC-SAN DIMAS |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | California |
| City | SAN DIMAS |
| ZIP Code | 91773 |
| Address | 401 S. San Dimas Canyon Road |
| Organization | ZAKHARI, GEORGE |
| Phone | 760-515-8322 |
Population & Service
| Population Served | 56,538 |
| Service Connections | 16,163 |
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, 1997 | Sep 30, 1997 | Nitrate | MCL | Yes | No | 46 MG/L | 10 mg/L | 45 | Resolved | Sep 30, 1997 | Nitrate Rule |
| Sep 1, 1997 | Sep 30, 1997 | Nitrate | MCL | Yes | No | 46 MG/L | 10 mg/L | 45 | Resolved | Sep 30, 1997 | Nitrate Rule |
| Dec 1, 1995 | Dec 31, 1995 | Nitrate | MCL | Yes | No | 53.1 MG/L | 10 mg/L | 45 | Resolved | Dec 31, 1995 | Nitrate Rule |
| Dec 1, 1995 | Dec 31, 1995 | Nitrate | MCL | Yes | No | 53.1 MG/L | 10 mg/L | 45 | Resolved | Dec 31, 1995 | Nitrate Rule |
| Dec 1, 1995 | Dec 31, 1995 | Nitrate | MCL | Yes | No | 53.1 MG/L | 10 mg/L | 45 | Resolved | Dec 31, 1995 | Nitrate Rule |
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.