TUD - UPPER BASIN WATER SYSTEM
California — Community Water System — PWSID: CA5510012
System Information
| PWSID | CA5510012 |
| System Name | TUD - UPPER BASIN WATER SYSTEM |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Mar 22, 1979 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | California |
| City | SONORA |
| ZIP Code | 95370 |
| Address | 18885 Nugget Blvd. |
| Organization | HALL, ERIC |
| Phone | 209-532-5536 |
Population & Service
| Population Served | 13,280 |
| Service Connections | 4,991 |
Drinking Water Violations (2)
This water system has 2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec 1, 1996 | Dec 31, 1996 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Dec 31, 1996 | Surface Water Treatment Rule |
| Dec 1, 1996 | Dec 31, 1996 | Surface Water Treatment Rule | TT | Yes | No | — | — | — | Resolved | Dec 31, 1996 | Surface Water Treatment 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.