TUD - UPPER BASIN WATER SYSTEM
Community Water System · California · SONORA
PWSID: CA5510012
WholesalerCompliant
Population Served
13.3K
Service Connections
5.0K
Total Violations
2
Health-Based Violations
2
Lead & Copper Data
Lead Level
Safe0.00 ppb
Action Level: 15 ppb (EPA) · Sampled: 2023-12-31
015 ppb action level
Copper Level
No copper sampling data available
System Details
- Water Source
- Surface Water
- System Type
- Community Water System
- City
- SONORA
- ZIP Code
- 95370
- Counties Served
- Tuolumne
- Cities Served
- Sonora
- Open Violations
- 0
- State
- California
Violation Summary
2
Total Violations
2
Health-Based
0
Open Now
Most recent violation: 1996-12-01
Explore California Water Quality
See all water systems, lead data, and violation trends for California.
Data source: EPA ECHO SDWIS Bulk Download (Jan 2026). PWSID: CA5510012.SafeWater Home