SONOMA, CITY OF
Community Water System · California · SONOMA
PWSID: CA4910012
Has Violations
Population Served
11.7K
Service Connections
4.3K
Total Violations
17
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
1500 ppb
Action Level: 1,300 ppb (EPA) · Sampled: 1993-01-31
Copper action level exceeded
System Details
- Water Source
- Groundwater
- System Type
- Community Water System
- City
- SONOMA
- ZIP Code
- 95476
- Counties Served
- Sonoma
- Cities Served
- SONOMA
- Open Violations
- 0
- State
- California
Violation Summary
17
Total Violations
2
Health-Based
0
Open Now
Most recent violation: 2025-07-02
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Data source: EPA ECHO SDWIS Bulk Download (Jan 2026). PWSID: CA4910012.SafeWater Home