DIABLO WATER DISTRICT
Community Water System · California · OAKLEY
PWSID: CA0710007
Compliant
Population Served
43.4K
Service Connections
13.6K
Total Violations
0
Health-Based Violations
0
Lead & Copper Data
Lead Level
Caution1.90 ppb
Action Level: 15 ppb (EPA) · Sampled: 2022-12-31
015 ppb action level
Copper Level
No copper sampling data available
System Details
- Water Source
- Purchased Surface Water
- System Type
- Community Water System
- City
- OAKLEY
- ZIP Code
- 94561
- Counties Served
- Contra Costa
- Cities Served
- Oakley
- Open Violations
- 0
- State
- California
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: CA0710007.SafeWater Home