OAKLEY MUTUAL WATER COMPANY
PWS ID: CA0706004 · OAKLEY, California 94561
Population Served
170
Total Violations
19
Health-Based Violations
14
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 50
- County
- Contra Costa
- School/Daycare
- No
- MCL Violations
- 13
- Monitoring Violations
- 4
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 13 | 2024 |
| Coliform (TCR) | MR | 2 | 2008 |
| Nitrite | MR | 2 | 2013 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.