CLEARLAKE OAKS COUNTY WATER DISTRICT
PWS ID: CA1710001 · CLEARLAKE OAK, California 95423
Population Served
2,359
Total Violations
21
Health-Based Violations
8
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 2,161
- County
- Lake
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 11
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 7 | 2019 |
| TTHM | MCL | 6 | 2023 |
| Surface Water Treatment Rule | TT | 2 | 2006 |
| Nitrate | MR | 2 | 2019 |
| Surface Water Treatment Rule | MR | 2 | 2017 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.