LAKE DON PEDRO CSD
PWS ID: CA5510008 · LA GRANGE, California 95329
Population Served
3,240
Total Violations
58
Health-Based Violations
33
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 1,534
- County
- Tuolumne
- School/Daycare
- No
- MCL Violations
- 32
- Monitoring Violations
- 18
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 18 | 2009 |
| Total Haloacetic Acids (HAA5) | MCL | 14 | 2007 |
| TTHM | MR | 6 | 2006 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2006 |
| Lead and Copper Rule | MR | 2 | 2017 |
| Revised Total Coliform Rule | MON | 2 | 2025 |
| Nitrate | MR | 2 | 2024 |
| 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.