TWIN LAKES RESORT
PWS ID: CA3701793 · POTRERO, California 91963
Population Served
400
Total Violations
69
Health-Based Violations
36
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 153
- County
- San Diego
- School/Daycare
- No
- MCL Violations
- 36
- Monitoring Violations
- 19
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 36 | 2025 |
| Coliform (TCR) | MR | 8 | 2015 |
| Arsenic | MR | 4 | 2024 |
| Lead and Copper Rule | MR | 4 | 2021 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1981 |
| Consumer Confidence Rule | Other | 2 | 2005 |
| Nitrate | MR | 1 | 2023 |
| Public Notice | Other | 1 | 2016 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.