OTTER LAKE WATER COMMISSION
PWS ID: IL1175200 · VIRDEN, Illinois 62690
Population Served
1,318
Total Violations
71
Health-Based Violations
55
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 527
- County
- Macoupin
- School/Daycare
- No
- MCL Violations
- 39
- Monitoring Violations
- 16
- Treatment Tech Violations
- 16
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Atrazine | MCL | 26 | 1994 |
| TTHM | MCL | 13 | 1986 |
| Interim Enhanced Surface Water Treatment Rule | TT | 8 | 2010 |
| Coliform (TCR) | MR | 7 | 1994 |
| Surface Water Treatment Rule | TT | 6 | 1994 |
| Nitrite | MR | 4 | 2013 |
| Nitrate | MR | 4 | 2013 |
| Lead and Copper Rule | TT | 2 | 1995 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.