IRWIN MUNICIPAL SUPPLY
PWS ID: IA8340099 · IRWIN, Iowa 51446
Population Served
313
Total Violations
52
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 177
- County
- Shelby
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 47
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 24 | 2025 |
| Coliform (TCR) | MR | 15 | 2000 |
| Nitrate | MR | 8 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.