EFFIGY MOUNDS NATIONAL MONUMENT
PWS ID: IA2258494 · HARPERS FERRY, Iowa 52146
Population Served
328
Total Violations
43
Health-Based Violations
34
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- Federal
- Connections
- 5
- County
- Clayton
- School/Daycare
- No
- MCL Violations
- 34
- Monitoring Violations
- 7
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 34 | 2001 |
| Revised Total Coliform Rule | MON | 4 | 2019 |
| Nitrate | MR | 3 | 2001 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.