MCCALLSBURG WATER SUPPLY
PWS ID: IA8552010 · COLO, Iowa 50065
Population Served
353
Total Violations
74
Health-Based Violations
3
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 147
- County
- Story
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 53
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 16 | 2010 |
| TTHM | MR | 8 | 2019 |
| Total Haloacetic Acids (HAA5) | MR | 8 | 2019 |
| Public Notice | Other | 6 | 2020 |
| Nitrate | MR | 5 | 1984 |
| Chlorine | MR | 4 | 2010 |
| Fluoride | MCL | 3 | 1983 |
| Barium | MR | 2 | 1987 |
| Mercury | MR | 2 | 1987 |
| Chromium | MR | 2 | 1987 |
| Cadmium | MR | 2 | 1987 |
| Arsenic | MR | 1 | 1987 |
| Fluoride | MR | 1 | 1987 |
| Lead and Copper Rule | MR | 1 | 1990 |
| Selenium | MR | 1 | 1987 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.