MALLARD WATER SUPPLY
PWS ID: IA7450019 · MALLARD, Iowa 50562
Population Served
257
Total Violations
224
Health-Based Violations
184
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 163
- County
- Palo Alto
- School/Daycare
- No
- MCL Violations
- 184
- Monitoring Violations
- 17
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Arsenic | MCL | 184 | 2024 |
| Nitrate | MR | 5 | 1985 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2016 |
| TTHM | MR | 4 | 2016 |
| Arsenic | MR | 4 | 2019 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.