ONSLOW WATER SUPPLY
PWS ID: IA5358096 · WYOMING, Iowa 52362
Population Served
201
Total Violations
123
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 110
- County
- Jones
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 67
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 19 | 2022 |
| Consumer Confidence Rule | Other | 14 | 2019 |
| Lead and Copper Rule | MR | 13 | 2012 |
| Selenium | MR | 6 | 1987 |
| Fluoride | MR | 5 | 1987 |
| Arsenic | MR | 3 | 1987 |
| Mercury | MR | 3 | 1987 |
| 1,2,4-Trichlorobenzene | MR | 3 | 1996 |
| BHC-GAMMA | MR | 3 | 1995 |
| Barium | MR | 3 | 1987 |
| Chromium | MR | 3 | 1987 |
| Coliform (TCR) | MR | 3 | 2002 |
| Cadmium | MR | 3 | 1987 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.