ONAWAY, CITY OF
PWS ID: MI0005010 · ONAWAY, Michigan 49765
Population Served
880
Total Violations
48
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 510
- County
- Presque Isle
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 32
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MR | 13 | 2018 |
| TTHM | MR | 9 | 2015 |
| Revised Total Coliform Rule | RPT | 7 | 2024 |
| Consumer Confidence Rule | Other | 3 | 2008 |
| Combined Uranium | MR | 3 | 2016 |
| Lead and Copper Rule | MR | 3 | 2019 |
| Chlorine | MR | 3 | 2018 |
| Nitrate | MR | 1 | 1999 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.