DNR - HAYES STATE PARK
PWS ID: MI2012746 · ONSTED, Michigan 49265
Population Served
784
Total Violations
8
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- State
- Connections
- 2
- County
- Lenawee
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 5
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 5 | 2019 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.