WI DNR MILL BLUFF BEACH
PWS ID: WI6420335 · Ontario, Wisconsin 54651
Population Served
125
Total Violations
51
Health-Based Violations
20
Water Source
Groundwater
System Details
- System Type
- Transient Non-Community
- Owner Type
- State
- Connections
- 1
- County
- Monroe
- School/Daycare
- No
- MCL Violations
- 20
- Monitoring Violations
- 25
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 20 | 2012 |
| Coliform (TCR) | MR | 10 | 2009 |
| Revised Total Coliform Rule | MON | 8 | 2019 |
| Nitrate | MR | 7 | 2005 |
| Revised Total Coliform Rule | RPT | 4 | 2023 |
| Public Notice | Other | 2 | 2012 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.