HILLSBORO WATERWORKS
PWS ID: WI6630257 · Hillsboro, Wisconsin 54634
Population Served
1,325
Total Violations
93
Health-Based Violations
55
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 661
- County
- Vernon
- School/Daycare
- No
- MCL Violations
- 21
- Monitoring Violations
- 10
- Treatment Tech Violations
- 34
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 21 | 1998 |
| Groundwater Rule | TT | 20 | 2019 |
| Public Notice | Other | 15 | 2019 |
| Lead and Copper Rule | TT | 14 | 2023 |
| Groundwater Rule | Other | 8 | 2019 |
| Coliform (TCR) | MR | 6 | 2003 |
| Lead and Copper Rule | MR | 4 | 2017 |
| Consumer Confidence Rule | Other | 4 | 2023 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.