LEROY SANITARY DISTRICT 1
PWS ID: WI1140155 · MAYVILLE, Wisconsin 53050
Population Served
320
Total Violations
131
Health-Based Violations
57
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 118
- County
- Dodge
- School/Daycare
- No
- MCL Violations
- 45
- Monitoring Violations
- 56
- Treatment Tech Violations
- 12
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 33 | 2014 |
| Coliform (TCR) | MR | 16 | 2011 |
| Groundwater Rule | TT | 12 | 2019 |
| Combined Radium (-226 and -228) | MCL | 12 | 2024 |
| Lead and Copper Rule | MR | 6 | 2012 |
| Consumer Confidence Rule | Other | 4 | 2000 |
| Public Notice | Other | 4 | 2024 |
| Chlorine | MR | 4 | 2011 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2015 |
| TTHM | MR | 4 | 2015 |
| Groundwater Rule | Other | 2 | 2024 |
| cis-1,2-Dichloroethylene | MR | 1 | 1993 |
| Xylenes, Total | MR | 1 | 1993 |
| DICHLOROMETHANE | MR | 1 | 1993 |
| Vinyl chloride | MR | 1 | 1993 |
| 1,1-Dichloroethylene | MR | 1 | 1993 |
| 1,1,1-Trichloroethane | MR | 1 | 1993 |
| 1,2-Dichloropropane | MR | 1 | 1993 |
| Trichloroethylene | MR | 1 | 1993 |
| Tetrachloroethylene | MR | 1 | 1993 |
| Toluene | MR | 1 | 1993 |
| Ethylbenzene | MR | 1 | 1993 |
| Styrene | MR | 1 | 1993 |
| Nitrate | MR | 1 | 1993 |
| Carbon tetrachloride | MR | 1 | 1993 |
| Benzene | MR | 1 | 1993 |
| 1,2-Dichloroethane | MR | 1 | 1993 |
| 1,2,4-Trichlorobenzene | MR | 1 | 1993 |
| CHLOROBENZENE | MR | 1 | 1993 |
| o-Dichlorobenzene | MR | 1 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.