Lake Mills Wastewater Treatment Facility
Lake Mills, WI · Jefferson County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 1.02 MGD
- NPDES permit
- WI0031194
- Expired
- Permit expires
- September 2021
- Population served
- 7,376
- CWNS 2022
Lake Mills Wastewater Treatment Facility is a publicly owned wastewater treatment works in Lake Mills, Jefferson County, Wisconsin, serving about 7,376 residents. Treatment on site includes carrousels / oxidation ditches, biogas balloons. It discharges under NPDES permit WI0031194 (expired), which expires in September 2021, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Lake Mills Wastewater Treatment Facility.
No verified contacts on file yet
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Nearby wastewater treatment plants in Wisconsin
Cambridge · 7 mi away
0.34 MGD
Jefferson · 8 mi away
1.06 MGD
Deerfield · 9 mi away
0.23 MGD
Marshall · 10 mi away
0.37 MGD
Watertown · 10 mi away
2.81 MGD
Rockdale · 10 mi away
0.01 MGD
Fort Atkinson · 12 mi away
—
Ixonia · 16 mi away
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Lake Mills Wastewater Treatment Facility: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated March 5, 2025.