Larsen Winchester Sd WW Trtmnt
Winchester, WI · Winnebago County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.05 MGD
- NPDES permit
- WI0031925
- Expired
- Permit expires
- September 2022
- Population served
- 777
- CWNS 2022
Larsen Winchester Sd WW Trtmnt is a publicly owned wastewater treatment plant in Winchester, Winnebago County, Wisconsin, serving about 777 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit WI0031925 (expired), which expires in September 2022, 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 Larsen Winchester Sd WW Trtmnt.
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Winneconne · 9 mi away
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Hortonville · 10 mi away
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Fremont · 12 mi away
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Larsen Winchester Sd WW Trtmnt: 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 November 6, 2025.