Larsen Winchester Sd WW Trtmnt
PO Box 85, Winchester, WI 54947 · Winnebago County · Publicly Owned Treatment Works
- Average flow
- 0.13 MGD
- 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 treating an average of 0.13 million gallons per day against a permitted design capacity of 0.05 MGD, serving about 777 residents. It discharges under NPDES permit WI0031925 (expired), which expires in September 2022, with 0 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Larsen Winchester Sd WW Trtmnt.
Available with a free Klarifi account
See the full treatment train at Larsen Winchester Sd WW Trtmnt: structures, unit processes and planned upgrades, with exact unit counts.
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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Nearby wastewater treatment plants in Wisconsin
Oshkosh · 6 mi away
0.06 MGD
Dale · 6 mi away
0.03 MGD
Winneconne · 7 mi away
0.43 MGD
Menasha · 9 mi away
12.33 MGD
Winneconne · 9 mi away
0.04 MGD
Neenah · 9 mi away
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Hortonville · 10 mi away
0.31 MGD
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 October 26, 2026; facility record last updated November 6, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms