Windsor Southwest WWTF
1133 A NE Y Hwy, Windsor, MO 65360 · Henry County · Publicly Owned Treatment Works
- Average flow
- 0.37 MGD
- Design flow
- —
- NPDES permit
- MO0047325
- Administratively continued
- Permit expires
- March 2026
- Population served
- 1,803
- CWNS 2022
Windsor Southwest WWTF is a publicly owned wastewater treatment works in Windsor, Henry County, Missouri treating an average of 0.37 million gallons per day, serving about 1,803 residents. It discharges under NPDES permit MO0047325 (administratively continued), which expires in March 2026, with 73 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified, 2 planned upgrades on record at Windsor Southwest WWTF.
Available with a free Klarifi account
See the full treatment train at Windsor Southwest WWTF: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 73
- Effluent violations
- 51
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Windsor Southwest WWTF.
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Nearby wastewater treatment plants in Missouri
Calhoun · 5 mi away
0.03 MGD
Leeton · 10 mi away
0.09 MGD
Green Ridge · 10 mi away
0.03 MGD
Ionia · 12 mi away
0.0036 MGD
Clinton · 16 mi away
1.32 MGD
Cole Camp · 17 mi away
0.2 MGD
Knob Noster · 18 mi away
0.34 MGD
La Monte · 19 mi away
0.04 MGD
Windsor Southwest WWTF: 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 12, 2026; facility record last updated September 6, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms