Windham Wastewater Treatment Plant
Windham, NY · Greene County · Publicly Owned Treatment Works
- Average flow
- 0.16 MGD
- Design flow
- 0.45 MGD
- NPDES permit
- NY0262935
- Effective
- Permit expires
- November 2029
- Population served
- 367
- CWNS 2022
Windham Wastewater Treatment Plant is a publicly owned wastewater treatment works in Windham, Greene County, New York treating an average of 0.16 million gallons per day against a permitted design capacity of 0.45 MGD, serving about 367 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit NY0262935 (effective), which expires in November 2029, with 18 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 18
- Effluent violations
- 10
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Windham Wastewater Treatment Plant.
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Grand Gorge · 12 mi away
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Shandaken · 16 mi away
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Fleischmanns · 18 mi away
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Woodstock · 20 mi away
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Stamford · 20 mi away
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Windham Wastewater Treatment Plant: 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 April 24, 2025.