Chatham (v) STP
Chatham, NY · Columbia County · Publicly Owned Treatment Works
- Average flow
- 0.14 MGD
- Design flow
- 0.55 MGD
- NPDES permit
- NY0023582
- Effective
- Permit expires
- October 2030
- Population served
- 2,078
- CWNS 2022
Chatham (v) STP is a publicly owned wastewater treatment works in Chatham, Columbia County, New York treating an average of 0.14 million gallons per day against a permitted design capacity of 0.55 MGD, serving about 2,078 residents. Treatment on site includes carrousels / oxidation ditches. It discharges under NPDES permit NY0023582 (effective), which expires in October 2030, with 86 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Carrousels / oxidation ditches
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Compliance snapshot (last 3 years)
- Total violations
- 86
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Chatham (v) STP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Chatham (v) STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New York
Philmont · 9 mi away
0.1 MGD
Hudson · 9 mi away
0.03 MGD
Coxsackie · 10 mi away
0.92 MGD
Hudson · 11 mi away
0.48 MGD
New Baltimore · 11 mi away
0.009 MGD
Coeymans · 12 mi away
0.4 MGD
Athens · 12 mi away
0.001 MGD
Athens · 13 mi away
0.18 MGD
Chatham (v) STP: 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 August 13, 2026.