Greenport (t) Sd 1 STP
Hudson, NY · Columbia County · Publicly Owned Treatment Works
- Average flow
- 0.48 MGD
- Design flow
- 1.35 MGD
- NPDES permit
- NY0030988
- Effective
- Permit expires
- April 2030
- Population served
- 3,366
- CWNS 2022
Greenport (t) Sd 1 STP is a publicly owned wastewater treatment works in Hudson, Columbia County, New York treating an average of 0.48 million gallons per day against a permitted design capacity of 1.35 MGD, serving about 3,366 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit NY0030988 (effective), which expires in April 2030, with 25 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
Unlock
Unlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 25
- Effluent violations
- 19
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Greenport (t) Sd 1 STP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Greenport (t) Sd 1 STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New York
Hudson · 2 mi away
0.03 MGD
Athens · 2 mi away
0.001 MGD
Athens · 2 mi away
0.18 MGD
Philmont · 5 mi away
0.1 MGD
Catskill · 6 mi away
0.64 MGD
Coxsackie · 7 mi away
0.92 MGD
Chatham · 11 mi away
0.14 MGD
Germantown · 11 mi away
0.03 MGD
Greenport (t) Sd 1 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 May 21, 2025.