Greenport Power Plant
236 Third Street, Greenport, NY 11944 · Suffolk County · Publicly Owned Treatment Works
- Average flow
- 0.32 MGD
- Design flow
- 0.65 MGD
- NPDES permit
- NY0020079
- Administratively continued
- Permit expires
- July 2018
- Population served
- 2,172
- CWNS 2022
Greenport Power Plant is a publicly owned wastewater treatment plant in Greenport, Suffolk County, New York treating an average of 0.32 million gallons per day against a permitted design capacity of 0.65 MGD, serving about 2,172 residents. It discharges under NPDES permit NY0020079 (administratively continued), which expires in July 2018, with 0 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in April 2000.
Treatment technology
Treatment structures and unit processes at Greenport Power Plant.
Treatment structure data not yet analyzed for this facility.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Greenport Power Plant in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Penalties assessed
- $1,000
- all cases
- Compliance actions
- $800
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Apr 2000
GREENPORT VILLAGE
Administrative order · SDWA, National Drinking Water Regulations · Unilateral Administrative Order Without Adjudication · Compliance actions $800
Source: EPA ECHO, civil enforcement case 02-2000-8426.
Full case history with a free Klarifi account
Every action against Greenport Power Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Greenport Power Plant.
No verified contacts on file yet
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Nearby wastewater treatment plants in New York
Sag Harbor · 8 mi away
0.07 MGD
Riverhead · 19 mi away
0.99 MGD
Shirley · 33 mi away
—
Farmingville · 40 mi away
0.02 MGD
Stony Brook · 41 mi away
1.7 MGD
Patchogue · 42 mi away
0.4 MGD
Kings Park · 47 mi away
0.27 MGD
Ocean Beach · 52 mi away
0.11 MGD
Greenport Power 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 October 26, 2026; facility record last updated June 10, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms