Patterson Hamlet WWTP
Patterson, NY · Putnam County · Publicly Owned Treatment Works
- Average flow
- 0.04 MGD
- Design flow
- 0.08 MGD
- NPDES permit
- NY0265080
- Effective
- Permit expires
- December 2030
- Population served
- 800
- CWNS 2022
Patterson Hamlet WWTP is a publicly owned wastewater treatment works in Patterson, Putnam County, New York treating an average of 0.04 million gallons per day against a permitted design capacity of 0.08 MGD, serving about 800 residents. It discharges under NPDES permit NY0265080 (effective), which expires in December 2030, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
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.
Key contacts
Decision-makers at Patterson Hamlet WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in New York
Pawling · 5 mi away
0.2 MGD
Brewster · 7 mi away
0.03 MGD
Carmel · 7 mi away
0.58 MGD
Brewster · 7 mi away
0.11 MGD
Brewster · 8 mi away
0.12 MGD
Poughquag · 8 mi away
0.01 MGD
Carmel · 11 mi away
0.1 MGD
Hopewell Junction · 11 mi away
0.1 MGD
Patterson Hamlet WWTP: 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 September 29, 2025.