Ocsd#1 - Harriman Sewage Treatment Plant
Harriman, NY · Orange County · Publicly Owned Treatment Works
- Average flow
- 4.53 MGD
- Design flow
- —
- NPDES permit
- NYR00A935
- Effective
- Permit expires
- March 2028
- Population served
- 47,040
- CWNS 2022
Ocsd#1 - Harriman Sewage Treatment Plant is a publicly owned wastewater treatment works in Harriman, Orange County, New York treating an average of 4.53 million gallons per day, serving about 47,040 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches, biogas silos. It discharges under NPDES permit NYR00A935 (effective), which expires in March 2028, with 50 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Uncovered lagoons
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Carrousels / oxidation ditches
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Biogas silos
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Compliance snapshot (last 3 years)
- Total violations
- 50
- Effluent violations
- 50
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Ocsd#1 - Harriman Sewage Treatment Plant, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Ocsd#1 - Harriman Sewage Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New York
Monroe · 2 mi away
0.8 MGD
Highland Mills · 4 mi away
0.02 MGD
Washingtonville · 5 mi away
0.0054 MGD
Tuxedo Park · 7 mi away
0.09 MGD
Washingtonville · 8 mi away
0.39 MGD
Fort Montgomery · 8 mi away
0.07 MGD
Warwick · 9 mi away
0.14 MGD
Cornwall · 11 mi away
0.04 MGD
Ocsd#1 - Harriman Sewage 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 March 9, 2025.