Ocsd#1 - Harriman Sewage Treatment Plant
72 River Rd, Harriman, NY 10926 · Orange County · Publicly Owned Treatment Works
- Average flow
- 5.6 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 5.6 million gallons per day, serving about 47,040 residents. It discharges under NPDES permit NYR00A935 (effective), which expires in March 2028, with 48 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in March 2024.
Treatment technology
3 treatment structures and unit processes identified at Ocsd#1 - Harriman Sewage Treatment Plant.
Available with a free Klarifi account
See the full treatment train at Ocsd#1 - Harriman Sewage Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 48
- Effluent violations
- 48
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 Ocsd#1 - Harriman Sewage Treatment Plant in EPA's ICIS system.
- Formal actions
- 3
- 1 since FY2020
- Compliance actions
- $17,965
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Mar 2024
Orange County Sewer District No.1
Administrative order · CWA, Effluent Limitations - NPDES Toxic & Pretreatment Effluent Standards · Final Order No Penalty · Compliance actions $1,465
EPA's description of the case:
“Respondent failed to implement its industrial pretreatment program as approved and in accordance with the General Pretreatment Regulations at 40 CFR 403.”
Source: EPA ECHO, civil enforcement case 02-2023-3013.
Full case history with a free Klarifi account
Every action against Ocsd#1 - Harriman Sewage Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
3 verified contacts for Ocsd#1 - Harriman Sewage Treatment Plant, with validated emails and direct phone numbers.
Unlock 3 verified contacts
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
0.96 MGD
Highland Mills · 4 mi away
0.04 MGD
Washingtonville · 5 mi away
0.0041 MGD
Tuxedo Park · 7 mi away
0.21 MGD
Washingtonville · 8 mi away
0.5 MGD
Fort Montgomery · 8 mi away
0.09 MGD
Warwick · 9 mi away
0.19 MGD
Highland Falls · 10 mi away
0.92 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 October 26, 2026; facility record last updated September 14, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms