Washington Boro WWTP
Washington, NJ · Warren County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 1.5 MGD
- NPDES permit
- NJ0021113
- Effective
- Permit expires
- June 2029
- Population served
- 54,645
- CWNS 2022
Washington Boro WWTP is a publicly owned wastewater treatment works in Washington, Warren County, New Jersey, serving about 54,645 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit NJ0021113 (effective), which expires in June 2029, with 91 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 91
- Effluent violations
- 19
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Washington Boro WWTP.
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Nearby wastewater treatment plants in New Jersey
Washington · 2 mi away
0.002 MGD
Oxford · 5 mi away
0.21 MGD
Glen Gardner · 6 mi away
0.007 MGD
Belvidere · 7 mi away
0.3 MGD
Hampton · 9 mi away
0.0009 MGD
Annandale · 10 mi away
0.03 MGD
Lebanon · 11 mi away
0.0018 MGD
Long Valley · 12 mi away
0.14 MGD
Washington Boro 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 November 28, 2025.