Harrison Brook STP
Liberty Corner, NJ · Somerset County · Publicly Owned Treatment Works
- Average flow
- 1.29 MGD
- Design flow
- —
- NPDES permit
- NJ0022845
- Effective
- Permit expires
- March 2027
- Population served
- 27,025
- CWNS 2022
Harrison Brook STP is a publicly owned wastewater treatment works in Liberty Corner, Somerset County, New Jersey treating an average of 1.29 million gallons per day, serving about 27,025 residents. Treatment on site includes clarifiers, aerated lagoons, carrousels / oxidation ditches. It discharges under NPDES permit NJ0022845 (effective), which expires in March 2027, with 6 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
- 6
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Harrison Brook STP.
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Nearby wastewater treatment plants in New Jersey
Warren · 1 mi away
0.09 MGD
Warren · 3 mi away
0.39 MGD
Bernardsville · 4 mi away
0.44 MGD
Stirling · 4 mi away
0.9 MGD
Warren · 6 mi away
0.24 MGD
Bridgewater · 7 mi away
12.98 MGD
Berkeley Heights · 7 mi away
1.15 MGD
Chatham · 9 mi away
0.71 MGD
Harrison Brook STP: 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 April 24, 2025.