Colebrook Wastewater Treatment Plant
99 Lynch Dr, Colebrook, NH 03576 · Coos County · Publicly Owned Treatment Works
- Average flow
- 0.28 MGD
- Design flow
- —
- NPDES permit
- NHG580315
- Effective
- Permit expires
- November 2026
- Population served
- 1,062
- CWNS 2022
Colebrook Wastewater Treatment Plant is a publicly owned wastewater treatment works in Colebrook, Coos County, New Hampshire treating an average of 0.28 million gallons per day, serving about 1,062 residents. It discharges under NPDES permit NHG580315 (effective), which expires in November 2026, with 33 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Colebrook Wastewater Treatment Plant.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 33
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
8 verified contacts for Colebrook Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 8 verified contacts (5 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Colebrook Wastewater Treatment Plant, plus the full compliance history and discharge data.
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Colebrook Wastewater 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 3, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms