Groveton Wastewater Treatment Plant
24 Eames St, Northumberland, NH 03582 · Coos County · Publicly Owned Treatment Works
- Average flow
- 0.09 MGD
- Design flow
- 0.37 MGD
- NPDES permit
- NHG580226
- Effective
- Permit expires
- November 2026
- Population served
- 1,278
- CWNS 2022
Groveton Wastewater Treatment Plant is a publicly owned wastewater treatment works in Northumberland, Coos County, New Hampshire treating an average of 0.09 million gallons per day against a permitted design capacity of 0.37 MGD, serving about 1,278 residents. It discharges under NPDES permit NHG580226 (effective), which expires in November 2026, with 15 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Groveton Wastewater Treatment Plant.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 15
- Effluent violations
- 15
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Groveton Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Groveton Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New Hampshire
Groveton · 1 mi away
0.04 MGD
Lancaster · 8 mi away
0.0034 MGD
Lancaster · 9 mi away
0.68 MGD
North Stratford · 12 mi away
0.02 MGD
Whitefield · 16 mi away
0.13 MGD
Berlin · 19 mi away
1.75 MGD
Colebrook · 21 mi away
0.28 MGD
Littleton · 24 mi away
0.55 MGD
Groveton 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 · Filter press · FOG · all terms