Newington Wastewater Treatment Plant
Portsmouth (newington), NH · Rockingham County · Publicly Owned Treatment Works
- Average flow
- 0.1 MGD
- Design flow
- —
- NPDES permit
- NHG581141
- Effective
- Permit expires
- November 2026
- Population served
- 105
- CWNS 2022
Newington Wastewater Treatment Plant is a publicly owned wastewater treatment works in Portsmouth (newington), Rockingham County, New Hampshire treating an average of 0.1 million gallons per day, serving about 105 residents. It discharges under NPDES permit NHG581141 (effective), which expires in November 2026, with 82 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 82
- Effluent violations
- 73
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Newington Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Newington Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New Hampshire
Portsmouth · 1 mi away
—
Portsmouth · 3 mi away
2.38 MGD
Dover · 5 mi away
1.91 MGD
Rye · 6 mi away
0.0021 MGD
Durham · 6 mi away
0.83 MGD
Newmarket · 7 mi away
0.35 MGD
Exeter · 10 mi away
1.1 MGD
Hampton · 12 mi away
2.08 MGD
Newington 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 September 11, 2026; facility record last updated August 10, 2026.