W Swanzey WWTF
Swanzey, NH · Cheshire County · Publicly Owned Treatment Works
- Average flow
- 0.05 MGD
- Design flow
- —
- NPDES permit
- NHG580015
- Effective
- Permit expires
- November 2026
- Population served
- —
- CWNS 2022
W Swanzey WWTF is a publicly owned wastewater treatment works in Swanzey, Cheshire County, New Hampshire treating an average of 0.05 million gallons per day. Treatment on site includes aerated lagoons. It discharges under NPDES permit NHG580015 (effective), which expires in November 2026, with 208 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 208
- Effluent violations
- 75
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
12 verified contacts for W Swanzey WWTF, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at W Swanzey WWTF, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New Hampshire
Keene · 3 mi away
1.26 MGD
Winchester · 7 mi away
0.11 MGD
Westmoreland · 10 mi away
0.01 MGD
Hinsdale · 10 mi away
0.07 MGD
Charlestown · 25 mi away
0.03 MGD
Henniker · 34 mi away
0.11 MGD
Milford · 36 mi away
0.78 MGD
Claremont · 36 mi away
1.2 MGD
W Swanzey WWTF: 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 14, 2025.