Waterville Valley Wastewater Treatment Plant
Waterville Valley, NH · Grafton County · Publicly Owned Treatment Works
- Average flow
- 0.14 MGD
- Design flow
- 0.55 MGD
- NPDES permit
- NH0100781
- Effective
- Permit expires
- March 2027
- Population served
- 1,140
- CWNS 2022
Waterville Valley Wastewater Treatment Plant is a publicly owned wastewater treatment works in Waterville Valley, Grafton County, New Hampshire treating an average of 0.14 million gallons per day against a permitted design capacity of 0.55 MGD, serving about 1,140 residents. Treatment on site includes aerated lagoons. It discharges under NPDES permit NH0100781 (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.
Aerated lagoons
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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
1 verified contact for Waterville Valley Wastewater Treatment Plant, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Waterville Valley Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New Hampshire
Woodstock · 10 mi away
0.08 MGD
Ashland · 19 mi away
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Bristol · 26 mi away
0.21 MGD
Lisbon · 27 mi away
0.02 MGD
Littleton · 29 mi away
0.27 MGD
Haverhill · 30 mi away
0.18 MGD
Whitefield · 30 mi away
0.09 MGD
Lancaster · 37 mi away
0.0011 MGD
Waterville Valley 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 November 6, 2025.