Waterville Valley Wastewater Treatment Plant
Tripoli Road, Waterville Valley, NH 03215 · Grafton County · Publicly Owned Treatment Works
- Average flow
- 0.2 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 0.2 million gallons per day against a permitted design capacity of 0.55 MGD, serving about 1,140 residents. It discharges under NPDES permit NH0100781 (effective), which expires in March 2027, with 6 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in April 2026.
Treatment technology
One treatment structure or unit process identified at Waterville Valley Wastewater Treatment Plant.
Available with a free Klarifi account
See the full treatment train at Waterville Valley Wastewater Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Waterville Valley Wastewater Treatment Plant in EPA's ICIS system.
- Formal actions
- 3
- 2 since FY2020
- Compliance actions
- $90M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Apr 2026
WATERVILLE VALLEY ADVANCED WWTF
Administrative order · CWA, NPDES Permit Violations · Final Order Issued · Compliance actions $90M
EPA's description of the case:
“On April 28, 2026, the Region entered into an administrative order on consent ( AOC ) with the Town of Waterville Valley, New Hampshire memorializing the schedule agreed to between EPA and the Town…”
Unlock EPA's full description by creating a free account on Klarifi. Create a free account →
Source: EPA ECHO, civil enforcement case 01-2026-2022.
Full case history with a free Klarifi account
Every action against Waterville Valley Wastewater Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Waterville Valley 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 Waterville Valley Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New Hampshire
Woodstock · 10 mi away
0.11 MGD
Ashland · 19 mi away
0.35 MGD
Bristol · 26 mi away
0.2 MGD
Lisbon · 27 mi away
0.18 MGD
Littleton · 29 mi away
0.55 MGD
Haverhill · 30 mi away
0.18 MGD
Whitefield · 30 mi away
0.13 MGD
Lancaster · 37 mi away
0.0034 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 October 26, 2026; facility record last updated November 6, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms