EPA enforcement actions against wastewater plants in New Hampshire
52 formal actions at 19 of 47 plants · $412,750 in penalties · 7 EPA inspections
EPA's enforcement records list 52 formal civil enforcement cases naming publicly owned wastewater treatment plants in New Hampshire, 7 of them since fiscal year 2020. The cases involve 19 of the state's 47 plants, with $412,750 in penalties assessed. The most common ground is npdes permit violations (25 cases). EPA has inspected 7 plants in the state, 7 inspections in total. Every plant links to its profile, and every case to its report on EPA's ECHO site.
Recent enforcement actions in New Hampshire
| Plant | Date | Type | Law section | Outcome | Penalty | Source |
|---|---|---|---|---|---|---|
| Waterville Valley Wastewater Treatment Plant Waterville Valley | Apr 2026 · FY2026 | Administrative order | NPDES Permit Violations | Final Order Issued | — | ECHO 01-2026-2022 |
| EPA's description: “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…” | ||||||
| Waterville Valley Wastewater Treatment Plant Waterville Valley | Aug 2024 · FY2024 | Administrative order | NPDES Permit Violations | Final Order No Penalty | — | ECHO 01-2024-2068 |
| Rochester Wastewater Treatment Facility Rochester | Mar 2024 · FY2024 | Administrative order | NPDES Permit Violations | Final Order Issued | — | ECHO 01-2024-2034 |
| EPA's description: “On March 27, 2024, EPA entered into an administrative order on consent (AOC) with the City of Rochester, New Hampshire which provides a schedule for the City to meet its total phosphorus limit in its…” | ||||||
| Epping Wasterwater Treatment Facility Epping | May 2023 · FY2023 | Administrative order | NPDES Permit Violations | Final Order Issued | — | ECHO 01-2023-2022 |
| EPA's description: “On May 11, 2023, the Region issued an administrative order (AO) to the Town of Epping, New Hampshire to cease bypasses at its wastewater treatment plant. The plant discharges upstream of several…” | ||||||
| Epping Wasterwater Treatment Facility Epping | Apr 2023 · FY2016 | Administrative order | NPDES Permit Violations | Final Order No Penalty | — | ECHO 01-2016-2023 |
| Milford Wastewater Treatment Facility Milford | Mar 2023 · FY2023 | Administrative order | NPDES Permit Violations | Final Order Issued | — | ECHO 01-2023-2010 |
| EPA's description: “On March 23, 2023, EPA issued a Clean Water Act (CWA) Administrative Order (Order) to the Town of Milford, New Hampshire that provides the Town an extension to two interim milestones in its National…” | ||||||
| Manchester Wastewater Treatment Facility Manchester | Jan 2023 · FY2017 | Judicial case | Solid Waste Fuel Combustion | Final Order With Penalty | $131,800 | ECHO 01-2017-1004 |
| EPA's description: “EPA's recent sewage sludge incinerator (SSI) regulations for existing sources at 40 CFR Part 62, Subpart LLL (Federal Plan Requirements for SSI Units Constructed On or Before October 14, 2010) seek…” | ||||||
| Exeter Wastewater Treatment Facility Exeter | Dec 2022 · FY2013 | Administrative order | NPDES Discharge without a Permit | Final Order No Penalty | — | ECHO 01-2013-2027 |
| Berlin Pollution Control Facility Berlin | Oct 2022 · FY2011 | Administrative order | NPDES Permit Violations | Final Order No Penalty | — | ECHO 01-2011-2501 |
| EPA's description: “Region I issued a Clean Water Act (Act) Administrative Order to the City of Berlin, New Hampshire for violations of its National Pollutant Discharge Elimination System (NPDES) permit and Section…” | ||||||
| Leavitt E. Magrath Wastewater Treatment Facility Hampton | Mar 2022 · FY2022 | Administrative order | NPDES Permit Violations | Final Order Issued | — | ECHO 01-2022-2010 |
| EPA's description: “On March 14, 2021 the Region entered into an administrative order on consent (AOC) with the Town of Hampton, New Hampshire to provide a schedule for it to meet its Total Copper limit in its NPDES…” | ||||||
Full case histories, milestones, violation types and EPA's complete case summaries for every plant are shown with a free Klarifi account. Create one →
Largest penalties in New Hampshire
| # | Plant | Date | Type | Outcome | Penalty | Compliance actions | Source |
|---|---|---|---|---|---|---|---|
| 1 | Manchester Wastewater Treatment Facility Manchester | Jan 2023 · FY2017 | Judicial case | Final Order With Penalty | $131,800 | $6.1M | ECHO 01-2017-1004 |
| 2 | Pierce Island Wastewater Treatment Plant Portsmouth | Oct 2003 · FY1989 | Judicial case | Final Order With Pen & Unspecified Cost Recovery | $100,000 | — | ECHO 01-1989-0003 |
| 3 | Manchester Wastewater Treatment Facility Manchester | Mar 1979 · FY1978 | Judicial case | Final Order With Penalty | $75,000 | — | ECHO 01-1978-0002 |
| 4 | Keene Wastewater Treatment Facility Keene | Apr 2006 · FY2005 | Administrative order | Final Order With Penalty | $58,000 | — | ECHO 01-2005-2001 |
| 5 | Huckleberry Hill Wastewater Treatment Facility Dover | Dec 2013 · FY2005 | Administrative order | Final Order With Penalty | $36,000 | — | ECHO 01-2005-2002 |
| 6 | Leavitt E. Magrath Wastewater Treatment Facility Hampton | May 1998 · FY1998 | Administrative order | Final Order With Penalty | $5,700 | — | ECHO 01-1998-0055 |
| 7 | Lisbon Wastewater Treatment Facility Lisbon | Jun 1998 · FY1997 | Administrative order | Final Order With Penalty | $5,000 | — | ECHO 01-1997-0022 |
| 8 | Town Of Bristol WWTF Bristol | Oct 1997 · FY1997 | Administrative order | Final Order With Penalty | $1,000 | — | ECHO 01-1997-0117 |
| 9 | Suncook Wastewater Treatment Facility Allenstown | Jun 1995 · FY1995 | Administrative order | Final Order With Penalty | $250 | — | ECHO 01-1995-0075 |
Actions by fiscal year
| Fiscal year | Formal actions | Penalties |
|---|---|---|
| FY2017 | 1 | $131,800 |
| FY2018 | 0 | — |
| FY2019 | 1 | — |
| FY2020 | 0 | — |
| FY2021 | 1 | — |
| FY2022 | 1 | — |
| FY2023 | 2 | — |
| FY2024 | 2 | — |
| FY2025 | 0 | — |
| FY2026 | 1 | — |
EPA fiscal years run from 1 October to 30 September. The current year is partial.
EPA enforcement in New Hampshire: 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 17, 2026.
Enforcement data: EPA ICIS-FE&C civil enforcement cases and ICIS compliance inspections, via ECHO. Penalties are the amounts assessed or agreed in each case as EPA records them. Latest case status in this data: Apr 2026.