198 Tide Mill Road, Hampton, NH 03842 · Rockingham County · Publicly Owned Treatment Works
Leavitt E. Magrath Wastewater Treatment Facility is a publicly owned wastewater treatment works in Hampton, Rockingham County, New Hampshire treating an average of 2.24 million gallons per day against a permitted design capacity of 4.7 MGD, serving about 17,009 residents. It discharges under NPDES permit NH0100625 (expired), which expires in February 2026, with 29 recorded violations in the last three years. EPA has recorded 5 formal enforcement actions naming the plant, the latest in March 2022.
One treatment structure or unit process identified at Leavitt E. Magrath Wastewater Treatment Facility.
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See the full treatment train at Leavitt E. Magrath Wastewater Treatment Facility: structures, unit processes and planned upgrades, with exact unit counts.
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Federal civil enforcement cases, compliance inspections and informal actions recorded for Leavitt E. Magrath Wastewater Treatment Facility in EPA's ICIS system.
Latest case · Mar 2022
HAMPTON WWTF
Administrative order · CWA, NPDES Permit Violations · Final Order Issued · Compliance actions $30,000
EPA's description of the case:
“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…”
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Source: EPA ECHO, civil enforcement case 01-2022-2010.
Full case history with a free Klarifi account
Every action against Leavitt E. Magrath Wastewater Treatment Facility with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Hampton's capital improvement plan lists 2 water, sewer and wastewater line items worth $29M starting 2025–2025. The largest budgeted items are shown here.
| Project | Budget | Years |
|---|---|---|
| Wastewater Treatment Plant Projects | $19,145,000 | 2025–2030 |
| Sewer Main Projects | $10,221,200 | 2025–2030 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Decision-makers at Leavitt E. Magrath Wastewater Treatment Facility.
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Exeter · 8 mi away
1.45 MGD
Rye · 8 mi away
0.0005 MGD
Portsmouth · 11 mi away
3.28 MGD
Portsmouth · 11 mi away
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Newmarket · 12 mi away
0.44 MGD
Portsmouth (newington) · 12 mi away
0.11 MGD
Epping · 15 mi away
0.18 MGD
Durham · 15 mi away
0.72 MGD
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 May 21, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms