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Leavitt E. Magrath Wastewater Treatment Facility

198 Tide Mill Road, Hampton, NH 03842 · Rockingham County · Publicly Owned Treatment Works

Average flow
2.24 MGD
Design flow
4.7 MGD
NPDES permit
NH0100625
Expired
Permit expires
February 2026
Population served
17,009
CWNS 2022

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.

Treatment technology

One treatment structure or unit process identified at Leavitt E. Magrath Wastewater Treatment Facility.

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Compliance snapshot (last 3 years)

Total violations
29
Effluent violations
29

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 Leavitt E. Magrath Wastewater Treatment Facility in EPA's ICIS system.

Formal actions
5
1 since FY2020
Penalties assessed
$5,700
all cases
Compliance actions
$32,500
required by EPA orders
EPA inspections
0
none on record

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.

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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.

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Capital improvement projects in Hampton

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.

ProjectBudgetYears
Wastewater Treatment Plant Projects$19,145,0002025–2030
Sewer Main Projects$10,221,2002025–2030

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.

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Key contacts

Decision-makers at Leavitt E. Magrath Wastewater Treatment Facility.

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Nearby wastewater treatment plants in New Hampshire

1.45 MGD

Wallis Sands State Park

Rye · 8 mi away

0.0005 MGD

3.28 MGD

Pease Wastewater Treatment Facility

Portsmouth · 11 mi away

—

Newmarket, Town Of - WPCF

Newmarket · 12 mi away

0.44 MGD

Newington Wastewater Treatment Plant

Portsmouth (newington) · 12 mi away

0.11 MGD

0.18 MGD

0.72 MGD

Leavitt E. Magrath Wastewater Treatment Facility: 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 May 21, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms


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