Hooksett Wastewater Treatment Facility
Hooksett, NH · Merrimack County · Publicly Owned Treatment Works
- Average flow
- 0.68 MGD
- Design flow
- 2.2 MGD
- NPDES permit
- NH0100129
- Administratively continued
- Permit expires
- September 2018
- Population served
- 6,000
- CWNS 2022
Hooksett Wastewater Treatment Facility is a publicly owned wastewater treatment works in Hooksett, Merrimack County, New Hampshire treating an average of 0.68 million gallons per day against a permitted design capacity of 2.2 MGD, serving about 6,000 residents. Treatment on site includes clarifiers, uncovered lagoons. It discharges under NPDES permit NH0100129 (administratively continued), which expires in September 2018, with 1 recorded violation in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Hooksett
Hooksett's capital improvement plan lists 7 water, sewer and wastewater line items worth $6M starting 2027–2031. The largest budgeted items are shown here.
All water and sewer capital projects in Hooksett →
| Project | Budget | Years |
|---|---|---|
| Martins Ferry Force Main Upgrades | $2,100,000 | 2028–2029 |
| Aeration Blower Upgrade | $1,300,000 | 2030–2031 |
| K-Mart Pump Station Upgrades | $1,300,000 | 2031–2032 |
| Aeration Media Replacement | $750,000 | 2031–2032 |
| Wastewater Plant Roof Replacement | $200,000 | 2027–2028 |
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.
Key contacts
Decision-makers at Hooksett Wastewater Treatment Facility.
No verified contacts on file yet
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Nearby wastewater treatment plants in New Hampshire
Allenstown · 4 mi away
0.45 MGD
Concord · 8 mi away
3.2 MGD
Derry · 16 mi away
1.17 MGD
Hopkington · 16 mi away
0.03 MGD
Concord · 16 mi away
0.18 MGD
Merrimack · 18 mi away
1.37 MGD
Milford · 19 mi away
0.78 MGD
Henniker · 19 mi away
0.11 MGD
Hooksett 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 September 11, 2026; facility record last updated November 14, 2025.