Pierce Island Wastewater Treatment Plant
Portsmouth, NH · Rockingham County · Publicly Owned Treatment Works
- Average flow
- 2.7 MGD
- Design flow
- 4.8 MGD
- NPDES permit
- 3603729151
- Effective
- Permit expires
- November 2028
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 39
- Effluent violations
- 14
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Portsmouth
| Project | Budget | Years |
|---|---|---|
| Mechanic Street Pumping Station Upgrade | $25,550,000 | 2025–2031 |
| Annual Water Line Replacement | $10,000,000 | 2026–2031 |
| Annual Sewer Line Replacement | $9,000,000 | 2026–2031 |
| Wastewater Reuse at Pease Wastewater Treatment Facility | $8,400,000 | 2027–2031 |
| Peirce Island Wastewater Treatment Facility | $4,900,000 | 2025–2027 |
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
38 verified contacts for Pierce Island Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 38 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Pierce Island Wastewater Treatment Plant — plus full compliance history and discharge data.
Try Klarifi free+ 34 more verified contacts in Klarifi
Data sourced from public EPA / NPDES records and Klarifi analysis. Last updated April 2025.