Abbreviation
WW
680 Peverly Hill Rd, Portsmouth, NH 03801
(603) 427-1530
Mon – Fri 7:30 AM – 3:30 PM
Seal Image
Facility
Theme Colors
department-theme-orange-brown
Name Override
Wastewater & Sewer
Homepage
Show Seal in Header
No
Peirce Island Wastewater Facility Upgrade Project
Update: On August 4, 2025 the City Council authorized bonding for equipment deferred during the original construction, due to cost.
Peirce Island Wastewater Facility Project
test test test
Sewer Collection System
The City of Portsmouth is a regional provider of wastewater collection and treatment services to the City of Portsmouth, Town of New Castle and portions of the Towns of Greenland and Rye. The City has two wastewater collection systems that convey wastewater to separate wastewater treatment facilities (WWTF) at the Peirce Island WWTF and the Pease International Tradeport WWTF. The collection systems for the Pierce Island WWTF and Pease International Tradeport WWTF are shown in the figure below and services downtown Portsmouth and the client communities.
Wastewater Pumping Stations
Wastewater pumping stations are necessary in a sewer collection system to lift wastewater from low elevations in the system to a higher elevation in the system as it is conveyed toward a treatment facility. The City has 20 wastewater pumping stations: 19 located within the Peirce Island WWTF Collection System and one located within the Pease WWTF Collection System.