The City of Portsmouth, New Hampshire provides drinking water, wastewater, and stormwater services to residents and local businesses. The utility provides drinking water to about 8,000 customers in the communities of Portsmouth, Greenland, Rye, Newcastle and Newington, and large commercial, industrial and recreational customers. A surface water reservoir and wells are the primary drinking water sources and the City operates an advanced water treatment plant. The City operates two wastewater treatment facilities, twenty wastewater pump stations and recently completed the construction phase of its long-term control plan for combined sewer overflows.
As an Eco-Municipality, Portsmouth makes continuous "green" improvements to support its sustainability goals.