DPW Resumes Water Service Line Inventory "Potholing" in Maple Haven Neighborhood
April 2, 2026The U.S. Environmental Protection Agency (EPA) Revised Lead and Copper Rule (LCRR) requires all public water suppliers to inventory the type of material used in every water service line connected to their water system. The City of Portsmouth submitted its initial inventory of service line materials in October 2024 and has since continued to identify materials that were unknown at that time.
DPW to Conduct Routine Spring Hydrant Flushing Starting April 6, 2026
March 30, 2026The City of Portsmouth Department of Public Works Water Division begins its seasonal flushing of fire hydrants and water mains on Monday, April 6, 2026. The flushing will take place at various locations, Monday through Thursday, between 7 pm and 11 pm, and is expected to take six weeks to complete.
DPW Releases 2025 Drinking Water Supply Report for Portsmouth and Pease Tradeport
January 26, 2026The City of Portsmouth's 2025 Water Supply Status Report is now available. This report provides a comprehensive summary of water supply information collected over the course of 2025 and is intended to keep customers informed about current conditions and planning efforts.
FAQs - Service Line Notices
November 17, 2025FAQs For Water Customers Receiving Notice of a Galvanized or Unknown Service Line Material
The latest US Environmental Protection Agency (EPA) Lead & Copper Rule Improvements requires all public water suppliers to inve
City Issues Water Supply Status Report Encouraging Efficient Water Use Due to Severe Drought Conditions
September 25, 2025The City of Portsmouth NH Department of Public Works Water Division has issued a Water Supply Status Report, an update of its August report, to inform Portsmouth Water Division customers of the latest water supply conditions.
City Water Division Issues Water Supply Status Report
September 24, 2025The City of Portsmouth NH Department of Public Works Water Division has issued a Water Supply Status Report, an update of its August report, to inform Portsmouth Wa
DPW Begins Limited Fall Hydrant Flushing
September 16, 2025The City of Portsmouth Department of Public Works Water Division begins its seasonal routine flushing of fire hydrants and water mains on Monday, September 22, 2025. Due to the ongoing drought conditions on the Seacoast, the flushing will be limited to targeted areas. The flushing will take place for the next four weeks, Monday through Thursday, between 7 am and 11 pm.
Water Division Issues "Moderate Drought" Water Report
August 15, 2025The Seacoast area is currently in a Moderate Drought according to the US Drought Monitor program. There has only been 2.6 inches of precipitation in the area since May 2025. This is about 6.4 inches below normal for this period. The recent dry and hot weather has also caused a spike in water demand up to 5.7 million gallons per day (MGD) on average, which exceeds the 10-year average for August of 5.0 MGD.
Portsmouth & Pease Drinking Water Supply Update 2025 Q2
July 28, 2025The City of Portsmouth, NH, water supply sources have recovered from the drought conditions that began in late summer 2024. The Bellamy Reservoir surface water source has rebounded from the significantly low levels recorded in September and October, aided by late winter snowmelt and spring precipitation.
What to do if you have Discolored Water
June 11, 2025Discolored water results when water traveling through the water mains reaches high enough velocities to stir the sediment lying in the bottom of the water mains. Water main breaks, fire fighting activities, and extremely high system demand are typical causes of discolored water.