Water Division Issues Portsmouth and Pease International Tradeport Drinking Water Status Report 2025 Year in Review
January 26, 2026
The Water Division has reported a summary of the 2025 water system operations for the Portsmouth and Pease International Tradeport drinking water systems.
Highlights from 2025 for both water systems include:
• The Portsmouth and Pease Drinking Water Systems had no drinking water quality violations in 2025.
• Water Production (Portsmouth and Pease combined):
o 4.1 million gallons – Average Day
o 6.6 million gallons – Maximum Day
o 2.6 million gallons – Minimum Day
Portsmouth’s drinking water supply has remained resilient despite drought conditions that have persisted since late summer. Water levels in the Bellamy Reservoir, the City’s primary surface water source, have rebounded from the lows observed in October following recent storm events. However, groundwater levels remain below average at two of the City’s seven groundwater sources as the year comes to a close.
During the winter months, frozen ground limits the natural recharge of groundwater, which means drought conditions can persist until spring. For now, Water Division staff will continue to closely monitor conditions and adjust operations as needed, relying more heavily on surface water withdrawals when appropriate.
The graphic below illustrates monthly precipitation totals recorded at the Pease NOAA weather station, as well as cumulative precipitation for the year. New Hampshire experienced one of its driest years on record. While precipitation in April and May exceeded the 25-year average, all other months before and after received below-average rainfall. From the start of summer through the end of the year, conditions were especially dry, with June precipitation 67% below average and July 82% below average. If dry conditions continue through the winter and spring, water use restrictions may be necessary in 2026. The Portsmouth Water Division encourages all customers to remain mindful of their water use and to practice water efficiency whenever possible.
