Portsmouth and Pease International Tradeport Water Supply Status Report 2019 Year in Review

January 23, 2020

Highlights of 2019

The following report provides a summary of the water system operations for the Portsmouth and Pease International Tradeport drinking water systems. Highlights from 2019 for both water systems include:

•    The Portsmouth and Pease drinking water systems had no drinking water quality violations in 2019.
•    Water production was the lowest it has been in 33 years due to success in tracking, locating and fixing leaks throughout both water systems
•    Groundwater capacity in active wells is better than normal due to optimization of system
•    Average daily residential water use is down 22% since 2010
•    Construction of a new water filtration system to treat PFAS contamination in the Pease wells continues

Water supplied to Portsmouth water system customers comes from a combination of surface water and groundwater sources. The surface water supply is the Bellamy Reservoir, which is located in Madbury and Dover. Water flows from the reservoir to the Water Treatment Facility (WTF) in Madbury, where it is treated using a coagulation, dissolved air flotation and dual-media filtration process. The treated water is chlorinated with sodium hypochlorite before distribution into the system. Sodium hydroxide (used to adjust the final pH and alkalinity), fluoride as hydrofluorosilicic acid (used to prevent tooth decay) and poly/ortho-phosphate (a sequestering chemical to reduce precipitation of iron and manganese, and inhibit corrosion -- all to protect distribution system pipes) are also added before distribution to our regionally-served water customers.

Water supplied to Pease Tradeport water system customers comes primarily from the groundwater wells located on the Tradeport (Harrison Well and Smith Well). Portsmouth water system (EPA PWSID# 1951010) supplies water to the Pease Tradeport water system, as needed.

Water Supply Status Report 2019 Year in Review