CONCORD, N.H. (AP) — The U.S. House of Representatives has adopted an amendment written by New Hampshire Rep. Carol Shea-Porter appropriating $7 million to launch a health study of emerging drinking water contaminants like those found at the Pease International Tradeport.

Its passage Thursday follows a July 18 letter she and a group of bipartisan colleagues sent to House appropriators detailing the scope of perfluorinated chemical contamination and urging them to support funds for a study. Fellow Democratic Rep. Annie Kuster is an amendment co-sponsor.

A provision in the federal defense spending bill added by Democratic New Hampshire Sen. Jeanne Shaheen also would fund a study.

At Pease, a well found to have high levels of one PFC has been shut down. The Air Force is designing a groundwater treatment system for the former military base, but recently said it wouldn't pay for a study.