US Water Likely Contains More 'Forever Chemicals' Than EPA Tests Show

An anonymous reader quotes a report from the Guardian: In May 2021, a celebration for Portsmouth, New Hampshire's new $17m water treatment facility drew local and national officials who declared the city's water free of toxic "forever chemicals." Firefighting foam from the nearby Pease air force base had polluted the water for decades with per- and polyfluoroalkyl substances (PFAS), and in recognition of the public health threat the US military funded the city's new filtration system. Officials said after implementing the upgraded filtration, testing no longer found detectable levels of PFAS chemicals in the water. They called the work in Portsmouth a "national model" for addressing PFAS water contamination. "We are here to celebrate clean water," Senator Maggie Hassan said at the time. But the water may not be clean after all. A Guardian analysis of water samples taken in Portsmouth and from eight other locations around the United States shows that the type of water testing relied on by the US Environmental Protection Agency (EPA) -- and officials in towns such as Portsmouth -- is so limited in scope that it is probably missing significant levels of PFAS pollutants. The undercount leaves regulators with an incomplete picture of the extent of PFAS contamination and reveals how millions of people may be facing an unknown health risk in their drinking water. The analysis checked water samples from PFAS hot spots around the country with two types of tests: an EPA-developed method that detects 30 types of the approximately 9,000 PFAS compounds, and another that checks for a marker of all PFAS. The Guardian found that seven of the nine samples collected showed higher levels of PFAS in water using the test that identifies markers for PFAS, than levels found when the water was tested using the EPA method -- and at concentrations as much as 24 times greater. "The EPA is doing the bare minimum it can and that's putting people's health at risk," said Kyla Bennett, policy director at the advocacy group Public Employees for Environmental Responsibility. "PFAS are a class of chemicals used since the 1950s to make thousands of products repel water, stains and heat," notes the Guardian. "They are often called 'forever chemicals' because they don't fully break down, accumulating in the environment, humans and animals. Some are toxic at very low levels and have been linked to cancer, birth defects, kidney disease, liver problems, decreased immunity and other serious health issues." "[W]hen it comes to identifying PFAS-contaminated water, the limitations of the test used by state and federal regulators, which is called the EPA 537 method, virtually guarantees regulators will never have a full picture of contamination levels as industry churns out new compounds much faster than researchers can develop the science to measure them," adds the report. "That creates even more incentive for industry to shift away from older compounds: if chemical companies produce newer PFAS, regulators won't be able to find the pollution."

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