The Environmental Working Group said PFAS, an abbreviation for perfluoroalkyl and polyfluoroalkyl substances, have oozed into the Great Lakes and pose a risk to people who eat fish tainted with the chemicals.
Pentagon documents show at least 385 military installations nationwide are polluted with PFAS, mostly from firefighting foam used widely in training exercises, the group said.
A review of department records showed PFAS has been detected at levels up to 213,000 parts per trillion at the former Wurtsmith Air Force Base in Oscoda, Michigan, which closed in 1993, the Environmental Working Group said.
State officials discovered the contamination in 2010.
Combined levels of PFOA and PFOS, two of the most commonly used chemicals in the group, reached as high as 1.3 million ppt at Niagara Falls Air Reserve Station in Niagara County, New York.
Other readings included 135,000 ppt of the compound PFHxS at General Mitchell International Airport in Milwaukee; 82,000 ppt of PFOA and PFOS at Alpena County Regional Airport in Michigan; 17,000 ppt of PFOS at Selfridge Air National Guard Base in Mount Clemens, Michigan; and 5,400 ppt of PFHxS at Duluth International Airport in Minnesota.
The compounds are called “forever chemicals" because they don't break down in the environment or the human body and can accumulate over time. They have been linked to a variety of health problems including cancer, liver damage and decreased fertility.