December 1998
The EPA is alerted to the risks of PFAS. 3M provides the EPA with evidence that PFAS accumulates in blood.
1970s
According to a document on file with the EPA, 3M “knew as early as the 1970s that PFAS was accumulating in human blood.”
1967
The U.S. Navy makes it mandatory for its vessels to carry AFFF on board.
1963
U.S. Navy scientists begin working with 3M to develop AFFF.
1947
PFOA is created in a lab for the first time.