“…Perfluoroalkyl and polyfluoroalkyl substances (PFASs), most notably perfluoroalkyl acids (PFAAs) such as perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), are present at elevated concentrations in surface waters, soils, groundwater and drinking water near to domestic and military airports, oil and gas sites, and firefighter training areas at multiple locations globally (for examples, see Table 1) (Awad et al, 2011;Moody et al, 2002;Kwadijk et al, 2014;De Solla et al, 2012;Filipovic et al, 2015;Kärrman et al, 2011;Moody et al, 2003;Schultz et al, 2004a;McGuire et al, 2014;Backe et al, 2013;Weiß et al, 2012;Rumsby et al, 2009;Järnberg et al, 2001). The contamination of the environmental media and drinking water by PFASs at these multiple global sites mostly originates from the repeated use and uncontrolled release of fire-fighting foams containing PFASs to the environment during fire-fighting and firefighter training activities over many years.…”