Green Science Policy Institute
Per- and polyfluoroalkyl substances (PFAS) are man-made hazardous chemicals that are spread globally in the atmosphere and as a result they can be found in the rainwater and snow in even the most remote locations on Earth. During the last 20 years, guideline values for PFAS in drinking water, surface waters and soils have decreased dramatically due to new insights into their toxicity. As a result, the levels in environmental media are now ubiquitously above guideline levels.
… The Stockholm University team have conducted laboratory and field work on the atmospheric presence and transport of PFAS for the past decade. They have noted that the levels of some harmful PFAS in the atmosphere are not declining notably despite their phase out by the major manufacturer, 3M, already two decades ago. PFAS are known to be highly persistent, but their continued presence in the atmosphere is also due to their properties and natural processes that continually cycle PFAS back to the atmosphere from the surface environment.
… PFAS have been associated with a wide range of serious health harms, including cancer, learning and behavioral problems in children, infertility and pregnancy complications, increased cholesterol, and immune system problems.