Study: Most rainwater on Earth contains PFAS exceeding safe levels

New research from Stockholm University shows that PFAS in rainwater around the world are exceeding safe levels. Per- and polyfluoroalkyl substances (PFAS) are chemical pollutants, often called “forever chemicals” present in many everyday items, like food packaging and clothing. The chemicals leach into the environment, affecting everything from the air we breathe to even rainfall.

The study, published in Environmental Science & Technology, tested four selected perfluoroalkyl acids (PFAAs): perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA), perfluorohexanesulfonic acid (PFHxS), and perfluorononanoic acid (PFNA) in rainwater, soil, and surface waters in different locations globally.

The researchers concluded that PFOA and PFOS levels in rainwater “greatly exceed” the Lifetime Drinking Water Health Advisory levels from the U.S. Environmental Protection Agency (EPA). The study also noted that all four of the tested PFAAs in rainwater were often above the Danish drinking water limits, and PFOS levels were usually higher than the Environmental Quality Standard for Inland European Union Surface Water.

Rainwater wasn’t the only problem, either. “Atmospheric deposition also leads to global soils being ubiquitously contaminated and to be often above proposed Dutch guideline values,” the study said.

As such, the authors said there is really no way to avoid these chemicals on Earth anymore.