As noted in the press release, guideline values for PFAS in drinking water, surface waterways and soils have declined significantly over the past two decades due to new knowledge about their toxicity. Thus, levels in environmental media are currently almost always above the recommended range. In this regard, the study asserts that the PFAS defines a new planetary boundary for new entities that have been overtaken.
“There has been an astonishing decline in guideline values for PFAS in drinking water over the past 20 years. For example, the drinking water guideline value for a well-known PFAS-class substance, the carcinogenic perfluorooctanoic acid (PFOA), has decreased 37.5 million times in the United States,” said Ian. Cousins, the lead author of the study. studies and professor in the Department of Environmental Sciences at Stockholm University.
“Based on the latest U.S. guidelines for PFOA in drinking water, rainwater everywhere would be deemed unsafe to drink. Although in the industrial world we don’t often drink rainwater, many people around the world expect it to be safe to drink and it powers many of our drinking water sources,” Cousins continued.
A review from the United States Centers for Disease Control and Prevention (CDC) indicates that possible health risks from exposure to PFAS may be underestimated, describing them as cancer, liver damage, fertility and increased risk of asthma and thyroid disease.