CNN —Potentially toxic chemicals called PFAS (perfluoroalkyl and polyfluoroalkyl substances) are found in surface and groundwaters around the world at levels much higher than many international regulators allow, a new study found. Groundwater can be contaminated by PFAS from food and consumer products added to landfills as well as from manufacturing facilities. Public concern led to a commitment by manufacturers in 2008 to phase out use of PFOA and PFOS, two of the most widely used chemicals. Generally PFAS concentrations are higher in urban areas or areas that used PFAS products extensively, O’Connell said, but it is also leached into the environment in ways that may not be obvious. “Another example is that PFAS used to be used in ski wax, so pristine environments, where people ski, have PFAS in their waters and soils,” he said.

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Persons: Mario Tama, ”, David Andrews, Andrews, ” Andrews, “, Denis O’Connell, O’Connell, ” O’Connell Organizations: CNN, US Environmental Protection Agency, Health Canada, EPA, National Academies of Sciences, Engineering, Medicine . Studies, Environmental, Agency, Toxic Substances, Disease, Nature, University of New, Geological Survey, NSF, National Sanitation Foundation Locations: Mount Everest, Medicine, University of New South Wales, Sydney