The Environmental Protection Agency on Tuesday proposed the first federal limits on so-called forever chemicals in public drinking water, a move that is expected to cost water utilities billions of dollars to filter out substances that have contaminated the water supplies of millions of people. The EPA is proposing maximum allowable levels for two compounds in a class of chemicals known as perfluoroalkyl and polyfluoroalkyl substances, or PFAS. Known as forever chemicals because they take a long time to break down, they were used for decades in carpeting, clothing, food packaging, firefighting foam and other consumer and industrial products. Once prized as innovative substances that could resist stains, water, grease and heat, PFAS are increasingly viewed as a threat because they persist in the environment and have been found in roughly 99% of the U.S. population. The move represents a seismic shift in the regulation of the nation’s drinking water, and will require sweeping changes for thousands of water systems that will have to test for and treat a group of chemicals that have been the subject of growing concern among public health officials and people worried about the safety of water coming from their taps.
Source: WSJ.com: US Business