“PFAS? What’s PFAS?” You may be hearing that term in the news as the federal government considers new rules and guidelines for the chemicals. Even if the acronym is new to you, you’re probably already familiar with what PFAS do. That’s because they’re found in everything from nonstick cookware to carpets to ski wax. PFAS stands for per- and polyfluoroalkyl substances, which are a large group of human-made chemicals – currently estimated to be around 9,000 individual chemical compounds – that are used widely in consumer products and industry. They can make products resistant to water, grease and stains and protect against fire.