Per and Polyfluoroalkyl substances, known as PFAS, are long-lasting chemicals that are resistant to heat and repel water and oil. They have been used for nearly 70 years in many industrial applications and consumer products like carpeting, water-resistant clothing, upholstery, food packaging, non-stick cookware, and personal care products. In addition, they have been used in fire-retarding foam and various industrial processes. Due to their widespread use and their persistence in the environment, PFAS are now found in water, air, fish, wildlife, and soil around the world. There are thousands of PFAS chemicals and their presence in the environment is an international issue.