PFAS, what is it, why is it in our environment and why is it a problem? | pfasfree.org.uk PFAS are a group of over 4700 industrial chemicals, widely used in everyday products from food packaging 2[2] Rosenmai, A.K., Taxvig, C., Svingen, T., Trier, X. https://www.pfasfree.org.uk/about-pfas