You have probably heard a lot about per- and polyfluoroalkyl substances (PFAS) in the news and among scientific communities, especially in the last few years. PFAS are a large group of compounds that have been used widely to make everyday products resistant to stains, grease, and water. They are also a component of aqueous film-forming foams, which have been used for fire suppression at airports, industrial facilities, and military sites. PFAS contain carbon-fluorine bonds, which are among the strongest known in chemistry. Unfortunately, the chemical properties that make PFAS stable and desirable for so many applications and products also make them incredibly persistent in the environment.