PFAS are chemicals that resist grease, oil, water, and heat. They were first used in the 1940's and are now in hundreds of products including stain- and water-resistant fabrics and carpeting, cleaning products, paints, and fire-fighting foams.

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The widespread use of PFAS and their persistence in the environment means that PFAS from past and current uses have resulted in increasing levels of contamination of the air, water, and soil.

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They are known as 'forever chemicals' as they are extremely persistent in our environment and bodies. Exposure to some types of PFAS can lead to serious health problems such as liver damage, thyroid disease, obesity, fertility issues and cancer.