Perfluorinated compounds are a group of human-made chemicals developed for use in products that resist heat, grease, oil, stains, and water. PFCs do not occur naturally. They are frequently found in coating additives, cosmetic products, dental floss, certain types of food packaging and clothing.

On April 9, a Colorado state water panel adopted new standards for PFOS and PFOA, two varieties of PFCs. The standard is 70 parts per trillion for each PFOS and PFOA.  As yet, there are no federal EPA PFOA or PFOS standards for drinking water or groundwater.

As of February 20, 2018, PFOA and PFOS were listed as Appendix VIII hazardous constituents by the Colorado Solid and Hazardous Waste Commission in the Colorado Hazardous Waste Regulations. The listing, which became effective on April 14, 2018, requires facilities to monitor and take necessary corrective actions, giving regulators the authority to hold polluters accountable and require cleanups to a safe standard.

Source:  https://www.fondriest.com/news/new-standards-target-perfluorinated-compounds-in-colorado.htm