What Are PFAS? PFAS are commonly called “forever chemicals” that have been discovered in nearly every human’s blood and have a number of negative health impacts. Seneca Lake Guardian has worked with other organizations to push for a lower acceptable limit of PFAS contamination in water by the state, worked on getting more PFAS testing within our community, better informing the public on PFAS contamination, remediation/ cleanup of these contaminants in our water.