Pre-empting changes in PFAS removal
With PFAS reported to be present in 610 locations across 43 states in the US, it raises the question of what are these “forever chemicals” and how did they get into water supplies?
Known as perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), these chemicals are part of a larger group referred to as per-and polyfluoroalkyl substances (PFAS).
Resistant to heat, grease and water, these manmade chemicals have been used in many consumer products, including non-stick saucepans, fire extinguisher foam and paints, from as far back as the 1940s.
While PFOA and PFAS are no longer manufactured in the US, they are still used in imported products.
Over the years they have found their way into the environment through landfill sites, conventionally treated wastewater and military sites and other sources, including PFAS manufacturing sites.
The video below from the Orange County Water District (OCWD) gives a great explanation of PFAS and why they are present in the environment.