Forever chemicals

"Forever chemicals" is a nickname, not a scientific term. It points to one real trait of PFAS: they last. EPA says a common concern is that many break down very slowly and can build up in people, animals and the environment over time.

Missouri DNR repeats the same point and adds that they can be found in water, soil, air and food.

The name can sound like a promise that nothing can be done. That is not right. Treatment exists. EPA lists activated carbon, ion exchange resins and high-pressure membranes as technologies shown to remove PFAS from drinking water. See granular activated carbon for one of them.

Because the chemicals persist, early testing matters. A small source can become a larger plume in soil and groundwater. For owners of industrial, firefighting or landfill-adjacent sites, a baseline test costs little next to a surprise later.

Read parts per trillion to understand how tiny the measured amounts are.