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PFAS Foam

PFAS Foam

The words “PFAS foam” can mean one of two things:

  • On lakes and streams, the movement of wind and waves can create foam that floats on top of the water or blows on shore.  This foam may or may not contain PFAS.  
  • PFAS may also be in certain firefighting foams. These foams are most commonly known as Aqueous Film Forming Foam (AFFF) or Class B foam.
  • A firefighter spraying bright white foam at a fire

    Firefighting foam

    There are two major classes of firefighting foam: Class A and Class B. Class B is also called Aqueous film forming foam (AFFF) and is usually created using PFAS. It is a highly effective foam used for fighting high-hazard flammable liquid fires, like gasoline, oil, and jet fuel.

  • A large pile of fluffy white PFAS foam on a sandy beach

    Foam on lakes and streams

    Foam can be naturally occurring foam or foam formed because of environmental pollution.