Laboratories Offering Home Testing
PFAS MCLs and Drinking Water
PFAS Sites and Areas of Interest
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.
Official Correspondence
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Last updated: September 2026
Michigan does not have specific numerical criteria for PFAS concentrations in foam on surface waters. Foam can contain harmful chemicals or bacteria, including high levels of PFAS.
The Michigan Department of Health and Human Services (MDHHS) recommends avoiding contact with foam. If you touch any foam, rinse off or bathe as soon as possible. Your skin is generally a good barrier to PFAS. However, touching foam without rinsing off or bathing can lead to accidentally swallowing foam and its contents.
Find more information at our PFAS foam on lakes and streams FAQ and check for MDHHS recommendations for avoiding foam on surface water.