USEPA Releases Updated PFBS Toxicity Assessment

The U.S. Environmental Protection Agency (USEPA) is releasing an updated toxicity assessment for perfluorobutane sulfonic acid (PFBS), a member of a larger group of per- and polyfluoroalkyl substances (PFAS). A toxicity assessment is a written summary of the potential health effects associated with a chemical and identifies the dose levels at which those health effects may occur in order to calculate toxicity values.

PFBS has been identified in environmental media and consumer products, including surface water, wastewater, drinking water, dust, carpeting, carpet cleaners, and floor wax. The assessment is part of the USEPA’s efforts to increase the amount of research and information that is publicly available on chemicals in the PFAS family.

USEPA, Federal agencies, States, Tribes, and local communities can use the PFBS toxicity assessment, along with specific exposure and other relevant information, to determine if and when it is necessary to take action to address potential health risks associated with human exposures to PFBS under appropriate regulations and statutes.

Visit the USEPA website for more information on PFAS: For more information on the updated PFBS toxicity assessment, visit: