On 6 September, the US EPA released its proposed rule to add perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) to the list of hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), also known as Superfund.

If finalized, these hazardous substance designations could have a significant impact on many industries, from creating…