EPA has proposed a rule requiring companies to report their use of PFAS, which will affect a vast number of entities. As proposed, the rule requires businesses that import, process, or manufacture PFAS to detail these uses for the past 10 years (back to 2011). Information to be reported includes chemical identity, environmental and health effects, volumes processed and manufactured, worker exposure, categories of use, disposal, and by-products. No exceptions are expected to be allowed for small businesses, or for by-products, impurities, or substances formed during product use or aging. The comprehensive reporting requirement could be particularly burdensome to entities that have not previously been required to document or report usage of various substances. The rule was proposed in June 2021, with the public commenting period ending in September. The final rule is anticipated soon.