On January 11, 2023, EPA’s Office of the General Counsel released a Cumulative Impacts Addendum (“Addendum”) to its May 2022 Legal Tools To Advance Environmental Justice, providing EPA and its tribal, state, and local partners a compilation of legal authorities to address cumulative impacts affecting environmental justice communities. In doing so, it reiterates the definition of “cumulative impacts” developed by EPA’s Office of Research and Development: the totality of exposures to combinations of chemical and non-chemical stressors (e.g., economy, community, home, school, demographics, safety) and their effects on public health and welfare. EPA noted that the Addendum is not comprehensive, nor does it prescribe when or how to address cumulative impacts. But it is a significant step in an evolving set of EPA regulatory interpretations to address cumulative impacts in various exposure scenarios (e.g., air emissions, spills, etc.) affecting environmental justice communities. You can read more about the Addendum here.