EPA announced the availability of the final report, Supplement to the 2019 Integrated Science Assessment for Particulate Matter, as announced in the Federal Register on April 14, 2022.

Citation:

U.S. EPA. Supplement to the 2019 Integrated Science Assessment for Particulate Matter (Final Report, 2022). U.S. Environmental Protection Agency, Washington, DC, EPA/635/R-22/028, 2022.

Impact/Purpose:

The Clean Air Act requires EPA to periodically review the science for six major air pollutants, including particulate matter (PM). EPA's Center for Public Health and Environmental Assessment (CPHEA) develops Integrated Science Assessments (ISAs) that summarize the science related to the health and welfare effects of these pollutants. ISAs provide a comprehensive review of the policy-relevant scientific literature published since the last National Ambient Air Quality Standards (NAAQS) review and are a critical part of the scientific basis for updating the NAAQS.

The final Supplement to the 2019 Integrated Science Assessment for Particulate Matter builds on the PM ISA and represents EPA’s targeted evaluation of the latest scientific literature on the potential health and welfare effects associated with PM. The final Supplement and PM ISA collectively forms the scientific basis of the reconsideration of the 2020 PM NAAQS.

Description:

The 2019 Integrated Science Assessment for Particulate Matter (PM ISA) provides the scientific foundation for review of the primary and secondary National Ambient Air Quality Standards (NAAQS) for particulate matter (PM). The PM ISA contains an evaluation and synthesis of policy-relevant scientific evidence communicating critical science judgments about the relationships between PM and health effects, including those in at-risk populations, which can comprise communities with environmental justice concerns, and welfare effects, specifically the nonecological welfare effects of visibility impairment, climate forcing, and materials damage.

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