Ask AI
R42934

Air Quality: EPA’s 2013 Changes to the Particulate Matter (PM) Standard

Published Dec 23, 2015Updated Jun 21, 2025

The Congressional Research Service is a nonpartisan policy and legal analysis arm of the Library of Congress. CRS reports are written for members of Congress and their staff, not the public — but they’re made available openly through Congress.gov.

Air Quality: EPA’s 2013 Changes to the Particulate Matter (PM) Standard — Informed