An official website of the United States government.

Particulate Matter (PM) Pollution

Determinations of Attainment, Failure to Attain and Reclassifications for the 2006 24-Hour PM Standards

On April 28, 2017, the U.S. Environmental Protection Agency completes determinations for 10 nonattainment areas for the 2006 24-hour fine particle standards. Based on requirements under the Clean Air Act, these areas were required to meet the standard by December 31, 2015.

See the final rule and fact sheet below.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.