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.

• Fact Sheet: Determinations of Attainment by the Attainment Date, Determinations of Failure to Attain by the Attainment Date and Reclassification for Certain Nonattainment Areas for the 2006 24-Hour Fine Particulate Matter Standards (PDF)(3 pp, 73 K)