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 National Ambient Air Quality Standards

The Environmental Protection Agency (EPA) is making final determinations of attainment by the attainment date and determinations of failure to attain by the attainment date for ten nonattainment areas currently classified as ``Moderate'' for the 2006 24-hour fine particulate matter (PM2.5) National Ambient Air Quality Standards (NAAQS). Specifically, the EPA is determining that seven areas attained the 2006 24-hour PM2.5 NAAQS by December 31, 2015, based on complete, quality-assured and certified PM2.5 monitoring data for 2013 to 2015. The EPA is also determining that three areas failed to attain the 2006 24-hour PM2.5 NAAQS by December 31, 2015. Upon the effective date of such determinations of failure to attain the NAAQS, these three areas will be reclassified as ``Serious'' for the 2006 24-hour PM2.5 NAAQS by operation of law. States with jurisdiction over these nonattainment areas reclassified to Serious are required to submit State Implementation Plan (SIP) revisions that comply with the statutory and regulatory requirements for 2006 24-hour PM2.5 NAAQS nonattainment areas classified as Serious. In this action, the EPA is not making any final determination regarding its proposed determination for the Logan, Utah-Idaho, nonattainment area.