The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Kentucky, through the Kentucky Division for Air Quality (KDAQ) on August 9, 2016, that addresses reasonably available control measures (RACM) for the Kentucky portion of the Louisville, KY-IN, nonattainment area for the 1997 Annual fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standards (NAAQS) (hereinafter referred to as the "bi-state Louisville Area" or "Area").