The Environmental Protection Agency (EPA) is finalizing approval of a State Implementation Plan (SIP) revision to the Jefferson County portion of the Kentucky SIP submitted by the Commonwealth of Kentucky through the Kentucky Division for Air Quality (KDAQ) to EPA on August 12, 2020. The SIP revision was submitted by KDAQ on behalf of the Louisville Metro Air Pollution Control District (LMAPCD) to address the emissions statement requirements for the 2015 8-hour ozone national ambient air quality standards (NAAQS) for the Jefferson County portion of the Louisville, Kentucky 2015 8-hour ozone nonattainment area (hereinafter referred to as "Jefferson County"). Jefferson County is part of the Kentucky portion of the Louisville, Kentucky-Indiana 2015 8-hour ozone nonattainment area (hereinafter referred to as "the Louisville, KY Area") which is comprised of Bullitt, Jefferson, and Oldham Counties in Kentucky. EPA will consider the emissions statement requirements for the Bullitt and Oldham portions of the Louisville, KY Area in a separate action. This action is being taken pursuant to the Clean Air Act (CAA or Act).