Air Plan Approval and Designation of Areas; MS; Redesignation of the DeSoto County, 2008 8-Hour Ozone Nonattainment Area to Attainment

On December 11, 2015, the State of Mississippi, through the Mississippi Department of Environment Quality (MDEQ), submitted a request for the Environmental Protection Agency (EPA) to redesignate the portion of Mississippi that is within the Memphis, Tennessee- Mississippi-Arkansas (Memphis, TN-MS-AR) 2008 8-hour ozone nonattainment area (hereafter referred to as the ``Memphis, TN-MS-AR Area'' or ``Area'') and a related State Implementation Plan (SIP) revision containing a maintenance plan for the Area. EPA is taking the following separate final actions related to the December 11, 2015, redesignation request and SIP revision: Determining that the Memphis, TN-MS-AR Area is attaining the 2008 8-hour ozone national ambient air quality standards (NAAQS); approving the State's plan for maintaining attainment of the 2008 8-hour ozone NAAQS in the Area, including the motor vehicle emission budgets (MVEBs) for nitrogen oxides (NOX) and volatile organic compounds (VOC) for the year 2027 for the Mississippi portion of the Area, into the SIP; and redesignating the Mississippi portion of the Area to attainment for the 2008 8-hour ozone NAAQS. Additionally, EPA finds the 2027 MVEBs for the Mississippi portion of the Area adequate for the purposes of transportation conformity.