Approval and Promulgation of Air Quality Implementation Plans; Indiana; Redesignation of the Indiana Portion of the Louisville Area to Attainment of the 1997 Annual Standard for Fine Particulate Matter

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The Environmental Protection Agency (EPA) is granting Indiana's request to redesignate, under the Clean Air Act (CAA), the state of Indiana portion of the Louisville (KY-IN) (Madison Township in Jefferson County and Clark and Floyd Counties) nonattainment area to attainment of the 1997 annual standard for fine particulate matter (PM 2.5 ). EPA determined that the Louisville area has attained the 1997 annual standard, and proposed on July 11, 2013, with a supplemental proposal on June 23, 2016, to approve Indiana's request to redesignate the area. EPA is taking final action today on the proposal and supplemental proposal. EPA is also taking final action in this rulemaking on several related proposals. Along with granting the change in the area's designation status, EPA is also approving Indiana's PM 2.5 maintenance plan for the Louisville area as a revision to the Indiana state implementation plan (SIP) as meeting the requirements of section 175A of the CAA. EPA is approving the 2008 emissions inventory for primary PM 2.5 , nitrogen oxides (NO X ), sulfur dioxide (SO 2 ), volatile organic compounds (VOC) and ammonia as satisfying the requirement of the CAA for a comprehensive, curre