Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Kentucky; Redesignation of the Kentucky Portion of the Cincinnati-Hamilton, OH-KY-IN 1997 Annual Fine Particulate Matter Nonattainment Area to Attainment

摘要

EPA is taking final action to approve a request submitted on January 27, 2011, from the Commonwealth of Kentucky, through the Kentucky Energy and Environment Cabinet, Division for Air Quality (DAQ), to redesignate the Kentucky portion of the Cincinnati-Hamilton, Ohio-Kentucky-Indiana (hereafter referred to as the "Tri-state Cincinnati-Hamilton Area") fine particulate matter (PM 2.5 ) nonattainment area to attainment for the 1997 Annual PM 2.5 National Ambient Air Quality Standards (NAAQS). The Tri-state Cincinnati-Hamilton Area is comprised of Boone, Campbell, and Kenton Counties in Kentucky (hereafter referred to as the "Northern Kentucky Area" or "Area"); Butler, Clermont, Hamilton, and Warren Counties in Ohio; and a portion of Dearborn County in Indiana. EPA's approval of the redesignation request is based on the determination that Kentucky has met the criteria for redesignation to attainment set forth in the Clean Air Act (CAA or Act). Additionally, EPA is approving a revision to the Kentucky State Implementation Plan (SIP) to include the 1997 Annual PM 2.5 maintenance plan for the Northern Kentucky Area that contains the new 2015 and 2021 motor vehicle emission budgets (MVEBs)