Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Indiana; Redesignation of Lake and Porter Counties to Attainment of the 2008 Eight-Hour Ozone Standard

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The Environmental Protection Agency (EPA) is disapproving a December 5, 2012, request from the state of Indiana to redesignate Lake and Porter Counties to attainment of the 2008 ozone National Ambient Air Quality Standard (NAAQS or standard) because Indiana has not demonstrated that the Chicago-Naperville, Illinois-Indiana-Wisconsin (IL-IN-WI) ozone nonattainment area (Chicago nonattainment area), which includes Lake and Porter Counties, has attained this NAAQS. EPA is also disapproving Indiana's ozone maintenance plan and Motor Vehicle Emission Budgets (MVEBs) for Volatile Organic Compounds (VOC) and Nitrogen Oxides (NO X ), submitted with Indiana's ozone redesignation request.