Approval and Promulgation of Air Quality Implementation Plans; The Commonwealth of KentuckyDisapproval of the Request to Redesignate the Kentucky Portion of the Cincinnati-Northern Kentucky Moderate Ozone Nonattainment Area to Attainment and the Associated Maintenance Plan

概要

EPA is disapproving the Commonwealth of Kentucky Natural Resources and Environmental Protection Cabinet's (Cabinet) request to redesignate the Kentucky portion of the Cincinnati-Northern Kentucky moderate ozone nonattainment area to attainment and the associated maintenance plan as a revision to the state implementation plan (SIP). The EPA determined that the area registered a violation of the ozone national ambient air quality standard (NAAQS). As a result, the Cincinnati-Northern Kentucky area no longer meets the statutory criteria for redesignation to attainment of the ozone NAAQS.