The Environmental Protection Agency (EPA) is finalizing approval of the State of Florida's March 10, 2015, State Implementation Plan (SIP) revision, submitted by the Florida Department of Environmental Protection (FDEP). This submittal fulfills Florida's commitment to EPA to provide a regional haze SIP revision with a Best Available Retrofit Technology (BART) nitrogen oxides (NOx) emissions limit for Unit 1 at the Lakeland Electric--C.D. McIntosh Power Plant (McIntosh) reflecting best operating practices for good combustion. States are required to address the BART provisions of the Clean Air Act (CAA or Act) and EPA's regional haze regulations as part of a program to prevent any future and remedy any existing anthropogenic impairment of visibility in mandatory Class I areas (national parks and wilderness areas) caused by emissions of air pollutants from numerous sources located over a wide geographic area (also referred to as the "regional haze program") and to assure reasonable progress toward the national goal of achieving natural visibility conditions in Class I areas. In this action, EPA is approving the BART NOx emissions limit for Unit 1 at McIntosh into the Florida SIP.