The USEPA is approving, in final, requests for exemptions from the nitrogen oxides (NO<INF>X) requirements as provided for in Section 182(f) of the Clean Air Act (Act) for the following ozone nonattainment areas in Ohio: Canton (Stark County); Cincinnati (Butler, Clermont, Hamilton and Warren Counties); Cleveland (Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Medina, Portage and Summit Counties); Columbus (Delaware, Franklin, and Licking Counties); Youngstown (Mahoning and Trumbull Counties); Steubenville (Columbiana and Jefferson Counties); Preble County; and Clinton County. These exemption requests, submitted by the Ohio Environmental Protection Agency (OEPA), are based upon three years of ambient air monitoring data which demonstrate that the National Ambient Air Quality Standard (NAAQS) for ozone has been attained in each of these areas without additional reductions of NO<INF>X.