In accordance with the Clean Air Act (CAA), the Environmental Protection Agency (EPA) is redesignating the Ohio portion of the Steubenville Ohio-West Virginia interstate sulfur dioxide (SO<INF>2</INF>) nonattainment area (Steubenville nonattainment area) from nonattainment to attainment. EPA is also approving Ohio's maintenance plan. Emissions of SO<INF>2</INF> in the area have been reduced and the air quality in the nonattainment area is currently well below the 2010 SO<INF>2</INF> national ambient air quality standard (NAAQS).