The Environmental Protection Agency (EPA) is approving a submission by the State of North Carolina, through the Department of Air Quality (DAQ), received on April 23, 2021, to redesignate the Brunswick County, North Carolina, unclassifiable area (hereinafter referred to as the "Brunswick County Area" or "Area") to attainment/unclassifiable for the 2010 1-hour primary sulfur dioxide (SO<INF>2</INF>) national ambient air quality standard (hereinafter referred to as the "2010 1-hour SO<INF>2</INF> NAAQS"). Because EPA now has sufficient information to determine that the Brunswick County Area is attaining the 2010 1-hour SO<INF>2</INF> NAAQS, the Agency is approving the State's request to redesignate the Area from unclassifiable to attainment/unclassifiable for the 2010 1-hour SO<INF>2</INF> NAAQS.