The U.S. Environmental Protection Agency (EPA) has reopened the public comment period concerning responses to states and tribes’ proposed air quality designations for the 2010 1-hour Sulfur Dioxide (SO2) National Ambient Air Quality Standard (NAAQS). As recommended by the Florida Department of Environmental Protection, EPA has proposed designating portions of Hillsborough and Nassau Counties as nonattainment. EPA’s responses are available here. Comments are due by April 8, 2013. EPA is expected to make final air quality designations for areas addressed in its responses by June 2013. Contact Joseph Brown for additional information.