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Planning & Attainment >> Ozone Non-Attainment Areas

New Ozone NAAQS and Proposed Revised Nonattainment Boundary Recommendations (January 2012) NCDAQ's comments on USEPA's January 6, 2010, proposed ozone standards NCDAQ Report on USEPA's Proposed Ozone Standards, March 25, 2010 8-Hour Ozone Nonattainment Boundary Recommendations (2008 Revised 8-Hour Ozone Standard, 0.075 ppm) Existing 8-hour Ozone Non-Attainment Areas in North Carolina (1997 8-Hour Ozone Standard, 0.08 ppm) NC 8-hour Ozone Design Values  EPA Ozone Non-Attainment Designations