The EPA is designating 13 Early Action Compact (EAC) Areas as attainment for the 8-hour ozone National Ambient Air Quality Standard (NAAQS). The EAC areas agreed to reduce ground-level ozone pollution earlier than the Clean Air Act (CAA) required and to demonstrate attainment with the 8-hour ozone NAAQS by December 31, 2007. The States in which these 13 areas are located have submitted quality-assured data indicating that the areas are in attainment for the 8-hour ozone NAAQS based on ambient air monitoring data from 2005, 2006 and 2007. In addition, consistent with EPA's implementing regulations, the 1-hour ozone NAAQS will no longer apply in each of these areas one year after the effective date of the designation. We are modifying the 8-hour ozone NAAQS tables in the regulations to reflect the attainment designation for the 13 EAC areas and the 1-hour ozone NAAQS tables in the regulations to reflect that the 1-hour standard will no longer apply in these areas as of April 15, 2009. Additionally, we are modifying the 8-hour and 1-hour ozone NAAQS tables in the regulations to reflect the nonattainment designation for the Denver EAC area, which became effective November 20, 2007 and to reflect that the 1-hour standard will no longer apply in that area as of November 20, 2008.