Nonattainment Designations Issued for the 2008 Ozone NAAQS

摘要

On May 21, 2012 (77 FR 30088-30160), EPA issued area designations for the 2008 ozone national ambient air quality standards (NAAQS). In the final rule, the agency has designated 45 areas as nonattainment. Seven of the areas are multi-state areas. The agency has designated one area, Uinta Basin, Wyoming, as unclassifiable because there is existing non-regulatory monitoring in the area that detected levels of ozone that exceed the NAAQS.