Air Quality Designations for Ozone

EPA uses technical information and recommendations from states and tribes to "designate" areas as attainment or nonattainment.

Nov 9, 2016 - Read state and tribal designation recommendations

Feb 29, 2016 - Guidance for states and tribes

Air Quality Designations for Ozone

This web site provides information on the process EPA, the states, and the tribes follow to designate areas as "attainment" (meeting) or "nonattainment" (not meeting) the ground-level ozone standards established in 2015.

EPA strengthened the air quality standards for ground-level ozone in 2015.