Environmental Protection Agency: Air Quality Designations for Ozone
The Clean Air Act requires EPA to designate areas in the United States after the agency sets a new National Ambient Air Quality Standard (NAAQS) or revises an existing standard.
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 EPA strengthened in 2015.
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The Clean Air Act requires EPA to designate areas in the United States after the agency sets a new National Ambient Air Quality Standard (NAAQS) or revises an existing standard.
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 EPA strengthened in 2015.