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Bookmark or Share- Nonattainment Areas for Criteria Pollutants (Green Book)This site provides current information on nonattainment areas by state and pollutant. Areas of the country where air pollution levels persistently exceed the national ambient air quality standards may be designated "nonattainment."
- Current Nonattainment Counties for All Criteria PollutantsLearn about Clean Air Act nonattainment area and county information for criteria pollutants.
- Air Quality Designations 101 - U.S. Environmental Protection AgencyDetermining Nonattainment Area Boundaries. Designations focus is on defining Nonattainment Area boundaries. The Clean Air Act directs EPA to designate as nonattainment an area that is violating the NAAQS and nearby areas with emissions that contribute to the violation(s).
- Counties Designated Nonattainment | Green Book | US EPALearn about Clean Air Act nonattainment area and county information for criteria pollutants.
- Green Book National Area and County-Level Multi-Pollutant InformationNonattainment/Maintenance Area Status for Each County by Year for All Criteria Pollutants. These state/county reports list the annual nonattainment and maintenance status of each county by designated area name by NAAQS.
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