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Nitrogen Dioxide Designations - Final Designations for 2010 Standard

January 20, 2012 – Based on the most recent air quality monitoring data (2008-2010), EPA has designated all areas of the country as unclassifiable/attainment.

Federal Register Notice (pdf) (57 pp, 347 KB) - Federal Register - Feb 17, 2012

Fact Sheet (pdf) (41.36 KB)