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Nitrogen Dioxide (1979 Standard) Area Information


This page provides detailed information on the previous nitrogen dioxide area originally designated in nonattainment. As of September 22, 1998, the nitrogen dioxide area has been redesignated to a maintenance area.

  1. Maintenance Area Selections (Redesignated from Nonattainment)
    1. Classified Area

  2. Federal Register Notices and Related Nitrogen Dioxide Designation Information
    1. Nitrogen Dioxide Standards website

    2. Designation Notices
      1. Proposed Primary National Ambient Air Quality Standard for Nitrogen Dioxide (July 15, 2009) (PDF)
      2. Final Air Quality Designations for the 2010 Primary Nitrogen Dioxide (NO2) National Ambient Air Quality Standards (February 17, 2012) (PDF)
      3. Proposed Technical Amendments to Inadvertent Errors in Air Quality Designations for Fine Particles, Ozone, Lead, Nitrogen Dioxide, and Sulfur Dioxide (May 5, 2014) (PDF)
      4. Direct Final Technical Amendments to Inadvertent Errors in Air Quality Designations for Fine Particles, Ozone, Lead, Nitrogen Dioxide, and Sulfur Dioxide (May 5, 2014) (PDF)

    3. Other Associated Federal Register Notices
      1. Federal Register Notices Relating to NO2 Designations Listed by Date


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