This section provides detailed information about designations, classifications and the nonattainment area status for the PM-2.5 (2006) National Ambient Air Quality Standards (NAAQS). Original areas were designated December 14, 2009. All of the areas designated nonattainment for the 2006 PM-2.5 standard violated the 24-Hour standard.

1. All Designated Area Selections (Nonattainment and Maintenance)
   1. Area/State Information
   2. Area Design Values
   3. State/Area and Design Value Information
   4. State/County/Area Information
   5. State/Area/County List
   6. Area/State/County List


2. Nonattainment Area Selections
   1. Areas by Classification
   2. State/County/Area Information
   3. State/Area/County List
   4. Area/State/County List


3. Maintenance Area Selections (Redesignated from Nonattainment)
   1. Areas by Classification
   2. State/County/Area Information
   3. State/Area/County List
   4. Area/State/County List


4. Area Maps
   Map and GIS shapefile downloads are available from the Downloads page (see sidebar link)
    
   1. National Maps
      1. National Map of PM-2.5 (2006) Nonattainment Areas
      2. Counties Designated Nonattainment for the 1997, 2006 and/or 2012 PM-2.5 Standards - U.S. Map
   
   
   2. State Maps
      1. Individual State Maps with PM-2.5 (2006) Nonattainment Areas
      2. Individual State Maps with PM-2.5 (2006) Maintenance Areas
   
   
   3. Interactive Map with Current Status of PM-2.5 (2006) Nonattainment/Maintenance Areas


5. Other Information
   1. Summary Reports
      1. Nonattainment Area Summary Report
      2. Maintenance Area Summary Report
      3. Nonattainment Area Summary Report w/ History
   
   
   2. Comparison to Other Standards
      1. Areas Designated Nonattainment for the 1997, 2006 and/or 2012 PM-2.5 Standards
   
   
   3. Designation and NAAQS Information Related to the 2006 PM-2.5 Standard


6. Federal Register Notices Related to PM-2.5 (2006) Areas
   1. Clean Data Determination/Attainment Determinations for Areas with Current Nonattainment Status
   
   
   2. Attainment Date Extensions
   
   
   3. Classification Changes
   
   
   4. All Federal Register Notices
      1. Notices Listed By Category
      2. Notices Listed By Area Name
      3. Notices Listed By State then Area
      4. Notices Listed By Date