You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.This page includes links to documents from the U.S. Government Publishing Office (GPO) website.

1. Revised 8-Hour Ozone (2015 Standard) NAAQS Notices
    
   1. Proposed rule - National Ambient Air Quality Standards for Ozone (December 17, 2014)
      See 79 FR 75234
   
   
   2. Final rule - National Ambient Air Quality Standards for Ozone (October 26, 2015)
      See 80 FR 65292
   
   
   3. Proposed rule - Implementation of the 2015 National Ambient Air Quality Standards for Ozone: Nonattainment Area Classifications and State Implementation Plan Requirements (November 17, 2016)
      See 81 FR 81276
   
   
   4. Final rule - Implementation of the 2015 National Ambient Air Quality Standards for Ozone: Nonattainment Area Classifications Approach (March 9, 2018)
      See 83 FR 10376
   
   
   5. Final rule - Implementation of the 2015 National Ambient Air Quality Standards for Ozone: Nonattainment Area State Implementation Plan Requirements (December 6, 2018)
      See 83 FR 62998


2. Revised 8-Hour Ozone (2015 Standard) Designation Notices
    
   1. Extension of Deadline for Promulgating Designations for the 2015 Ozone National Ambient Air Quality Standards (June 28, 2017). The deadline for the EPA to promulgate initial designations for the 2015 ozone NAAQS is October 1, 2018.
      See 82 FR 29246
   
   
   2. Final rule - Additional Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards (June 4, 2018)
      See 83 FR 25776
   
   
   3. Final rule - Additional Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards - San Antonio, Texas Area (July 25, 2018)
      See 83 FR 35136