The purpose of this September 2011 memorandum is to clarify for state and local air agencies the status of the 2008 ozone NAAQS and to outline implementation steps moving forward.
To learn more about the implementation rule, visit the 2008 Ozone NAAQS Implementation Rule page.
You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Implementation of the Ozone National Ambient Air Quality Standard Memorandum (PDF)(4 pp, 645 K, September 22, 2011)