Ozone (O3) Air Quality Attainment/Nonattainment Designations

All National Ambient Air Quality Standards (NAAQS) undergo periodic review and may be revised to reflect the latest health, environmental and technological advances. When a new standard is promulgated or an existing standard is revised, the first step in implementation is to determine which areas are, or are not, violating the NAAQS or are contributing to a violation of the NAAQS. During the “designation process,” states have the opportunity to submit data and recommendations, which U.S. EPA reviews and considers before issuing final designations. Following are documents relating to Indiana’s air quality designation process for the ozone NAAQS.

2015 Ozone Standard

February 16, 2018
December 20, 2017
November 16, 2017
November 6, 2017
September 16, 2016

2008 Ozone Standard

April 11, 2016
August 10, 2012
July 30, 2012
June 11, 2012
May 21, 2012
April 13, 2012
January 31, 2012
December 9, 2011
March 11, 2009