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Air Quality in Indiana

Air Quality in Indiana > Nonattainment > Nonattainment Designations > Particulate Matter (PM 2.5) Nonattainment Designations Particulate Matter (PM 2.5) Nonattainment Designations

This webpage is dedicated to Indiana’s area designations for counties that do not meet the National Ambient Air Quality Standards (NAAQS) for fine particulate matter. Nonattainment areas are regions within the country where the concentration of one or more of the criteria pollutants exceeds the level set as the federal air quality standard.

Annual PM 2.5 Nonattainment Designations

December 12, 2013

24 Hour PM 2.5 Nonattainment Designations

February 18, 2009
December 22, 2008
October 20, 2008
October 2, 2008
August 18, 2008
June 13, 2008
May 30, 2008
December 17, 2007