Ozone Designations – 2015 Standards – Colorado State Recommendations and EPA Response

On December 20, 2017 EPA, Region 8 Regional Administrator Benevento notified Governor Hickenlooper that the EPA intends to concur with the State of Colorado’s recommendation for the 2015 Ozone National Ambient Air Quality Standard (NAAQS).  This includes maintaining the same nonattainment area boundary as for the 2008 Ozone NAAQS and designating all remaining counties in the State that were not designated last month as Attainment/Unclassifiable.  For more information, please visit https://www.epa.gov/ozone-designations/ozone-designations-2015-standards-colorado-state-recommendations-and-epa-response.