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EPA/OAR RIN: 2060-AV06 Publication ID: Spring 2021 
Title: Revised Air Quality Designations for the 2015 Ozone National Ambient Air Quality Standards; Response to the July 10, 2020 Court Decision 
Abstract: The EPA promulgated initial air quality designations for the 2015 ozone National Ambient Air Quality Standards (NAAQS) for all areas of the country in three actions. As part of the second action, promulgated on April 30, 2018, EPA designated 51 nonattainment areas. Subsequently, multiple petitioners filed six petitions for review of that designations action. Collectively, the petitioners challenged the designations of 17 counties associated with nine nonattainment areas, including nearby counties that EPA designated as attainment. On July 10, 2020, the court issued its decision remanding without vacatur all but one of the challenged counties to EPA for further consideration. Therefore, the affected designations remain in place pending the outcome of EPA's response to the court remand. In this final action, the EPA is addressing the remand by either revising the designations of the affected counties or affirming the April 30, 2018, designations. 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 81   
Legal Authority: 42 U.S.C. 7401 et seq. Clean Air Act   
Legal Deadline:
Action Source Description Date

Overall Description of Deadline: none

Action Date FR Cite
Final Rule  05/00/2021 
Additional Information: Docket #:EPA-HQ-OAR-2017-0548
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Carla Oldham
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code C539-04,
Research Triangle Park, NC 27711
Phone:919 541-3347
Fax:919 541-0824

Denise W. Scott
Environmental Protection Agency
Office of Air and Radiation
MD-15, 109 T.W. Alexander Drive,
Research Triangle Park, NC 27711
Phone:919 541-0870