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EPA/OAR RIN: 2060-AU54 Publication ID: Spring 2021 
Title: Implementation of the Revoked 1997 8-Hour Ozone National Ambient Air Quality Standards; Updates to 40 CFR Part 52 for Areas that Attained by the Attainment Date 
Abstract: The EPA is issuing a final rule to make updates to the regulatory text in 40 CFR part 52 to reflect EPA's factual finding that certain nonattainment areas attained the revoked 1997 8-hour ozone NAAQS by their respective attainment dates, and, therefore, were not required to implement antibacksliding obligations associated with failure to timely attain. EPA is adopting these part 52 updates in a final rule. 
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 52   
Legal Authority: 42 U.S.C. 7401 et seq.   
Legal Deadline:
Action Source Description Date
None       
Timetable:
Action Date FR Cite
NPRM  10/09/2020  85 FR 64089   
Direct Final Rule  10/09/2020  85 FR 64046   
Notice  12/09/2020  85 FR 79129   
Final Rule  06/00/2021 
Additional Information: Docket #:EPA-HQ-OAR-2019-0611
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, State 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Virginia Raps
Environmental Protection Agency
Office of Air and Radiation
C539-01,
Research Triangle Park, NC 27711
Phone:919 541-4383
Email: raps.virginia@epa.gov

Butch Stackhouse
Environmental Protection Agency
Office of Air and Radiation
C539-01,
Research Triangle Park, NC 27711
Phone:919 541-5208
Fax:919 541-0824
Email: stackhouse.butch@epa.gov