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EPA/OAR RIN: 2060-AW64 Publication ID: Spring 2025 
Title: ●Revisitation of the 2024 Reconsideration of the National Ambient Air Quality Standards for Particulate Matter 
Abstract:

Under the Clean Air Act Amendments of 1977, EPA is required to review and if appropriate revise the air quality criteria for the primary (health-based) and secondary (welfare-based) national ambient air quality standards (NAAQS) every 5 years. The Administrator is revisiting the 2024 decision on the NAAQS for Particulate Matter.

 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Yes  Unfunded Mandates: No 
EO 14192 Designation: Deregulatory 
CFR Citation: 40 CFR 50   
Legal Authority: 42 U.S.C. 7401 et seq. Clean Air Act   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  07/00/2025 
Final Rule  01/00/2026 
Additional Information: EPA-HQ-OAR-2015-0072.
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Undetermined 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Related RINs: Related to 2060-AV52 
Agency Contact:
Nicole Hagan
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code C504-06,
Research Triangle Park, NC 27709
Phone:919 541-3153
Email: hagan.nicole@epa.gov

Patrick Dolwick
Environmental Protection Agency
Office of Air and Radiation
109 TW Alexander Drive,
Durham, NC 27711
Phone:919 541-5346
Email: dolwick.pat@epa.gov