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EPA/OAR RIN: 2060-AS50 Publication ID: Spring 2019 
Title: Review of the National Ambient Air Quality Standards for Particulate Matter 

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 five years. On January 13, 2013, the EPA published a final rule revising the NAAQS for particulate matter to provide increased protection for public health. The current review includes the preparation of an Integrated Review Plan, an Integrated Science Assessment and, if warranted, a Risk/Exposure Assessment, and also a Policy Assessment by EPA, with opportunities for review by EPA's Clean Air Scientific Advisory Committee and the public. These documents will inform the Administrator's proposed decision as to whether to retain or revise the standards. This proposed decision will be published in the Federal Register with opportunity provided for public comment. The Administrator's final decisions will take into consideration these documents and public comment on the proposed decision.

Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Undetermined  Unfunded Mandates: No 
EO 13771 Designation: Other 
CFR Citation: 40 CFR 50   
Legal Authority: 42 U.S.C. 7401 et seq.   
Legal Deadline:  None
Action Date FR Cite
NPRM  03/00/2020 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Undetermined 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Scott Jenkins
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code C445-01,
Research Triangle Park, NC 27711
Phone:919 541-1167

Karen Wesson
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code C504-06,
Research Triangle Park, NC 27711
Phone:919 541-3515