2060-AV64 202304 Unified Agenda of Federal Regulatory and Deregulatory Actions 2060 Office of Air and Radiation OAR 2000 Environmental Protection Agency EPA Reconsideration of the National Ambient Air Quality Standards for Ozone

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. On December 31, 2020, EPA published a final decision retaining the ozone (O3) NAAQS, which was the subject of petitions for reconsideration as well as petitions for judicial review. As directed in Executive Order 13990, "Protecting Public Health and the Environment and Restoring Science to Tackle the Climate Crisis,” signed by President Biden on January 20, 2021, EPA undertook a review of the December 2020 decision. Based on that review, EPA is undertaking a reconsideration of the December 31, 2020, decision. As part of this reconsideration, EPA is developing a policy assessment for the reconsideration to consider all of the policy-relevant information developed throughout the 2020 review, and to engage with the Clean Air Scientific Advisory Committee (CASAC) and a newly-constituted expert O3 panel.

]]> Other Significant Previously Published in The Unified Agenda Proposed Rule Stage Undetermined No 40 CFR 50 42 U.S.C. 7401 et seq CAA No Notice 04/29/2022 87 FR 25485 Notice 03/15/2023 88 FR 15940 NPRM 04/00/2024 Final Rule To Be Determined EPA-HQ-OAR-2018–0279. No No Undetermined No No https://www.epa.gov/naaqs/ozone-o3-air-quality-standards No No Mary Hutson 2060 Office of Air and Radiation OAR 919 541-0715 hutson.mary@epa.gov 109 T.W. Alexander Drive, Mail Code C504-06, Research Triangle Park NC 27709 Karen Wesson 2060 Office of Air and Radiation OAR 919 541-3515 wesson.karen@epa.gov 109 T.W. Alexander Drive, Mail Code C504-06, Research Triangle Park NC 27711