2060-AW64 202504 Unified Agenda of Federal Regulatory and Deregulatory Actions 2060 Office of Air and Radiation OAR 2000 Environmental Protection Agency EPA Revisitation of the 2024 Reconsideration 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 5 years. The Administrator is revisiting the 2024 decision on the NAAQS for Particulate Matter.

]]> Other Significant First Time Published in The Unified Agenda Proposed Rule Stage Yes No Deregulatory 40 CFR 50 42 U.S.C. 7401 et seq. Clean Air Act No NPRM 07/00/2025 Final Rule 01/00/2026 EPA-HQ-OAR-2015-0072. No Undetermined No No No No 2060-AV52 Related to Nicole Hagan 2060 Office of Air and Radiation OAR 919 541-3153 hagan.nicole@epa.gov 109 T.W. Alexander Drive, Mail Code C504-06, Research Triangle Park NC 27709 Patrick Dolwick 2060 Office of Air and Radiation OAR 919 541-5346 dolwick.pat@epa.gov 109 TW Alexander Drive, Durham NC 27711