Reconsideration of the National Ambient Air Quality Standards for Particulate Matter; Correction

摘要

The Environmental Protection Agency (EPA) is correcting a final rule published in the Federal Register on March 6, 2024, that became effective on May 6, 2024. The final rule revised the primary annual PM 2.5 standard by lowering the level from 12.0 [micro]g/m\3\ to 9.0 [micro]g/m\3\, retained the current primary 24- hour PM 2.5 standard and the primary 24-hour PM 10 standard, retained the secondary 24-hour PM 2.5 standard, secondary annual PM 2.5 standard, and secondary 24-hour PM 10 standard, and finalized revisions to the Air Quality Index (AQI) and monitoring requirements for the national ambient air quality standards for particulate matter (PM NAAQS). After publication, the EPA became aware of an error in the preamble text regarding the due date for infrastructure State implementation plan (infrastructure SIP) submissions for the 2024 p.m. NAAQS. With this action, the EPA is clarifying the due date for infrastructure SIP submissions for the 2024 p.m. NAAQS. The EPA is also correcting inadvertent errors in the PM 2.5 monitoring regulatory text. These corrections do not include any substantive changes to the final rule.