Initial Air Quality Designations for the 2024 Revised Primary Annual Fine Particle (PM2.5) National Ambient Air Quality Standards (NAAQS)

What it does

The U.S. Environmental Protection Agency (EPA) is providing notice of the Agency's intended approach for area designations for the 2024 primary annual fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS) (the 2024 annual PM<INF>2.5</INF> NAAQS) under Clean Air Act (CAA) section 107(d). Details regarding these designations, as well as the EPA's notifications to States, territories, and Tribes regarding their initial area designations are accessible via the Agency's website and public electronic docket. With this notice, the EPA is providing an opportunity for public comment on its intended approach for finalizing area designations during the comment period specified in the DATES section. The EPA sent notifications directly to applicable States, territories, and Tribes regarding their initial area designations on or about October 2, 2026, and anticipates promulgating final designations consistent with CAA requirements.

The Environmental Protection Agency's summary, as published in the Federal Register.

What it would change

1 part of Title 40 of the Code of Federal Regulations:

40 CFR 81

Before this

No earlier Federal Register document under regulation identifier 2060-AW33 since Jan. 1, 2025.

What happens next and when

Comments must be received on or before November 5, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-HQ-OAR-2024-0078 on Regulations.gov
• Title 40 on eCFR

The record as published

Source: the Federal Register (public domain). The document in the Federal Register