Data / Federal rules / 2024-00658

Air Plan Approval; Illinois; NAAQS Update

The Environmental Protection Agency published this final rule in the Federal Register on January 17, 2024. It took effect on February 16, 2024.

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What the agency says

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the Illinois Environmental Protection Agency (IEPA) on July 8, 2022. Illinois revised its air pollution control rules entitled "Part 243--Ambient Air Quality Standards" and updated the "List of Designated Reference and Equivalent Methods" in response to EPA rulemakings and changes to the National Ambient Air Quality Standards (NAAQS) that EPA adopted in 2021.

Key facts

Document number: 2024-00658
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: January 17, 2024
Takes effect: February 16, 2024
Dates: This final rule is effective on February 16, 2024.
Docket: EPA-R05-OAR-2022-0673; FRL-10900-02-R5
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Carbon monoxide; Environmental protection; Incorporation by reference; Intergovernmental relations; Ozone; Particulate matter; Sulfur oxides; Volatile organic compounds
Pages: 3

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on carbon monoxide · Rules on environmental protection · Published in January 2024

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.