Open for CommentEPA· Environmental Protection AgencyProposed Rule

Proposed approval of the Illinois Regional Haze Plan for the Second Implementation Period and Infrastructure Approvals for the 2012 PM2.5 and 2015 Ozone NAAQS

Introduced February 27, 2026Comment period ends March 31, 2026View on regulations.gov ↗
💬 Closes in 12 daysDeadline: Mar 31, 2026

What This Means

The EPA is approving Illinois's plan to reduce air pollution that causes hazy skies, as well as confirming that Illinois has the necessary systems in place to meet federal air quality standards for fine particle pollution and ozone. This affects Illinois residents and businesses by setting requirements for how power plants, factories, and other sources must limit their pollution emissions over the coming years. The approval matters because it helps ensure cleaner air for people to breathe while allowing the state flexibility in how it meets these federal air quality goals.

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Details

TypeFederal Regulation
AgencyEPA · Environmental Protection Agency
Regulations.gov IDEPA-R05-OAR-2024-0261-0001
IntroducedFebruary 27, 2026
Comment DeadlineMarch 31, 2026

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