Data / Federal rules / 2026-01772

Air Plan Approval and Air Quality Designation; KY; Redesignation of the Kentucky Portion of the Louisville, KY-IN 2015 8-Hour Ozone Nonattainment Area to Attainment

The Environmental Protection Agency published this final rule in the Federal Register on January 29, 2026. It took effect on March 2, 2026.

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What the agency says

The Environmental Protection Agency (EPA) is denying the request to redesignate the Kentucky portion of the Louisville, Kentucky-Indiana, 2015 8-hour ozone nonattainment area (hereinafter referred to as the "Louisville, KY-IN Area" or "Area") to attainment for the 2015 8-hour ozone National Ambient Air Quality Standards (NAAQS or standards). EPA is taking no action at this time on Kentucky's maintenance plan, including the regional motor vehicle emission budgets for nitrogen oxides (NO<INF>X</INF>) and volatile organic compounds (VOC) for the years of 2019 and 2035, submitted with Kentucky's redesignation request for the Louisville, KY-IN Area. The redesignation request and the maintenance plan state implementation plan (SIP) revision were submitted by the Commonwealth of Kentucky, through the Kentucky Energy and Environment Cabinet (Cabinet), Division for Air Quality (KDAQ), on September 6, 2022.

Key facts

Document number: 2026-01772
Type: Final rule
Action: Final determination
Agency: Environmental Protection Agency
Published: January 29, 2026
Takes effect: March 2, 2026
Dates: This rule is effective March 2, 2026.
Docket: EPA-R04-OAR-2022-0789; FRL-10888-02-R4
Code of Federal Regulations: 40 CFR 81
Topics: Air pollution control; Environmental protection; Wilderness areas
Pages: 7

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Rules on wilderness areas · Published in January 2026

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.