Data / Federal rules / 2026-04127

Removal of the Federal Reformulated Gasoline Program From the Kentucky Portion of the Louisville Area

The Environmental Protection Agency published this final rule in the Federal Register on March 2, 2026. It took effect on May 27, 2026.

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What the agency says

The U.S. Environmental Protection Agency (EPA) is announcing the approval of the petition by the Commonwealth of Kentucky ("Kentucky" or "the Commonwealth") to opt out of the reformulated gasoline (RFG) program and remove the requirement to sell RFG in Jefferson County and parts of Bullitt and Oldham Counties (the "Kentucky portion of the Louisville Area"), which are part of the Louisville Moderate nonattainment area for the 2015 ozone National Ambient Air Quality Standard (NAAQS) and the maintenance area for the 1997 ozone NAAQS. Specifically, by letter dated February 26, 2026, to the Governor of Kentucky, the EPA has approved the Commonwealth's petition and set an effective date for the opt-out from the RFG program as May 27, 2026. The EPA has determined that this removal of the RFG program for the Kentucky portion of the Louisville Area is consistent with the applicable provisions of the Clean Air Act (CAA) and the EPA's regulations.

Key facts

Document number: 2026-04127
Type: Final rule
Action: Notification of final action on petition
Agency: Environmental Protection Agency
Published: March 2, 2026
Takes effect: May 27, 2026
Dates: The effective date for removal of the Kentucky portion of the Louisville Area from the RFG program is May 27, 2026. Any petition for review shall be filed in the appropriate United States Court of Appeals no later than May 1, 2026.
Docket: EPA-HQ-OAR-2025-2039; FRL 13037-01-OAR
Code of Federal Regulations: 40 CFR 1090
Pages: 5

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Published in March 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.