U.S. FEDRegulation
EPA approves Louisville maintenance plan for 1997 ozone standards
The Environmental Protection Agency approved a Kentucky state implementation plan revision on October 8, 2026 adopting a limited maintenance plan for the Kentucky portion of the bi-state Louisville, Kentucky-Indiana 1997 8-hour ozone maintenance area. The plan covers Bullitt, Jefferson and Oldham counties and makes the area's ozone maintenance commitments federally enforceable through the second 10-year maintenance period. It takes effect November 9, 2026.
Key points
- Covers Bullitt, Jefferson and Oldham counties in the bi-state Louisville maintenance area.Federal Register
- Revision submitted by Kentucky's Energy and Environment Cabinet on June 3, 2024 for the Louisville Metro Air Pollution Control District.Federal Register
- Makes maintenance commitments for the 1997 8-hour ozone standard federally enforceable.Federal Register
- Published as 91 FR 64297; effective November 9, 2026.Federal Register
- Amends 40 CFR part 52 (Kentucky implementation plan).Federal Register