U.S. FEDRegulation
EPA approves Oklahoma plan for interstate SO2 pollution transport
The Environmental Protection Agency approved portions of Oklahoma's state implementation plan on October 8, 2026 demonstrating the state satisfies Clean Air Act interstate transport requirements for the 2010 1-hour sulfur dioxide national air quality standard. The requirement bars states from transporting pollution that significantly contributes to nonattainment or interferes with maintenance in other states. The rule takes effect November 9, 2026.
Key points
- Approves Oklahoma's showing on interstate transport for the 2010 1-hour SO2 NAAQS.Federal Register
- Covers the Clean Air Act duty to bar significant interstate pollution transport.Federal Register
- Published as 91 FR 64286; effective November 9, 2026.Federal Register
- Amends 40 CFR part 52 (Oklahoma implementation plan).Federal Register