Data / Federal rules / 2026-20640

Air Plan Approval; Oklahoma; Interstate Transport Requirements for the 2010 SO2 NAAQS

The Environmental Protection Agency published this final rule in the Federal Register on October 8, 2026. It takes effect on November 9, 2026.

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What the agency says

Pursuant to the Federal Clean Air Act (CAA or the Act), the U.S. Environmental Protection Agency (EPA) is approving portions of the State Implementation Plan (SIP) submittal from the State of Oklahoma demonstrating that the State satisfies the interstate transport requirements of the CAA for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) primary National Ambient Air Quality Standard (NAAQS). This provision requires each State's implementation plan to contain adequate requirements prohibiting the interstate transport of air pollution in amounts that will contribute significantly to nonattainment, or interfere with maintenance, of a NAAQS in any other State.

Key facts

Document number: 2026-20640
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: October 8, 2026
Takes effect: November 9, 2026
Dates: This rule is effective on November 9, 2026.
Docket: EPA-R06-OAR-2025-2270; FRL-13190-02-R6
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Environmental protection; Incorporation by reference; Sulfur oxides
Pages: 4

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 incorporation by reference · Published in October 2026

Read from the Federal Register API, last updated 2026-10-24. 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.