Data / Federal rules / 2025-16468

Air Plan Approval; South Dakota; Regional Haze Plan for the Second Implementation Period

The Environmental Protection Agency published this final rule in the Federal Register on August 28, 2025. It took effect on September 29, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is approving a regional haze state implementation plan (SIP) revision submitted by the State of South Dakota on July 29, 2022 (South Dakota's 2022 SIP submission), as satisfying applicable requirements under the Clean Air Act (CAA) and the EPA's Regional Haze Rule (RHR) for the program's second implementation period. The EPA is taking this action pursuant to CAA.

Key facts

Document number: 2025-16468
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: August 28, 2025
Takes effect: September 29, 2025
Dates: This rule is effective on September 29, 2025.
Docket: EPA-R08-OAR-2024-0609; FRL-12596-02-R8
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Carbon monoxide; Environmental protection; Greenhouse gases; Incorporation by reference; Intergovernmental relations; Lead; Nitrogen dioxide; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
Pages: 3

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on carbon monoxide · Rules on environmental protection · Published in August 2025

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.