Data / Federal rules / 2025-23284

New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana

The Environmental Protection Agency published this final rule in the Federal Register on December 18, 2025. It took effect on January 20, 2026.

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What the agency says

The Louisiana Department of Environmental Quality (LDEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources (both part 70 and non-part 70 sources), as provided for under previously approved delegation mechanisms. The updated State regulations incorporate by reference certain NSPS and NESHAP promulgated by the Environmental Protection Agency (EPA) at parts 60, 61 and 63, as they existed through July 1, 2021. The EPA is providing notice that it is taking final action to approve the delegation of certain NSPS and NESHAP to LDEQ. The delegation of authority under this action does not apply to sources located in Indian country.

Key facts

Document number: 2025-23284
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: December 18, 2025
Takes effect: January 20, 2026
Dates: This rule is effective on January 20, 2026.
Docket: EPA-R06-OAR-2010-1054; FRL-12688-02-R6
Code of Federal Regulations: 40 CFR 60; 40 CFR 61; 40 CFR 63
Topics: Administrative practice and procedure; Air pollution control; Business and industry; Carbon oxides; Environmental protection; Hazardous substances; Intergovernmental relations; Nitrogen oxides; Ozone; Radioactive materials; Reporting and recordkeeping requirements; Sulfur oxides; Uranium; Vinyl chloride; Volatile organic compounds
Pages: 9

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on administrative practice and procedure · Rules on air pollution control · Rules on business and industry · Published in December 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.