# National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma
> **Rule** · Final rule. · Published 2025-06-20 · Effective 2025-07-21 · 90 FR 26213
## Document
- **Document number:** 2025-11265
- **Category:** air-emissions
- **Federal Register citation:** 90 FR 26213
- **CFR reference:** 40 CFR 61
- **Publication date:** 2025-06-20
- **Effective date:** 2025-07-21
- **State:** OK
- **EPA docket:** EPA-R06-OAR-2020-0086
## Abstract

The Oklahoma Department of Environmental Quality (ODEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources, as provided for under previously approved delegation mechanisms. The updated State regulations incorporate by reference certain NESHAP promulgated by the Environmental Protection Agency (EPA), as they existed through June 30, 2022. The EPA is providing notice that it is taking final action to approve the delegation of certain NESHAP to ODEQ. The final delegation of authority under this action applies to sources located in certain areas of Indian country as discussed herein.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/06/20/2025-11265/national-emission-standards-for-hazardous-air-pollutants-delegation-of-authority-to-oklahoma)
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