# Air Plan Approval; AK; Regional Haze State Implementation Plan for the Second Implementation Period
> **Rule** · Final rule. · Published 2026-03-03 · Effective 2026-04-02 · 91 FR 10339
## Document
- **Document number:** 2026-04159
- **Category:** air-emissions
- **Federal Register citation:** 91 FR 10339
- **CFR reference:** 40 CFR 52
- **Publication date:** 2026-03-03
- **Effective date:** 2026-04-02
- **EPA docket:** EPA-R10-OAR-2023-0348
## Abstract

The Environmental Protection Agency (EPA) is approving the Alaska regional haze plan for the second implementation period. Alaska submitted the plan to address applicable requirements under the Clean Air Act and the EPA's Regional Haze Rule.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/03/03/2026-04159/air-plan-approval-ak-regional-haze-state-implementation-plan-for-the-second-implementation-period)
---
*AI Analytics · CC0 1.0*