# Air Plan Approval; California; South Coast Air Quality Management District
> **Rule** · Final rule. · Published 2025-12-11 · Effective 2026-01-12 · 90 FR 57364
## Document
- **Document number:** 2025-22584
- **Category:** air-emissions
- **Federal Register citation:** 90 FR 57364
- **CFR reference:** 40 CFR 52
- **Publication date:** 2025-12-11
- **Effective date:** 2026-01-12
- **State:** CA
- **EPA docket:** EPA-R09-OAR-2025-0199
## Abstract

The Environmental Protection Agency (EPA) is taking final action to approve a revision to the South Coast Air Quality Management District (SCAQMD) portion of the California State Implementation Plan (SIP) concerning a rule submitted to address section 185 of the Clean Air Act (CAA or "Act") with respect to the 1997 and 2008 8-hour ozone National Ambient Air Quality Standards (NAAQS or "standard").

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/12/11/2025-22584/air-plan-approval-california-south-coast-air-quality-management-district)
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