# Federal Register #2026-20097

EPA extends South Coast PM2.5 attainment deadline

**Posted:** October 01, 2026
**Identifier:** 2026-20097

This EPA Region IX final action extends the attainment deadline for the Los Angeles–South Coast air basin under federal annual PM2.5 standards.
- **Government agency:** U.S. Environmental Protection Agency (EPA), Region IX.
- **Action:** EPA granted California’s request for an extension after determining that the statutory criteria were met.
- **Area covered:** The Serious-area nonattainment area spanning Los Angeles, Orange, Riverside, and San Bernardino counties.
- **Agencies involved:** California Air Resources Board (CARB) and South Coast Air Quality Management District (SCAQMD) are identified as state and local air-quality agencies, not vendors.
- **Procurement relevance:** This is a regulatory action, not a solicitation or contract award. No products, services, OEMs, or commercial vendors are requested or identified.

### Description

The U.S. Environmental Protection Agency is granting California’s request to extend the Serious area attainment date for the South Coast Air Basin nonattainment area under the 2012 annual PM2.5 national ambient air quality standards. The deadline is extended from December 31, 2025, to December 31, 2030. EPA determined that the State satisfied the statutory criteria for the extension. The action is effective November 2, 2026.

[View original listing](https://www.federalregister.gov/documents/2026/10/01/2026-20097/attainment-date-extension-for-the-south-coast-california-2012-annual-pm25-fine-particulate-matter)