Federal Register Notices related to Transportation, Air Pollution, and Climate Change
May 2026
- May 18, 2026: Revision of Tier 4 Criteria Pollutant Standards, Part 1: Amendments to Phase-In Schedule for Light-Duty and Medium-Duty Vehicles(pdf) (434 KB)
April 2026
- April 1, 2026: Renewable Fuel Standard (RFS) Program: Standards for 2026 and 2027, Partial Waiver of 2025 Cellulosic Biofuel Volume Requirement, and Other Changes (pdf) (4.8 MB)
February 2026
- February 20, 2026: Notice of Request for Information: Development of Guidance for Alternative Fuel Vehicles and Fueling Infrastructure Deployment Under the Clean School Bus Funding Programs (pdf) (227 KB)
- February 18, 2026: Final Rule: Rescission of the Greenhouse Gas Endangerment Finding and Motor Vehicle Greenhouse Gas Emission Standards Under the Clean Air Act (pdf) (1.88 MB)
- February 4, 2026: Notice of Reinstatement of the Gasoline Volatility Waiver for Ohio (pdf) (217 KB)