Federal Register Notices related to Transportation, Air Pollution, and Climate Change
July 2026
- July 14, 2026: Amendments and Nonconformance Penalties for Model Year 2027 and Later Heavy-Duty Highway Engines and Amendments to Inducement Provisions for SCR-Equipped Diesel Engines (pdf) (3.7 MB)
June 2026
- June 29, 2026: Agency Information Collection Activities; Proposed Information Collection Request; Comment Request; Renewable Fuel Standard (RFS) Program: Standards for 2023–2025 and Other Changes (Renewal) (pdf) (207 KB)
- June 22, 2026: Agency Information Collection Activities; Proposed Information Collection Request; Comment Request; Clean School Bus (CSB) Rebate Program; EPA ICR No. 2461.07, OMB Control No. 2060–0686 (Renewal) (pdf) (198 KB)
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)