Diesel Emissions Reduction Act of 2025

S. 2235 would extend the diesel emissions reduction program, which was set to expire in 2024, through 2029. The bill amends the Energy Policy Act of 2005 to continue federal support for efforts to reduce harmful emissions from diesel engines. If enacted, the legislation would authorize $100 million annually from 2026 through 2029 for the Environmental Protection Agency to provide grants and rebates to state, local, and tribal governments for programs that reduce diesel emissions. These funds support initiatives like retrofitting older diesel engines, replacing aging vehicles, and other projects aimed at improving air quality and public health. The bill has passed committee review and is now eligible for a floor vote in the Senate.