House votes 343–79 to reauthorize EPA diesel cleanup grants through 2029

The House passed the Diesel Emissions Reduction Act of 2025 on September 15, 2026, by a vote of 343 to 79, sending the bipartisan measure to the Senate.

The bill, H.R. 2140, extends an existing Environmental Protection Agency program through 2029. Under that program, the EPA provides grants, rebates, and loans to help replace older diesel engines or retrofit them with technology that reduces pollution. The engines covered include those in trucks, buses, and other equipment. The bill itself is a brief, one-section measure that renews the program's authorization, which had been set to lapse.

The legislation was introduced in March 2025 by Rep. Doris Matsui (D-Calif.), along with Reps. Ken Calvert (R-Calif.), Chellie Pingree (D-Maine), and Nick Langworthy (R-N.Y.). During floor debate, Rep. Brett Guthrie (R-Ky.), who managed the bill, said the program helps accelerate replacements and upgrades of older diesel engines and has upgraded some 76,900 vehicle engines. Rep. Matsui said the program has helped replace or retrofit thousands of old diesel trucks, buses, and other engines, and that 58 percent of its projects go toward replacing old diesel school buses. Rep. Lizzie Fletcher (D-Texas) said the Energy and Commerce Committee had reported the bill unanimously earlier this year.

The House took up the bill under a suspension of the rules, a procedure used for measures with broad support that limits debate and bars amendments but requires a two-thirds majority to pass. With House passage, the bill now moves to the Senate for consideration.