EPA proposes rollback of heavy duty diesel truck emissions regulation

July 9 (UPI) -- The Trump administration on Thursday proposed to roll back a Biden-era rule on emissions from heavy duty diesel trucks because it is "unworkable."

The Environmental Protection Agency proposed lowering requirements for heavy truck emissions systems because of issues with the technology for new trucks and penalties for older vehicles that do not measure up, the agency said in a press release.

The change is expected by the administration to save up to $6,000 per new truck and could help save truckers roughly $12 billion, Fox News and The Hill reported.

The change will shorten government requirements for engine warranties to 100,000 miles, from 450,000 miles, and will delay a requirement that trucks meet emissions standards for their first 650,000 miles -- an increase from the first 435,000 miles -- for three years.

"This proposal to eliminate engine deratements and reform the Biden-era ... requirements will lower costs, increase safety and keep our nation's food supply moving," Secretary of Agriculture Brooke Rollins said in the release.

The Biden administration rule was aimed at strengthening rules about nitrogen oxide emissions by improving maintenance and repair requirements over a longer period of time.

Critics have said that the new rule will weaken clean air protections and potentially affect Americans' health, but the administration has countered that lowering business and consumer costs are an essential focus and that environmental concerns are overblown.

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This story was originally published July 9, 2026 at 2:00 PM.