emissions News Updates

The agency is expected to leave in place a requirement that NOx emissions for heavy-duty trucks fall to 35 milligrams per horsepower-hour from 200 mg/hp-hr.

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Tighter emissions standards for heavy-duty engines produced starting in 2027 will make leasing more attractive, said Dean Vicha, president of NationaLease.

Democratic Gov. Gavin Newsom’s office blasted the lawsuit, noting it comes as gas prices climb amid the Iran war and as some drivers consider going electric.

American Trucking Associations is asking EPA to re-evaluate and make adjustments to its forthcoming nitrogen oxide emissions rules for 2027 model-year heavy-duty trucks.

A White House official, speaking on condition of anonymity because they were not authorized to speak publicly, confirmed the plans, which were first reported by The Wall Street Journal.

Under the new proposal, tailpipe emissions will have to be reduced by 90% by the middle of the next decade compared with the current goal of a 100% reduction.

“We are encouraged by several proposed adjustments that should help lower costs and ease implementation,” ATA Vice President of Energy and Environmental Affairs Patrick Kelly said.

ATA President Chris Spear emphasized the federation's active role in this year’s regulatory changes, including in a meeting with then-presidential candidate Donald Trump last summer.

“Paccar delivered good revenues and net income in the third quarter of 2025. Peterbilt, Kenworth and DAF’s excellent trucks contributed to the good results,” said CEO Preston Feight.