State officials warn EPA rollbacks stymie air quality efforts

By Alex Guillén | 06/03/2026 01:10 PM EDT

The lost emissions reductions from EPA’s repealed and delayed vehicle rules “are going to have a significant impact on our ability to attain the [national ozone standard],” said a Connecticut official.

Traffic enters lower Manhattan after crossing the Brooklyn Bridge, Feb. 8, 2024, in New York.

States have little control over mobile emissions, meaning EPA rollbacks will make it much harder for some states to meet federal air quality standards, officials said Wednesday. Bebeto Matthews/AP

States from the mid-Atlantic to New England will have much more difficulty meeting the national ozone standard because of the Trump administration’s rollbacks of vehicle emissions rules, officials warned Wednesday.

Speaking at a meeting of the Ozone Transport Commission, a coalition of states stretching from Virginia to Maine, several state officials noted that states have limited ability to curb smog-forming pollution from mobile sources compared to EPA.

That’s especially true now that the Trump administration has revoked waivers issued to California approving more stringent standards. Because many of the OTC states adopted California’s rules, undoing them affected around 40 percent of new vehicle sales.

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“The significance of that can’t be understated,” said Paul Farrell, director of the Planning and Standards Division at the Connecticut Department of Energy and Environmental Protection, at the meeting in New Haven.

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