California Energy Journal

California Energy Journal

EVs

EPA Proposes to Prevent California from Applying Smog Regulations to Out-of-State Trucks

Aug 28, 2025
∙ Paid

The U.S. Environmental Protection Agency (EPA) proposed to disapprove of California’s Heavy-Duty (HD) Inspection and Maintenance (I/M) Requirements as it applies to out-of-state and out-of-country vehicles.

The rule, which was implemented in 2023 intended to reduce emissions of particulate matter and oxides of nitrogen, mandates roadside emissions screen…

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