EPA Proposes Blocking California Smog Checks on Out-of-State Trucks

The U.S. Environmental Protection Agency (EPA), under Administrator Lee Zeldin, has proposed to disapprove California's Heavy-Duty Inspection and Maintenance (I/M) program, commonly known as "Clean Truck Checks," for out-of-state and foreign-registered trucks, citing violations of the U.S. Constitution's Commerce Clause and the Clean Air Act. The EPA argues that California oversteps its authority by regulating vehicles not registered within the state, labeling this as an unconstitutional power grab that raises costs for American consumers reliant on freight transportation. California's program, enforced by the California Air Resources Board (CARB), aims to reduce smog-forming pollutants from heavy-duty vehicles, projecting significant emissions reductions and public health benefits when fully implemented. However, the EPA contends that applying these standards to out-of-state and foreign trucks interferes with federal jurisdiction over interstate commerce and foreign affairs. This move is part of a broader Trump administration effort to roll back California's stringent emission regulations and unify national standards, which has led to ongoing legal and regulatory conflicts. Public comments on the EPA proposal are open for 30 days, as tensions continue between federal agencies and California over climate and environmental policies.