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2w ago

Justice Department Sues to Halt California’s Truck Emissions Standards

The suits argue that Congress’s repeal of EPA waivers under the Congressional Review Act has stripped California of authority to enforce its truck emissions rules.

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Overview

  • The DOJ filed two complaints on Aug. 15 challenging CARB’s use of its Clean Truck Partnership to impose heavy- and light-duty vehicle standards and moved to intervene in pending district court cases.
  • The lawsuits contend that June 2025 Congressional Review Act resolutions nullified EPA preemption waivers, making California’s enforcement efforts unlawful under the Clean Air Act.
  • The EPA joined as a co-plaintiff and U.S. Attorney’s Offices in the Northern District of Illinois and Eastern District of California assisted in the filings, and DOJ asked the Ninth Circuit to dismiss related waivers appeals as moot.
  • Major truckmakers such as Daimler and Volvo had already sued to block the state’s emissions rules, and DOJ’s action aligns federal enforcement with industry litigation.
  • The outcome will determine whether California can pursue stricter EV and emissions mandates without federal waiver authority, shaping the balance between state-led climate policies and national regulatory uniformity.