Stop CARB Act of 2025

HR 2218 (Stop CARB Act of 2025) would block California from enforcing its own emissions standards for construction equipment, farm machinery, and locomotives by repealing federal provisions that allow states to set stricter rules. It specifically repeals Section 177 of the Clean Air Act, which authorizes California’s vehicle standards, and invalidates all existing waivers permitting California’s regulations (including those for nonroad engines) upon enactment. The bill also denies any pending waiver applications and removes references to California’s standards from other Clean Air Act sections. This directly affects California’s regulatory authority over emissions for these specific equipment types and vehicle categories.