In November 2021, Washington State adopted California’s more protective vehicle emission standards for new vehicles – starting with model year 2025 and later. This rulemaking expands Washington’s vehicle emission standards to include:
- ZEV requirements that apply to passenger cars, light-duty trucks, and medium-duty
vehicles (vehicles with a gross vehicle weight rating between 8,501 and 14,000 pounds
such as trucks, SUVs, and vans). Manufacturers must sell a percentage of ZEV vehicles. - ZEV requirements that apply to vehicles greater than 8,500 pounds gross vehicle weight
rating, in effect adopting California’s Advanced Clean Trucks rule. The rule applies to delivery
vans, work trucks, long-haul trucks, drayage trucks, transit buses, garbage trucks, and
other commercial work vehicles. Manufacturers must sell a certain percentage of ZEV
trucks. - Low emission vehicle requirements that apply to medium-duty vehicles; and updates to
existing requirements to ensure consistency with California’s vehicle emission
standards.