Dealer & fleet information

Regulatory guidance and rulemaking
Ecology is temporarily pausing portions of Advanced Clean Cars II, Advanced Clean Trucks, and Heavy-Duty Low NOx Omnibus implementation in response to recent federal actions. Read more here.
During this pause Ecology will continue our current rulemaking for amendments to Advanced Clean Trucks and Heavy-Duty Low NOx Omnibus.
Washington’s low- and zero-emission vehicle standards don't require dealers or fleet owners to purchase certain types of vehicles from manufacturers. However, they will gradually shift the types of new vehicles available for sale in our state.
Standards for light-duty vehicles are already in place and being followed by manufacturers. Standards taking effect in 2026 are for only medium-heavy-duty low-emission vehicles.
Fleet reporting
Large fleet operators were required to disclose information about the medium- and heavy-duty vehicles they use at the end of 2023.
We’re now analyzing the data, and we’ll publish a report with our findings. This information will help the state design programs that assist fleet owners and operators with electrification and transitioning to less-polluting technologies.
Sign up for our emails to stay up to date on fleet reporting requirements.
Frequently asked questions
How the standards work
Planning for ZEVs
Vehicles & charging
Related links
Contact information
Dustin Watson
Mobile Source Air Quality Specialist
CleanVehicles@ecy.wa.gov