Oregon DEQ to update its Advanced Clean Truck Rule and delay start to Heavy-Duty Low NOx Omnibus Rule

Oct. 9, 2024 

The Oregon Department of Environmental Quality is bringing temporary rules to the November  Environmental Quality Commission meeting to adopt California’s expected minor amendments to its Advanced Clean Trucks regulation. Oregon’s Advanced Clean Truck Rule was adopted in 2021 and is one of the 13 states that has opted in to California’s vehicle and truck emission standards.

Changes include adjustments to requirements for truck manufacturers, such as extending the deficit makeup period. Additionally, it makes clear compliance determination and sales reporting rules, which are defined when vehicles are produced and delivered for sale in the state. DEQ is seeking temporary rules to ensure these compliance updates are available for 2025 model year implementation.

Also at the November Commission meeting, DEQ plans to bring temporary rules that will pause the start of the Heavy-Duty Low NOx Omnibus Rule, until 2026. The agency understands there is a continued shortage of new engines that qualify under the stricter oxides of nitrogen emissions standard due to product availability and manufacturer decisions to limit supply of diesel trucks.

Any temporary rules the commission adopts will take effect on Jan. 1, 2025, while DEQ begins a permanent rulemaking process. The agency will host a public forum soon to discuss the expected rule changes.

For more information about Oregon’s Advanced Clean Truck Rule or the Heavy-Duty Low NOx Omnibus Rule, please visit Oregon’s New Rules for Medium- and Heavy-Duty Vehicles and Engines Frequently Asked Questions page and Clean Vehicles web page.

Finally, be sure to sign up through DEQ’s GovDelivery system to receive more information on these changes by email.

For media inquiries only, please contact:

Susan C. Mills, Oregon DEQ public affairs specialist

susan.mills@deq.oregon.gov, 503-956-9648