Adopted rule

Administrative Order No. DEQ-11-2021
Filed and effective: July 23, 2021 
See Oregon Bulletin, August 2021


In 2019, the Oregon Legislature passed House Bill 2007. The legislation authorizes the Environmental Quality Commission of the Oregon Department of Environmental Quality to adopt rules for certification of approved retrofit technologies of a diesel engine that powers a medium-duty truck or a heavy-duty truck.

The legislation includes prohibitions on registering and titling older diesel engines in Clackamas, Multnomah and Washington counties after certain deadlines unless they are equipped with retrofit technologies established by the commission or DEQ. 

​DEQ is convening an advisory committee to review the technical issues and fiscal impacts related to the proposed rules. In convening this committee, DEQ has appointed members that reflect the range of entities that are both directly and indirectly affected by proposed changes to the rules.

Previous meetings

Meeting 3 - Jan. 26, 2021, 

Meeting 1 - Sept. 18, 2020

Meeting 2 - Nov. 6, 2020

Advisory committee meetings are open to the public. The public may attend the meeting, but the committee has discretion whether to allow the public to participate in the meeting. The public will be able to comment on the proposed rule changes during the public notice and comment period later in the rulemaking. DEQ publishes meeting notices on the DEQ Events Calendar.

Please notify DEQ of any special physical or language accommodations or if you need information in large print, Braille or another format. To make these arrangements, contact DEQ, Portland, at 503-229-5696 or call toll-free in Oregon at 1-800-452-4011, ext. 5696; fax to 503-229-6762; or email us at: Hearing impaired persons may call 711.

Public involvement

The public comment period for this rulemaking closed  at 4 p.m. on May 18, 2021. The next step in the rule adoption process is for the Environmental Quality Commission to consider adopting the proposed rule changes at a future meeting.

​For more information, see the Notice of Proposed Rulemaking and Draft Rules, which includes the notice, proposed rules and supporting documents.

Public hearing

A public hearing was held April 26, 2021.


EQC action

The Environmental Quality Commission adopted these rules at its meeting on July 23, 2021.

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