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Oregon Department of Environmental Quality

Air Quality


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Living Diesel video - Click to play

Diesel exhaust poses a serious health risk to Oregonians, particularly in urban areas and close to highways and major roads. Diesel exhaust has also been identified as a significant greenhouse gas contributing to climate change.

Learn more about the health effects of diesel exhaust.

  • Living Diesel video
    Informative and entertaining documentary on diesel, causes and solutions; filmed in Portland, Oregon by Savannah Teller-Brown. About 18 minutes

At the request of the Oregon Legislature, DEQ formed a study group and provided recommendations in 2012 on how Oregon can reduce greenhouse gasses by promoting fuel efficiency and reducing idling for commercial vehicles.

Sources of Diesel Exhaust

In Oregon, on-road heavy duty diesel trucks and diesel construction equipment is the largest source of diesel exhaust. Diesel engines are used extensively throughout Oregon and the United States because of their well-founded reputation for reliability, durability, power and fuel efficiency.

Learn more about the sources of diesel exhaust.

Oregon Clean Diesel Initiative

To address the concerns of diesel pollution, DEQ formed the Oregon Clean Diesel Initiative, a multifaceted, non-regulatory approach focused on accelerating the benefits of a clean diesel strategy, including financial assistance in the form of federal grants. The program provides incentives and assistance to diesel fleet owners and
operators seeking to reduce diesel emissions.

EPA is currently soliciting project proposals for funding with a submission deadline of June 17, 2014. For more information, go to our Grants page.

See the left navigation bar at the top of this page for more Clean Diesel program links.

Learn about other efforts to reduce diesel exhaust.

Contact information:

  • Oregon Clean Diesel Initiative (includes technical assistance). Contact Kevin Downing at 503-229-6549
[print version]

For more information about Air Quality call 503-229-5696

For reporting pollution problems contact Complaints

For technical assistance contact DEQINFO


Oregon Department of Environmental Quality
Headquarters: 700 NE Multnomah Street, Suite 600, Portland, OR 97232
Phone: 503-229-5696 or toll free in Oregon 1-800-452-4011
Oregon Telecommunications Relay Service: 1-800-735-2900  FAX: 503-229-6124

The Oregon Department of Environmental Quality is a regulatory agency authorized to protect Oregon's environment by
the State of Oregon and the Environmental Protection Agency.

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