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The City of Portland, Oregon

Office of Management & Finance

Bureau of Revenue and Financial Services

Phone: 503-823-5288

Fax: 503-823-5384

1120 SW 5th Avenue, Rm 1040, Portland, OR 97204

Clean Air Construction Technical Assistance

Have questions about what emission control retrofit options are available for your diesel equipment/vehicle?  What about how to maintain those devices once you have them installed?  Need help just navigating the Clean Air Construction requirements?  Check out the resources on this page for answers.  We will be adding more information/resources over time. 


On-Site Technical Assistance for State Certified DMWESBs/SDVBs

Hands-on Clean Air Construction technical assistance for COBID firms doing business with the City of Portland

Diesel Emissions Explained - from the Diesel Perforemance Podcast

Overview of diesel emission systems in an on-road vehicle. Note that this link is provided as information only and does not represent an endorsement of the podcast or its sponsors or advertisers by the City or partner agencies.

Diesel Retrofit and Repower Firms

List of DEQ recognized clean diesel service providers

What diesel emission retrofit options exist?

Information from MECA on available diesel emission retrofit technologies