In-Use Off-Road Diesel-Fueled Fleets Regulation

This page last reviewed January 7, 2019
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On July 26, 2007, the California Air Resources Board (CARB) adopted a regulation to reduce diesel particulate matter (PM) and oxides of nitrogen (NOx) emissions from in-use (existing) off-road heavy-duty diesel vehicles in California.  Such vehicles are used in construction, mining, and industrial operations.  The regulatory language and information on reporting and compliance tools can be accessed by clicking the quick links buttons above.  For more information, please contact the DOORS Hotline at (877) 59DOORS (877-593-6677).

Upcoming Trainings:

  • The webinar will cover annual reporting for off-road diesel fleets in DOORS.  We will cover:
    • Reporting changes to your fleet information
    • Reporting annual hour logs
    • Submitting the e-ROAR
    • Submitting the hard copy ROAR

What's New?:

Posted October 18, 2018

Posted January 9, 2018


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