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California Air Resources Board

Where can I get more information?

Fact sheets, compliance tools and regulatory documents about the Truck and Bus Regulation are available at www.arb.ca.gov/dieseltruck. If you have questions or wish to obtain documents in an alternative format or language, please call ARB’s diesel hotline at (866) 6DIESEL (634-3735). TTY/TDD/Speech to Speech users may dial 711 for the California Relay Service.

More Truck Regulation Information

ARB Farmer Program Outreach

Low-Mileage Work Truck Option

Small Fleet Option

General Engine Model Year Compliance Schedules

Updated 8/28/19