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California Air Resources Board

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green trees line both banks of the sacramento river. the yellow tower bridge crosses the blue water leading to the tall buildings of the sacrament skyline. the scene is set against a clear blue sky.

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6 results found for
Legal Document
Past HD OBD Regulatory Documents
Legal Document
Past OBD II Regulatory Documents
Fact Sheet
On-Board Diagnostic II (OBD II) Systems Fact Sheet
Legal Document
Heavy-Duty OBD Regulations and Rulemaking
Legal Document
OBD II Regulations and Rulemaking
Fact Sheet
Advanced Clean Trucks Fact Sheet

Featured

Semi trucks
the TruckStop

Diesel truck information

Electric car charging
DriveClean

Buying guide for clean and efficient vehicles

Smoke stacks
Breathe Well

Air quality in your neighborhood

Contact Us

(800) 242-4450  |  helpline@arb.ca.gov 
1001 I Street, Sacramento, CA 95814
P.O. Box 2815, Sacramento, CA 95812

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California Governor
Gavin Newsom Opens a New Window.
Secretary for Environmental Protection
Jared Blumenfeld Opens a New Window.
Chair, California Air Resources Board
Liane M. Randolph Opens a New Window.

The California Air Resources Board is one of six boards, departments, and offices under the California Environmental Protection Agency.

  • CalEPA
  • CalRecycle
  • DPR
  • DTSC
  • OEHHA
  • SWRCB

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