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California Air Resources Board

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HD I/M Fact Sheets

  • Heavy-Duty Inspection and Maintenance Program
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Contact

Heavy-Duty Inspection and Maintenance Program
Email
hdim@arb.ca.gov
  • HD I/M Regulation: Vehicle Owner Basics | Español | ਪੰਜਾਬੀ
  • HD I/M Program Background and Regulation Basics | Español | ਪੰਜਾਬੀ
  • Periodic HD I/M Testing Requirements | Español | ਪੰਜਾਬੀ
  • HD I/M Tester Training and Examination | Español | ਪੰਜਾਬੀ
  • On-Board Diagnostics (OBD) Testing Devices | Español | ਪੰਜਾਬੀ

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

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