CARB Certification

The California Air Resource Board (CARB) plays a crucial role in improving engine emissions and ensuring that vehicles operating within the state of California adhere to stringent environmental standards.

Meeting California's Environmental Standards

CARB works to reduce:

  • Smog-forming emissions
  • Air toxins
  • Particulate matter
  • Climate changing gases

This Board regulates heavy-duty trucks involved in the transportation of goods to or from California's ports and rail yards, as well as refrigerated trucks operating anywhere within the state. It is imperative that these vehicles are compliant with emissions standards.

As California moves towards improving emissions throughout the state, a CARB certification is increasingly in demand. Brokers and freight forwarders are only permitted to assign California routes to CARB-compliant carriers. We can help you navigate California environmental regulations so that you can reach or maintain compliance.

CARB Certificate Example

Pictured - an example of the certificate awarded to compliant companies.

Clean Truck Check

The California Air Resource Board (CARB) implemented the Clean Truck Check (Heavy Duty Inspection and Maintenance - HD I/M) program in January 2023. This initiative requires heavy-duty vehicles over 14,000 pounds to undergo regular emissions inspections.

Roadside emissions monitoring devices (REMD) identify potential high emitters. Flagged vehicles receive a Notice to Submit to Testing (NST) from CARB, and require a passing emissions compliance test by a credentialed tester within 30 days. Non-compliant vehicles may face further testing and penalties.

Starting January 1, 2025, non-exempt vehicles must pass emissions inspections twice a year, which can be submitted up to 90 days before the deadline.

Smog Testing Requirements:

  • Engine model years 2013 and later (OBD-equipped): OBD testing twice a year, increasing to four times per year after three years. California-registered motorhomes and on-road agricultural vehicles require annual testing.
  • Engine model years prior to 2013 (non-OBD-equipped): Visual and functional inspection twice a year. Diesel vehicles also need a smoke opacity test twice a year. California motorhomes and on-road agricultural vehicles require annual testing.

You can find more information on passing a Clean Truck Check or how to comply with environmental regulations by contacting our experts here.