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The California Air Resources Board (CARB) adopted the TRU ATCM in 2004 (and amended it
in 2010 and 2011) to reduce diesel PM emissions and resulting health risk from
diesel-powered TRUs. Despite the progress made, additional TRU emission reductions are
needed to further protect communities from near-source pollution impacts, help meet the
current health-based ambient air quality standards across California, and support the State’s
climate goals. On February 24, 2022, CARB approved amendments to the TRU ATCM
(2022 Amendments) to achieve additional emission and health risk reductions from
diesel-powered TRUs and increase the use of zero‑emission technology in the off-road
sector. The 2022 Amendments will help meet the State’s multiple risk reduction, air quality,
and climate goals, as well as the directive of Executive Order N-29-20, which set a goal for
100 percent zero-emission off-road vehicles and equipment in the State by 2035.
Below is a summary of the 2022 Amendments. Note that there are multiple compliance
deadlines, the earliest starting December 31, 2022.
For regulation and ammendment FAQ, please view the TRU ATCM FAQ sheet.
PROGRAM HOMEPAGE ►
New amendments to the TRU ATCM became effective October 1, 2022.
Below is a summary of the 2022 Amendments. Note that there are multiple compliance
deadlines, the earliest starting December 31, 2022.
July 31, 2009 | Reporting of California-based TRUs to CARB |
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January 1, 2013 | Driver, freight broker, freight forwarder, motor carrier, shipper, and receiver requirement to check TRU compliance |
Required seven years after the engine MY | Ultra-low emission TRU in-use performance standard (model year 2014 and older truck TRUs) |
Required seven years after the engine MY | Ultra-low emission TRU in-use performance standard (model year 2022 and older trailer TRUs, domestic shipping container TRUs, railcar TRUs, and TRU generator sets) |
December 31, 2022 (NEW) | Lower global warming potential refrigerant (model year 2023 and newer truck TRUs, trailer TRUs, and domestic shipping container TRUs) |
December 31, 2022 (NEW) | PM emission standard (model year 2023 and newer trailer TRUs, domestic shipping container TRUs, railcar TRUs, and TRU generator sets) |
December 31, 2023 (NEW) | Vehicle owner requirement to check TRU compliance |
December 31, 2023 (NEW) | Applicable facility registration, fees, and TRU compliance |
December 31, 2023 (NEW) | Reporting out-of-state-based TRUs to CARB |
December 31, 2023 (NEW) | TRU operating fees and compliance labels |
December 31, 2023 (NEW) | Zero-emission truck TRU fleet requirement (15 percent/year) |
TRU owners or operators may apply for compliance extensions based on the unavailability of compliance technology, as well as zero-emission infrastructure, manufacturer, installer, or financing delays. An exemption is available for mobile catering companies that provide mobile catering services for emergency incidents. More information and application forms for extensions and exemptions are available on the TRU Forms webpage.
Owners may report their TRU(s) to CARB by applying for a CARB identification number (IDN) through the CARB online system at the ARBER Registration Help Page ►.
Applications are also available on the TRU Forms webpage and may be submitted by email to
arber@arb.ca.gov, or by mail to:
California Air Resources Board
Transportation and Toxics Division (TRU)
P.O. Box 2815
Sacramento, CA 95812
The public may use the following links to search CARB’s Equipment Registration (ARBER) system to check the compliance status of TRUs and TRU generator sets and provide comments or provide tips on violations about specific TRUs. CARB will monitor these comments/tips and follow up with enforcement action, if warranted.
You can also report noncompliant TRUs to CARB's Complaint Program.
TRU Compliance Search Page ►
100% TRU/ATCM Compliant Carrier Search Page ►