Transport Refrigeration Unit
Transport Refrigeration Units (TRU) are refrigeration systems powered by diesel internal combustion engines designed to refrigerate or heat perishable products that are transported in various containers, including truck vans, semi-truck trailers, shipping containers, and railcars.
More about this program
2022 Amendments to the TRU ATCM
On February 24, 2022, CARB approved amendments (2022 Amendments) to the Transport Refrigeration Unit Air Toxic Control Measure (TRU ATCM) for In-Use Diesel-Fueled TRUs (Title 13 CCR §§ 2477–2477.24), effective October 1, 2022. The 2022 Amendments require TRU and facility owners or owner/operators to pay operating and registration fees, respectively. On September 17, 2025 Governor Newsom signed Senate Bill (SB) 153 into effect, granting CARB authority to impose fees on entities regulated under the 2022 Amendments to the TRU ATCM.
Information on invoicing, payment instructions, and frequently ask questions will be available in December 2025. Sign up for the TRU Listserv to receive the latest program updates.
