Truck and Bus Regulation
- Current regulation and advisories
- School bus page
- Reducing Emissions from Existing Diesel Vehicles fact sheet
- DIESEL Hotline's Most Frequently Asked Questions
- Reporting video -- How to get started
- Where is the GVWR label (gross vehicle weight rating)?
- Where is the ECL label (engine label/emission control label)?
- Fleet calculator (compliance tool)
- Large fleet upload spreadsheet (for reporting)
- Free training
- 3-Day Pass Form
- Compliance requirements fact sheet
- Small fleets compliance options FAQs
- Small fleets compliance options video
- Diesel Hotline's Example Fleets for owners of 1 to 3 trucks or buses
- See more flexibility options, factsheets and FAQs
DPF/soot filters (diesel particulate filter, VDECS, PM filter, exhaust retrofit)
- Filter installation, maintenance and purchase information website
- Only purchase filters on the list of currently verified equipment
- A Truck Driver’s Guide to Care and Maintenance of Diesel Particulate Filters
Reporting certificates and fleet status
- How to verify if hired fleets comply
- Reporting status check -- Verify if a company is listed in the database
- How to print a reporting certificate
(Para ver esta página en español.)
- Applies to
- Does not apply to
- Small fleets
- DPF/soot filter requirements begin January 1, 2012.
- Engine replacement requirements begin January 1, 2015.
- Requirements vary by Gross Vehicle Weight Rating (GVWR) and by the vehicle's engine model year.
- Diesel vehicles with a gross vehicle weight rating greater than 14,000 pounds.
- Privately and federally owned trucks and buses that operate in California.
- Privately and publicly owned school buses that operate in California.
- Includes any person, business, school district, tribal reservation, or federal government agency that owns, operates, leases or rents affected vehicles.
- Gasoline or dedicated natural gas vehicles
- Solid Waste Collection Vehicles
- Public Agency and Utility Vehicles (Not Federal)
- Drayage (Port or Rail) Trucks
- Transit/Urban Buses
- Personal use motor homes or recreational vehicles.
Fleets of three or fewer vehicles can take advantage of the small fleet extension that delay clean-up until January 1, 2014. Reporting requirements started in 2012. There is no fee for reporting. For more information see the links under the "Options" heading below.
For the Basic Compliance Schedule for lighter and heavier trucks see #2 on the Multi-Regulation Summary.
The following are upcoming deadlines:
September 1, 2013
- To avoid penalties for a manufacturer delay, order soot filters by this date to meet January 1, 2014 requirements.
- Deadline to apply for a soot filter extension if no filter is available from any manufacturer.
January 1, 2014
- 2005-06 engine model year diesel vehicles over 26,000 lbs. GVWR must have a soot filter installed, unless reported for an extension.
- Owners using any of the following extensions below are required to meet a percent of total fleet compliance:
- School buses must meet 100%
- Phase-in option must meet 90%
- Log truck provision must meet 10%
- NOx exempt must meet 33%
- Low-mileage construction truck must meet 33%, and
- Small fleet provision - one truck must have a filter or upgrade to a 2007 engine model year or newer (with filter) to meet compliance.
January 31, 2014
Reporting deadline for:
- Eligible small fleets who can delay requirements for the heavier trucks over 26,000 lbs. GVWR within the fleet should be reported by this time to use the small fleet provision and were required to install a filter or upgrade one engine prior to January 1, 2014.
- Annual mileage and hour readings required for fleets using the following delays:
- Low use vehicle exemption
- Low-mileage construction trucks
- Agricultural vehicle provision
- Reporting is required for any changes to the fleet.
- Final vehicle designations for NOx exempt and Log Truck provisions.
Order soot filters early to be ready for the January 1, 2014 deadline.
See the DPF handbook:
A Truck Driver’s Guide to Care and Maintenance of Diesel Particulate Filters.
Question of the Month
This Month's Most Frequent Question! -- I am a small fleet. Is there any extra extension I can use in addition to the Small Fleet Option? -- See the same link for last month's question about how to print a Truck and Bus reporting certificate.
If you need further assistance, please see our quick tips on the Diesel Questions - Need Help? page before contacting us.