Air Resources Board: Know Your Clean-Air Requirements

Failure to heed these requirements could result in significant fines and penalties. Here’s what you need to know to stay in compliance.
Off-Road Diesel Vehicles
Fleets of off-road, self-propelled diesel vehicles 25 horsepower or greater must comply with emissions performance requirements.
- Each year, your off-road fleet must get gradually cleaner, either by replacing or retiring vehicles, or using exhaust retrofits.
- Emissions performance requirements are now mandated for small fleets (less than 2,500 hp).
- Large and medium fleets can legally add only vehicles with Tier 3 or cleaner engines to their fleet. Small fleets can legally add only vehicles with Tier 2 or cleaner engines to their fleet.
- All vehicles need to be labeled and reported; you need to update and confirm your reporting annually.
Large Spark-Ignition Engines
- Large spark-ignition (LSI) engines in equipment such as forklifts are subject to CARB regulation. LSI engines are 25 horsepower or greater, and greater than 1.0 liter displacement.
- Fleets of four or more of this type of equipment must comply with emission performance requirements.
Learn more about your specific requirements and emissions performance dates by visiting The Off-Road Zone website, emailing [email protected] or calling the DOORS hotline at (877) 59-DOORS.
Take a few minutes to make sure your vehicles and equipment not only meet your high standards, but that they also comply with clean air laws.
