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Diesel Truck & CARB Regulations

The Butte County Air Quality Management District does not regulate mobile vehicles and does not have access to fleet compliance information.

Need help finding information about the California Air Resources Board (CARB) On-Road Truck and Off-Road Vehicle Regulations? Telephone the CARB Hotline number: 866-634-3735 (866-6Diesel) or go online to the CARB website  The Truck Stop.