CARB’s own study shows that DPF filters do remove particulate matter, but during regeneration the soot is expended. This study shows that after regeneration, the particles emitted are even finer and is even more capable of being absorbed into your circulatory system and can be absorbed through the skin. The Truck and Bus Regulation is creating even worse pollution than it is reducing.

 

Read the full report below: 

Measurement of Emissions from both Active and Parked Regenerations of a Diesel Particulate Filter from Heavy Duty Trucks