Diesel Programs

Fine particle pollution, commonly called soot, causes many serious health problems. Fine particle pollution is also one of the few pollutants that you can actually see.

Diesel engines emit a complex mixtures of air pollutants, composed of both solid and gaseous material. The visible emissions you can see in diesel exhaust are known as particulate matter. These include many carbon particles (also called soot), as well as gases that become visible as they cool. Diesel particulate matter (diesel PM) has been identified as having the potential to cause cancer, as well as many other adverse health effects. In addition to particulate matter, emissions from diesel-fueled engines include over 40 other cancer-causing substances.

Equipment Modernization Program

The Equipment Modernization Program provides funding for retrofits and modernization of off-road construction equipment.

Diesel Funding Successes

See breakdowns of funding sources, overall projects that have been funded, and select highlighted completed projects.


Our NJ ports are a hub of commerce and require diesel power to operate. Learn about the public and private efforts underway to reduce emissions at the ports.

Mandatory Retrofit Program

The Diesel Retrofit Law was passed in 2005 to clean up emissions from certain diesel-powered vehicles and equipment. Learn about the accomplishments.

Advanced Clean Trucks Reporting

Report your medium- and heavy-duty fleet vehicles with a gross vehicle weight rating greater than 8,500 lbs.