Diesel engines carry millions of children to school each day, power the movement of goods, help produce the food that we eat, help construct the buildings in which we live and work, and help build the roads on which we travel. While diesel engines provide mobility and are critical to the nation's economy, exhaust from diesel engines contains pollutants that negatively impact human health and the environment.

Diesel engines are a major source of pollution. Specifically, they emit particulate matter (PM); nitrogen oxides (NOx)—which contribute to the production of PM2.5, ground-level ozone, or smog; hydrocarbons (HC); and, air toxics. These pollutants contribute to poor air quality in Utah and can cause serious health problems, especially for children, the elderly, and the chronically ill.

Fortunately, many cost-effective solutions are available today that can dramatically reduce pollutants from diesel exhaust. The Utah Division of Air Quality established the Utah Clean Diesel Program to promote diesel emission reduction strategies.

What's Happening


Millions of dollars have been awarded, thousands of tons from diesel emissions and over a million gallons of diesel fuel have been reduced through the Utah Clean Diesel Program. Read more about our accomplishments.


Lisa Burr—Mobile Sources and Transportation Section
Phone: 801-536-4019