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Air Quality

Model Ordinances & Sustainable Development Resource Tools

Mobile Sources

Mobile Sources include on-road vehicles (such as cars, trucks and buses) and nonroad equipment (such as boats, airplanes, lawn mowers, leaf blowers, and other agricultural and construction equipment). Bus and car lines around schools, gas-operated equipment used to maintain your yard, and gasoline and oil spills on the roads can all contribute significant pollution to the air.

Running vehicles and equipment generate air pollution when they are idling. In fact, any more than 10 seconds of idling uses more fuel than is required to restart the engine for most vehicles.

Mobile Source emissions contain carbon monoxide (CO), particulate matter (PM), nitrogen dioxide (NO2), and Volatile Organic Compounds (VOC), which are also known as Hydrocarbons. They also greatly contribute to the formation of ground-level ozone.

According to the U.S. Environmental Protection Agency, there are more than 200 million vehicles driving on U.S. highways, and they contribute 77 percent of total carbon monoxide (CO) and 45 percent of nitrogen oxides (NOX) in our air.

All documents linked below are in pdf format.


For more information please contact the Bureau of Air Quality at (803) 898-4123 or by email.