Section 213 of the Clean Air Act (as amended) requires that the Environmental Protection Agency (EPA) complete a study of the contribution of nonroad engines and vehicles to air pollution in areas that fail to meet the National Ambient Air Quality Standards for ozone and/or carbon monoxide. The act also directs the EPA to study emissions of other pollutants that endanger public health or welfare. The report is the final study of emissions from nonroad engines and vehicles. Nonroad engines and vehicles include many different types of internal combustion engines used off the nation's highways. Some examples are: weed wrackers, lawnmowers, airplane tow tractors, all-terrain vehicles, snowmobiles, portable generators, fork-lifts, bulldozers, asphalt compactors, farm tractors, pleasure boats, and oil tankers. In the report, EPA also studied emissions nationwide and in the 24 nonattainment areas. Emissions of Volatile Organic Compounds (VOC), Oxides of Nitrogen (NOx), Carbon Monoxide (CO), and seven other pollutants were calculated. Emissions from nonroad engines and vehicles were compared to those from other sources such as highway vehicles. The report appendixes contain detailed background information.


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