Non-road emissions refers to pollutants emitted by non-road engines and non-road vehicles, e.g., farm and construction equipment, gasoline-powered lawn and garden equipment, and power boats and outboard motors.

In the United States, Section 213 of the Clean Air Act

Clean Air Act

A Clean Air Act is one of a number of pieces of legislation relating to the reduction of airborne contaminants, smog and air pollution in general. The use by governments to enforce clean air standards has contributed to an improvement in human health and longer life spans...

 (42 U.S.C. 7547), provides that the Environmental Protection Agency‎ (EPA) can issue regulations to limit emissions from these sources.