An official website of the United States government.

Regulations for Emissions from Vehicles and Engines

Final Rule for Control of Emissions From Nonroad Spark-Ignition Engines and Equipment

On this page:

Rule Summary

The Environmental Protection Agency (EPA) is establishing new requirements to reduce emissions of hydrocarbon (HC) and oxides of nitrogen (NOx) from nonroad small spark-ignition engines below 19kW (“Small SI engines”) and marine spark-ignition engines (“Marine SI engines”). This rule includes exhaust and evaporative emission standards for these engines as well as related gasoline fuel tanks and fuel lines. This final rule also includes a wide range of amendments to other highway and nonroad programs.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

Rule History

Additional Resources

Fact Sheet

Regulations for Emissions from Vehicles and Engines Home