An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Regulations for Emissions from Vehicles and Engines

Direct Final Rule for Exhaust Emission Standards for 2012 and Later Model Year Snowmobiles

On this page:

Rule Summary

In a November 2002 final rule, we established the first U.S. emission standards for new snowmobiles. Subsequent litigation regarding that final rule resulted in a court decision which requires us to: remove the oxides of nitrogen (NOX) component from the Phase 3 snowmobile standards set to take effect in 2012, and; clarify the evidence and analysis upon which the Phase 3 carbon monoxide (CO) and hydrocarbon (HC) standards were based. In this action, we are removing the NOX component from the Phase 3 emission standard calculation. We are deferring action on the 2012 CO and HC emission standards portion of the court’s remand to a separate rulemaking action.

Regulations for Emissions from Vehicles and Engines Home