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 This website is no longer updated and links to external websites and some internal pages may not work.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 »

Fuels Registration, Reporting, and Compliance Help

The regulations dictate specific equipment and methodologies for reformulated gasoline analysis. We recommend that the EPA only specify the precision or level of accuracy it requires and let the chemist or laboratory decide which method and type of equipm