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 This website is no longer updated and links to external websites and some internal pages may not work.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

Documents Related to the Emissions and Health Effects from E15 Fuel Testing

The following documents are related to the emissions and health effects testing of E15 fuel (a fuel blend of 15% ethanol and 85% gasoline). 

The Clean Air Act and EPA regulations require that manufacturers of gasoline and diesel fuels and fuel additives produced and commercially distributed for use in highway motor vehicles must register their gasoline and diesel fuels and fuel additives with EPA. In addition to providing basic information such as product and manufacturer identification, manufacturers are required to analyze the emissions generated by the fuel and fuel additive products, survey existing scientific information for each product, and where adequate information is not available, conduct specified tests to screen for the potential adverse health effects of these emissions. The primary purpose of the registration program is to provide information for identifying and evaluating the potential adverse effects of fuels and fuel additives emissions to help inform any future regulatory decision-making.

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