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 This website is no longer updated and links to external websites and some internal pages may not work.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

Adopt-A-MACT Project: A Manual of Model Documents and Guidance to Aid Compliance and Enforcement of the Nutritional Yeast MACT (Maximum Achievable Control Technology)

This manual provides a compliance checklist, and overview of emissions limitations, how to do performance tests, and an overview of applicability of general provisions. This manual will provide assistance with complying with the National Emissions Standards for Hazardous Air Pollutants (NESHAP) for Nutritional Yeast.

For more information on the rule, visit the regulation page for Manufacturing of Nutritional Yeast: National Emission Standards for Hazardous Air Pollutants (NESHAP).

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