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 This website is no longer updated and links to external websites and some internal pages may not work.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

Clean Air Markets

Plain English Guide to the Part 75 Rule

EPA has developed this plain-English guide as a “road map” to help interested parties navigate through the complex Part 75 continuous emission monitoring rule. This guide may be useful to people responsible for complying with the rule, regulatory agencies assessing compliance with the rule, and others who want a general understanding of the emissions monitoring approach used in EPA’s emissions trading programs. For more information about 40 CFR Part 75 and continuous emissions monitoring refer to the Emissions Monitoring and Reporting page.

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