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 This website is no longer updated and links to external websites and some internal pages may not work.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

Greenhouse Gas Reporting Program (GHGRP)

GHGRP General Fact Sheet

Fact Sheet: Mandatory Reporting of Greenhouse Gases (40 CFR part 98): August 2010

Provides an overview of the Mandatory Reporting of Greenhouse Gases rule, which was published in October 2009 and went into effect in January 2010.

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