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 This website is no longer updated and links to external websites and some internal pages may not work.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

Prepublication Preamble and Rule

Proposes to establish chemical-specific and default global warming potentials (GWPs) for fluorinated greenhouse gases (GHGs) and fluorinated heat transfer fluids (HTFs) that are reported to the Greenhouse Gas Reporting Program (GHGRP) but that do not currently have GWPs under the Program. This would ensure that the atmospheric impacts of all fluorinated GHGs and HTFs are reflected in calculations and reporting under the GHGRP.

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