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 This website is no longer updated and links to external websites and some internal pages may not work.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

Significant New Alternatives Policy (SNAP)

Timeline of Actions on HFCs

The Kigali amendment to phase down HFCs was the result of years of negotiation by parties to the Montreal Protocol, with numerous HFC amendment proposals Exit submitted by North America (United States, Canada, and Mexico), Island States (the Federated States of Micronesia and Mauritius), India, and the European Union (28 Member States).

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