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 This website is no longer updated and links to external websites and some internal pages may not work.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

Green Power Partnership

Guide to Purchasing Green Power

The Guide to Purchasing Green Power is an excellent place to start for organizations interested in buying green power. The guide provides information about the green power procurement process, different green power supply options, benefits of green power purchasing, as well as information on how to capture the greatest benefit from your purchase. First published in 2004, and previously revised in 2010, this latest version of the Guide provides an overview of green power markets and describes the necessary steps to procure green power. The Guide is the product of a cooperative effort between EPA, the U.S. Department of Energy, World Resources Institute, and Center for Resource Solutions, and the National Renewable Energy Laboratory.

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