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 This website is no longer updated and links to external websites and some internal pages may not work.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

Incremental Documentation for EPA Platform v6 used for the Proposed ACE Rule

For the power sector analysis of the proposed ACE Rule, the EPA used an earlier version of the model that is slightly different than the version documented on EPA’s Power Sector Modeling Platform v6 using IPM website. This document catalogues the assumptions that differ from those published in the complete EPA Platform v6 documentation, and is applicable to modeling scenarios supporting the proposed ACE rule. Further discussion of these scenarios is available in the RIA for the proposed rule.

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