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 This website is no longer updated and links to external websites and some internal pages may not work.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

Petition for En Banc Rehearing of CSAPR

The United States filed a petition seeking en banc rehearing of the U.S. Court of Appeals for the D.C. Circuit's August 21, 2012 decision regarding EPA's Cross-State Air Pollution 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.