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 This website is no longer updated and links to external websites and some internal pages may not work.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

Mercury and Air Toxics Standards

MATS E-Reporting Final Action

March 9, 2015The EPA issued an interim final rule that will allow owners or operators of electric generating units to submit to EPA, in PDF format, emissions and compliance reports for the Mercury and Air Toxics rule.  This rule clarifies that these reports should include complete (not summary) performance test data.  

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