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 This website is no longer updated and links to external websites and some internal pages may not work.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

Technical Documents: NESHAP for Reciprocating Internal Combustion Engines

The following technical documents addressing economic impacts of the NESHAP for Reciprocating Internal Combustion Engines as well as comments received from the public regarding this regulation and its amendments.