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 This website is no longer updated and links to external websites and some internal pages may not work.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

Underground Injection Control (UIC)

EPA Region 5 Guidance for Deep Injection Wells

The EPA Region 5 UIC Branch has prepared guidance documents to help injection well owners and operators comply with the UIC regulations and conditions of their permits. EPA headquarters UIC program has also made information useful to operators available.  See National UIC Documents below.

See also UIC in EPA Region 5 (IL, IN, MI, MN, OH, and WI)

National UIC Documents

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