An official website of the United States government.

We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Underground Injection Control (UIC)

Class I Underground Injection Control Program: Study of the Risks Associated with Class I Underground Injection Wells

EPA’s "Study of the Risks Associated with Class I Underground Injection Wells" describes the:

  • Current Class I UIC program
  • History of Class I injection
  • Studies of human health risks associated with Class I injection wells, which were conducted for past regulatory efforts and policy documentation
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.