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.

Waters of the United States (WOTUS) Rulemaking

Proposed Revised Definition of WOTUS - Factsheets

On December 11, 2018, the EPA and Department of the Army signed a proposed rule revising the definition of "waters of the United States" to clarify federal authority under the Clean Water Act in a clear and understandable way. The proposed definition would replace the approach in the 2015 Rule and the pre-2015 regulations. The agencies are providing four fact sheets on the proposed revised definition of "waters of the United States."

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