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.
Congress passes laws that authorize EPA and other federal agencies to write rules and regulations that explain the critical details needed to implement environmental laws. Learn about the Clean Water Act and other laws and regulations.
EPA and the Department of the Army have revised the definition of “waters of the United States.” Learn more about the Navigable Waters Protection Rule.
The Army Corps of Engineers issues permits that are needed for any work, including construction and dredging, in the nation’s navigable waters. Learn about the CWA Section 404 permit program.
Wetlands and streams provide important environmental functions including protecting and improving water quality and providing habitat to fish and wildlife. Learn about mitigation projects that offset adverse environmental impacts.
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