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Navigable Waters Protection Rule

Final Rule: Definition of “Waters of the United States” – Addition of Applicability Date to 2015 Clean Water Rule

On January 31, 2018, the Environmental Protection Agency and U.S. Department of the Army (the agencies) finalized a rule adding an applicability date to the 2015 Rule defining “waters of the United States.” The final rule was published in the Federal Register on February 6 , 2018. Since then, the U.S. District Courts for the District of South Carolina and the Southern District of Washington enjoined and vacated the 2018 Rule. Please visit “Definition of ‘Waters of the United States’: Rule Status and Litigation Update” for updates regarding the status of this final rule.

This rule is available on the Government Publishing Office's govinfo website and on in Docket No. EPA-HQ-OW-2017-0644.

The agencies also prepared a memorandum for the record to provide the public with information about the potential economic impacts associated with this actionThis memorandum, "Consideration of Potential Economic Impacts for the Final Rule: Definition of 'Waters of the United States' – Addition of Applicability Date to 2015 Clean Water Rule," is also available in the docket.

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