On October 22, 2019, the Environmental Protection Agency and Department of the Army finalized a rule to repeal the 2015 Clean Water Rule and re-codify the regulatory text defining "waters of the United States" (WOTUS) that existed prior to the 2015 Rule. The final repeal rule became effective on December 23, 2019. The 2019 Rule was replaced by the Navigable Waters Protection Rule. Read the final Navigable Waters Protection Rule.

The following documents are associated with the 2015 Clean Water Rule.

• Technical Support Document for the Clean Water Rule: Definition of Waters of the United States (PDF)(423 pp, 2 MB)
• Final Clean Water Rule Economic Analysis (PDF)(87 pp, 833 K)
• Environmental Assessment - Finding of No Significant Impact (PDF)(104 pp, 734 K)