The U.S. Environmental Protection Agency and the Department of the Army have proposed a new definition of "waters of the United States" that clarifies federal authority under the Clean Water Act. The agencies' proposal is the second step in a two-step process to review and revise the definition of "waters of the United States" consistent with the February 2017 Presidential Executive Order entitled "Restoring the Rule of Law, Federalism, and Economic Growth by Reviewing the 'Waters of the United States' Rule." The agencies will take comment on the proposal for 60 days after publication in the Federal Register. EPA and the Army will also hold an informational webcast on January 10, 2019, and will host a listening session on the proposed rule in Kansas City, KS, on January 23, 2019. More information including a pre-publication version of the Federal Register notice, the supporting analyses and fact sheets are available at: https://www.epa.gov/wotus-rule/step-two-revise and https://www.epa.gov/wotus-rule.