EPA, Army Propose New WOTUS Definition

Agency says new rule seeks to clarify where the Clean Water Act applies and seeks to replace the 2015 “waters of the United States” definition.

December 12, 2018

WASHINGTON – On December 11, the U.S. Environmental Protection Agency (EPA) and the Department of the Army (Army) proposed a definition of “waters of the United States” that clarifies federal authority under the Clean Water Act.

“Our proposal would replace the Obama EPA’s 2015 definition with one that respects the limits of the Clean Water Act and provides states and landowners the certainty they need to manage their natural resources and grow local economies,” said EPA Acting Administrator Andrew Wheeler. “For the first time, we are clearly defining the difference between federally protected waterways and state protected waterways.”

The proposal is the second step in a two-step process to review and revise the definition of “waters of the United States” per President Trump's February 2017 Executive Order, “Restoring the Rule of Law, Federalism, and Economic Growth by Reviewing the ‘Waters of the United States’ Rule.” The Executive Order states that it is in the national interest to ensure that the nation's navigable waters are kept free from pollution, while at the same time promoting economic growth, minimizing regulatory uncertainty, and showing due regard for the roles of Congress and the states under the Constitution.

EPA notes that the agencies’ proposed rule would provide clarity, predictability and consistency so that the regulated community can easily understand where the Clean Water Act applies, and where it does not. Traditional navigable waters, tributaries to those waters, certain ditches, certain lakes and ponds, impoundments of jurisdictional waters, and wetlands adjacent to jurisdictional waters would be federally regulated. It also details what are not “waters of the United States,” such as features that only contain water during or in response to rainfall (e.g., ephemeral features); groundwater; many ditches, including most roadside or farm ditches; prior converted cropland; storm water control features; and waste treatment systems.

The agencies believe this proposed definition appropriately identifies waters that should be subject to regulation under the Clean Water Act while respecting the role of states and tribes in managing their own land and water resources. States and many tribes have existing regulations that apply to waters within their borders, whether they are considered “waters of the United States.” The agencies’ proposal gives states and tribes more flexibility in determining how best to manage their land and water resources while protecting the nation’s navigable waters as intended by Congress when it enacted the Clean Water Act. 

The agencies will take comments 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 www.epa.gov/wotus-rule

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