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US Army Corps of Engineers

Chicago District Website

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Chicago District Regulatory Public Notices

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Further Information

LRC-2023-3-WOTUS

HQACE Regulatory

Published Jan. 23, 2023

Expiration date: 4/1/2023

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On December 30, 2022, the U.S. Environmental Protection Agency (EPA) and the U.S. Department of the Army (the agencies) announced the final "Revised Definition of 'Waters of the United States'" rule. On January 18, 2023, the rule was published in the Federal Register; the rule will be effective on March 20, 2023. The agencies developed this rule with consideration of the relevant provisions of the Clean Water Act and the statute as a whole, relevant Supreme Court case law, and the agencies’ technical expertise after more than 45 years of implementing the longstanding pre-2015 “waters of the United States” framework. This rule also considers the best available science and extensive public comment to establish a definition of “waters of the United States” that supports public health, environmental protection, agricultural activity, and economic growth. More information about the final rule is available at: https://www.epa.gov/wotus/revising-definition-waters-united-states.