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Supreme Court weakens EPA power to enforce Clean Water Act

Justice Samuel A. Alito Jr., writing for a five-justice majority, said the EPA’s interpretation of its powers went too far

Updated May 25, 2023 at 5:47 p.m. EDT|Published May 25, 2023 at 10:34 a.m. EDT
The U.S. Supreme Court building. (Anna Moneymaker/Getty Images)
9 min

The Supreme Court on Thursday cut back the power of the Environmental Protection Agency to regulate the nation’s wetlands, another setback for the agency’s authority to combat air and water pollution.

At issue was the reach of the landmark 51-year-old Clean Water Act and how courts should determine what count as “waters of the United States” under protection of the law. Nearly two decades ago, the court ruled that wetlands are protected if they have a “significant nexus” to nearby regulated waters.