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U.S. Court of Appeals for the D.C. Circuit

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U.S. Chamber files amicus brief urging D.C. Circuit to hold that EPA exceeded its authority to regulate “public water systems” under the Safe Drinking Water Act (SDWA), which is generally limited to facilities over which operators have “control”

September 19, 2025

U.S. Chamber Amicus Brief

EPA not only misconstrued the statutory term “control” to mean “access,” but acted arbitrarily and capriciously in concluding that its new SDWA regulations were feasible and cost-effective while ignoring impacts on much of the regulated industry.

Misha Tseytlin of Troutman Pepper Locke LLP served as outside counsel.

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