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ARTICLE · 02 DECEMBER 2025

EPA Again Extends Deadline To Propose Enforceable National Drinking Water Standards For Perchlorate

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The U.S. Environmental Protection Agency (EPA) has again extended its deadline from November 21, 2025, to January 2, 2026, to issue a proposed rule setting a Maximum Contaminant Level Goal (MCLG)...

United StatesEnvironment
Joseph Zaleski
Joseph Zaleski

The U.S. Environmental Protection Agency (EPA) has again extended its deadline from November 21, 2025, to January 2, 2026, to issue a proposed rule setting a Maximum Contaminant Level Goal (MCLG) and Nationwide Primary Drinking Water regulations for the chemical perchlorate. The November 21 deadline was established in a 2016 consent decree between the Natural Resources Defense Council (NRDC) and EPA. EPA informed the court on November 21 that it had reached an agreement with NRDC to extend the rulemaking deadline to January 2, 2026, in light of the recent federal government shutdown that lasted from October 1 until November 12.

According to EPA, perchlorate is "commonly used in solid rocket propellants, munitions, fireworks, airbag initiators for vehicles, matches, and signal flares. Perchlorate may occur naturally, particularly in arid regions such as the southwestern United States and is found as an impurity in hypochlorite solutions used for drinking water

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