States sue Trump administration over toxic air rule rollback

By: Alex Brown

Outlets: Stateline

Published: March 31, 2026

Words: 285

Last Updated: 4 months ago

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A coalition of 21 state and local governments filed a lawsuit Tuesday challenging the Trump administration’s repeal of a 2024 rule that established limits for toxic air pollutants.

The regulation, known as the Mercury and Air Toxics Standards rule, limits emissions from coal- and oil-fired power plants. It covers pollutants including mercury, arsenic, lead and other toxic metals, as well as acid gases.

The U.S. Environmental Protection Agency updated the rule in 2024, which proponents …

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