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EPA repeals mercury rules, letting Colstrip plant run without emission limits, citing cost and feasibility.
The EPA has repealed the Mercury and Air Toxics Standards (MATS), allowing Montana’s Colstrip power plant to continue operating without meeting previous mercury and pollutant emission limits.
The move, finalized in February 2026, follows a formal exemption request citing technical and economic infeasibility, and is expected to save households up to $1.7 billion annually.
The agency says the repeal supports energy reliability and affordability, especially in winter, while critics warn it increases health risks from air pollution, particularly for downwind communities.
Environmental and health groups argue the decision undermines public health and the Clean Air Act, and legal challenges are anticipated.
La EPA deroga las reglas de mercurio, permitiendo que la planta de Colstrip funcione sin límites de emisiones, citando el costo y la fiabilidad, lo que genera preocupaciones legales y de salud.