EPA repealed Mercury and Air Toxics Standards for coal- and oil-fired power plants, again declining to monetize health benefits
On February 24, 2026, the EPA under Administrator Lee Zeldin finalized a repeal of the 2024 Mercury and Air Toxics Standards (MATS) amendments for coal- and oil-fired power plants, citing a 2020 finding that residual cancer risk was already below a presumptive acceptable threshold and eliminating continuous emissions monitoring requirements. As it had five weeks earlier in a separate rule for stationary combustion turbines, EPA did not monetize the health benefits of the toxic-pollutant reductions the standards had achieved, presenting only projected industry cost savings of $670 million through 2037. A coalition of 21 environmental and public-health organizations sued in the D.C. Circuit the following month.
