Josh Kaul sues EPA for weakening rules on power plant air pollution
By Madeline Heim
Published on April 1, 2026.
Wisconsin Attorney General Josh Kaul is suing the U.S. Environmental Protection Agency (EPA) over its weakening of a rule that restricts pollution from coal and oil-fired power plants. The Mercury and Air Toxics Standards were created in 2012 to control mercury, a neurotoxin that can cause brain and nervous system damage. In February, EPA officials announced they would return to the looser 2012 standards. Kaul joined 16 other states, including Washington, D.C., the cities of Chicago and New York, and Harris County, Texas, in the lawsuit challenging the rollback of the 2024 standards. This lawsuit is not Kaul's first court challenge of the EPA's reversals of policies intended to address climate change.
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