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D.C. Circuit Upholds EPA’s Mercury and Air Toxics Standards

April 17, 2014

By KEVIN POLONCARZ & BEN CARRIER

On April 15, 2014, the United States Court of Appeals for the D.C. Circuit (D.C. Circuit) issued a decision upholding the U.S. Environmental Protection Agency’s (EPA) Mercury and Air Toxics Standards (MATS) governing emissions of hazardous air pollutants (HAPs) from existing coal- and oil-fired electric generating units, including mercury, arsenic, chromium, nickel and acid gases. White Stallion Energy Center, LLC v. EPA, No. 12-1100 (D.C. Cir., Apr. 15, 2014).