On June 11, 2025, the U.S. Environmental Protection Agency ("EPA") announced a proposed rule to repeal key amendments to the 2024 Mercury and Air Toxics Standards ("MATS") for coal- and oil-fired electric utility steam...more
President Donald Trump's April 8, 2025, proclamation extends the compliance deadline for the EPA's Mercury and Air Toxics Standards (MATS) by two years, from July 8, 2027 to July 8, 2029, asserting national security concerns...more
EPA filed a status report on October 15 in the slow-moving mercury and air toxics (MATS) litigation, which is now Murray Energy Corp. v. EPA, No. 16-1127 (D.C. Cir., filed April 26, 2016). The case is a challenge to EPA...more
This is the second issue of WilmerHale’s 10-in-10 Hot Topics in Energy Series. Over the next 10 weeks, our attorneys will share insights on current and emerging issues affecting the US energy sector. Attorneys from across...more
Outlined in an Environmental Protection Agency ("EPA") proposal published on August 31, 2018, the Affordable Clean Energy ("ACE") rule would replace the Obama Administration's Clean Power Plan ("CPP"). A 60-day public comment...more