The U.S. Supreme Court has opted not to grant requests from Republican-led states and industry groups to suspend two significant rules instituted by the Environmental Protection Agency (EPA). These rules, targeting emissions from coal-fired power plants and methane releases from crude-oil and natural gas facilities, will remain operative as ongoing legal challenges proceed in federal appeals court in Washington, D.C. This decision follows the Court’s earlier choice to temporarily put a different EPA statute aimed at curbing cross-state air pollution on hold.
The rulings come as a response to attempts led by North Dakota and allied challengers including 23 Republican-led states as well as various power plant, mining, and industry entities. The challengers argue that the rules impose financial burdens estimated in the billions of dollars with insufficient public health benefits, asserting that the new standards are a strategic move to transition away from coal-based energy, a policy direction they claim the EPA is legally powerless to enforce (SCOTUSblog).
The first rule falls under the “Hazardous Air Pollutants” framework, established by the Clean Air Act, focusing on harmful emissions such as mercury and arsenic. The second rule, unveiled by the EPA in March, proposes stringent controls on methane emissions, a powerful greenhouse gas. Initial appeals to stay these rules were thwarted by the U.S. Court of Appeals for the District of Columbia Circuit earlier this year. Consequently, challengers sought the intervention of the Supreme Court in August, which has now declined to put the regulations on hold through unsigned orders absent any explanation or noted dissent among the justices.
This development leaves the contested EPA regulations in effect while the federal D.C. Circuit Court undertakes a full review, a process closely monitored by legal practitioners as it potentially sets a course for future environmental regulatory actions. Meanwhile, related challenges to an additional EPA rule focused on reducing carbon dioxide emissions from power plants remain under consideration, with briefs filed and awaiting Court action since July.