According to a press release from PennEnvironment and Clean Air Council:
"The suit, in which the Allegheny County Health Department (ACHD) intervened as a co-plaintiff, was filed in response to 102 consecutive days of massive, illegal emissions of sulfur dioxide and hydrogen sulfide after a catastrophic fire at the Clairton Coke Works on Christmas Eve in 2018. That blaze, caused by corroded equipment and defective safety systems, knocked out several essential pollution controls at Clairton, which the Irvin and Edgar Thomson steel mills also rely on – yet U.S. Steel continued to run those plants without these legally mandated controls. Violations caused by two subsequent breakdowns at the Clairton Coke Works, in June 2019 and July 2022, were also included in the suit."
Members and Friends of the First Unitarian Church of Pittsburgh during a Valley Clean Air Walking Tour infront of Clairton Coke Works in April, 2023.