Steel to investigate the deadly Aug. 11 explosion at its Clairton Coke Works facility today released Corp., issued the following information on its website Thursday: The explosion took place in the 13-14 Coke Battery transfer area when an 18-inch cast iron valve ruptured, releasing flammable coke oven gas, which Damage to other valves at 13-14 Coke Battery was determined to have resulted from the explosion. This resulted in a sudden and complete rupture of the valve body, releasing combustible coke oven gas

Steel’s Clairton Coke Works, which claimed the lives of two workers, hospitalized others, and again shook the Mon Valley to its core.

Steel’s Clairton Coke Works facility that prompted a public statement from the Allegheny County Health the breakdown were preliminary: On the afternoon of June 2 an unknown breakdown occurred at Clairton Coke Works’ Control Room #5 that caused coke oven gas to only be partially cleaned before being emitted into Namely, that during the nearly eight hours that Clairton Coke Works’ Control Room #5 was offline, the Steel met the deadlines set forth for reporting the June 2 Clairton Coke Works breakdown. U.S.

The Aug. 11, 2025 explosion at the Clairton Coke Works killed two, injured a dozen more, and rocked an stationed in Reversing Rooms and a break room located just 10 to 20 feet directly above high-pressure coke Despite the inherent volatility of coke oven gas—a mixture that is both toxic and highly flammable—these stationed in the reversing rooms and breakroom located 10-20 feet directly above the high-pressure coke to understand or evaluate the hazards of working on a valve containing live, pressurized, flammable coke

Steel’s Clairton Coke Works this past January - the one that prompted the Allegheny County Health Department first consecutive calendar day for excess H2S grain loading where sulfur dioxide emissions at Clairton Coke According to ACHD’s March 10 demand for stipulated penalties, the Clairton Coke Works emitted 22.6 tons

government’s struggle against its own revised National Emission Standards for Hazardous Air Pollutants for coke Quick background: The EPA promulgated the Revised Coke Oven NESHAPs in 2024.  ; and imposed new limits on leaking coke oven doors, lids, and offtake piping. Steel and Cleveland Cliffs (the operators of the Clairton Coke Works and Monessen Coke Works, respectively ) asked for compliance extensions from the deadlines imposed by the Revised Coke Oven NESHAPs.  

Steel’s Clairton Coke Works facility Monday evening that knocked out pollution control equipment that removes dangerous chemicals like H2S and ammonia from coke oven gas. That means that only partially cleaned coke oven gas spewed from the facility for eight hours. Control Room 5 was also one of three at the Clairton Coke Works that experienced an outage during the breakdown report, but did not note whether it was received within the one-hour window required by Clairton Coke

implementation of the revised National Emission Standards for Hazardous Air Pollutants (NESHAPs) for coke EPA now says that the data that it received from the coke industry regarding its rates of compliance

The Group Against Smog and Pollution (GASP) has submitted comments on Cleveland Cliffs’ Monessen Coke The facility is a conventional coke plant producing coke and related carbon by-products and is located The Monessen Coke Works facility includes two coke batteries, by-products recovery process plant, boiler

Yesterday, EPA announced that it also plans to delay full implementation of the revised NESHAPs for Coke Ovens and Coke Oven Batteries, which will impact both U.S. Steel’s Clairton Coke Works and Cleveland Cliffs’ Monessen Coke Works.   the following delays to these rules that will apply at Clairton and Monessen: The requirement that coke and battery stacks will be delayed from January 6, 2026 to July 5, 2027; and New limits on leaking coke