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Engineering Design & Testing Corp. Releases Preliminary Findings on Deadly U.S. Steel Explosion at Clairton Coke Works
A Connecticut engineering firm retained by U.S. Steel to investigate the deadly Aug. 11 explosion at its Clairton Coke Works facility today released preliminary findings. The firm, Engineering Design & Testing 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 subsequently exploded. The valve was originally manufactu
Oct 162 min read


Allegheny Co. Health Dept. Releases New Details About Air Quality Following Deadly U.S. Steel Explosion
The Allegheny County Health Department (ACHD) on Friday released new details related to air quality monitoring in the wake of the deadly...
Sep 192 min read


GASP to Board of Health: More Needs to Be Done to Alert Residents During Industrial Emergencies
Last month’s deadly explosion at U.S. Steel’s Clairton Coke Works left the community reeling, and while the Allegheny County Health...
Sep 182 min read


BREAKING: ACHD Partners with PA DEP, CMU to Increase Air Quality Monitoring in the Mon Valley in Wake of Explosion
The Allegheny County Health Department (ACHD) announced Mobile Air Units provided by state Department of Environmental Protection (DEP) and Carnegie Mellon University (CMU) will be stationed in the Mon Valley today and tomorrow. Here's the press release issued Thursday afternoon: This increased air quality monitoring is part of the ACHD Air Quality program's continued investigation of the incident at the Clairton Coke Works on Monday, August 11, 2025.   The addition of the Mo
Aug 141 min read


Clairton Coke Works Explosion: What Comes Next with Air Quality (And Why We Need YOU)
Yes, public officials, the Allegheny County Health Department, regulatory and citizen monitors all confirmed that before, during, and...
Aug 143 min read


UPDATED: Two Dead, 10 Injured in Explosion at U.S. Steel's Clairton Coke Works; ACHD Issues Warning
UPDATE: Late Monday afternoon, Allegheny County released this update: Allegheny County Emergency Services (ACES) and Allegheny County Police (ACPD) remain on scene of the confirmed explosion at U.S. Steel Clairton Coke Works plant. Officials can confirm there has been a second fatality in connection with this incident. This was the last of the two individuals that was initially unaccounted for. Additionally, ten people were transported to area hospitals to be treated for a va
Aug 113 min read
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