OSHA Cites Two Companies in US Steel 2025 Explosion
On February 18, OSHA cited two Pennsylvania employers after a federal investigation into an August 2025 explosion at a United States Steel Corp. worksite.
That explosion claimed the lives of two employees and injured 12 others.
OSHA concluded United States Steel Corp. and MPW Industrial Services Inc. exposed workers at the Clairton Coke Works plant to unsafe working conditions, including explosion, struck-by, and high-pressure injection hazards.
Federal safety inspectors determined that United States Steel Corp. failed to use required safety management and energy control practices for hazardous work involving flammable gas.
OSHA also concluded that cleaning services contractor MPW Industrial Services failed to provide a relief valve for a high-pressure water system and did not coordinate energy control practices for hazardous work involving flammable gas.
OSHA cited United States Steel Corp. with seven serious and one other-than-serious violations and proposed $118,214 in penalties.
The agency cited MPW Industrial Services Inc. with four serious and two other-than-serious violations and proposed $61,473 in penalties.
Resources from OSHA include controlling hazardous energy, the agency’s general duty clause, permit-required confined spaces, and process safety management.
Employers may contact the agency for information about OSHA’s compliance assistance resources and for free help on complying with OSHA standards.