Updates
Updates on Aug. 11, 2025, Incident at U. S. Steel’s Clairton Plant
Update – Air Monitoring Results
09/19/2025
U. S. Steel worked collaboratively with the Allegheny County Health Department and their partners to monitor air quality after the incident at our Clairton facility. Their preliminary findings, announced today, coincide with U. S. Steel’s own air quality tests, which found no ambient air exceedances or increased risks from the incident. U. S. Steel continues to monitor air quality at the Clairton facility and will continue to cooperate with all regulatory agencies.