Statement from Allegheny County Health Department

Published on August 11, 2025

PITTSBURGH – The Allegheny County Health Department (ACHD) is actively monitoring the explosion at U.S. Steel Clairton Coke Works in coordination with emergency responders. Out of an abundance of caution, residents within one mile of the plant are advised to remain indoors, close all windows and doors, set HVAC systems to recirculate, and avoid activities that draw in outside air, such as using exhaust fans. ACHD Air Quality monitors have not detected levels of PM2.5 and So2 above federal standards. We will provide additional updates as more information becomes available.

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