Preliminary air monitoring results show no immediate health risks following last month’s deadly explosion at U.S. Steel’s Clairton Coke Works, Allegheny County health officials announced Friday.

Mobile air monitoring units from Carnegie Mellon University and the Pennsylvania Department of Environmental Protection were deployed in the Mon Valley shortly after the Aug. 11 blast, which killed two workers and injured 10 others.

Both agencies’ monitoring equipment, along with the county’s stationary monitors, detected no exceeding of federal air quality standards, according to the health department.

The DEP’s monitors showed short-term exposure limits did not exceed limits set by the U.S. Environmental Protection Agency.

CMU’s data, which is still undergoing final processing and quality ch

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