TMS International

The TMS International facility in Braddock is the tenth-most toxic active air polluter in Allegheny County (originally eleventh-most toxic, this facility moved up the list with the closed of the Koppers Inc. Clairton Tar Plant in late 2016). Approximately 91,600 people live within three miles of this steel plant.

This facility processes the molten steel produced at the neighboring U.S. Steel Edgar Thomson plant – the eleventh-most toxic active Allegheny County air polluter. The Allegheny County Health Department (ACHD) labels the TMS International plant a “minor” air polluter, but requires the facility to operate with a “major” permit due to its connection with the Edgar Thomson plant. In 2016 and 2017, the Edgar Thomson plant repeatedly violated its emissions limits, and the ACHD eventually partnered with the U.S. Environmental Protection Agency (EPA) to take enforcement action in November 2017.

The EPA and local environmental groups have identified Braddock as an area with unhealthy levels of air pollution, in part due to steel manufacturing and processing. In 2012, using an EPA grant, the Group Against Smog and Pollution trained local Braddock high schoolers to take air quality measurements around the community. The lowest PM2.5 measurements they recorded were still 57 percent higher than the levels designated in the EPA’s National Ambient Air Quality Standards.

Health EffectsChemicals
CancerChromium Compounds, Lead Compounds, Nickel
Cardiovascular System ImpactsLead Compounds
Nervous System ImpactsLead Compounds, Manganese Compounds
Respiratory System ImpactsChromium Compounds, Manganese Compounds, Nickel

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