USS Corp/Edgar Thomson Works - Primary Metal Facility in Braddock, Pennsylvania

USS Corp/Edgar Thomson Works is a primary metal facility located in Braddock, Allegheny County, Pennsylvania, United States. The plant is operational and classified under NAICS codes 331110 and 331111, indicating iron and steel mills and steel product manufacturing. As a major industrial facility in the Pittsburgh region, it contributes significantly to the local industrial base. The facility operates under the regulatory framework of the United States Environmental Protection Agency (EPA), which enforces multi-media environmental regulations including the Clean Air Act (CAA), Clean Water Act (CWA), Resource Conservation and Recovery Act (RCRA), and Toxics Release Inventory (TRI) Section 313 reporting. These regulations govern emissions, wastewater discharges, hazardous waste management, and chemical release reporting. The plant's primary metal processes involve high-temperature operations that generate air emissions and solid wastes, requiring stringent pollution control measures. Edgar Thomson Works is one of the oldest steel plants in the United States, with historical significance in the region's industrial development. Its proximity to the Monongahela River provides access to water resources for cooling and transportation. The facility's operations have environmental implications for local air and water quality, and it is subject to community scrutiny regarding emissions and waste management. Compliance with EPA regulations is critical for its continued operation and environmental stewardship.

The facility is located in the Monongahela River Valley, an area with a long history of heavy industry. The local environmental context includes potential air quality impacts from steelmaking processes, such as particulate matter and sulfur dioxide emissions. Water discharges from the plant may affect the Monongahela River, which is a tributary of the Ohio River. The region's industrial legacy has led to ongoing remediation efforts and community concerns about pollution. Regulatory oversight by the EPA and Pennsylvania Department of Environmental Protection aims to mitigate these impacts through permits and enforcement.