ArcelorMittal Indiana Harbor - East Chicago, Indiana Primary Metal Facility

ArcelorMittal Indiana Harbor, located at 3210 Watling Street in East Chicago, Indiana, is a major primary metal facility operating under NAICS code 331111 (iron and steel mills). As part of the global ArcelorMittal group, it is one of the largest integrated steel mills in North America, with significant production capacity for flat-rolled steel used in automotive, construction, and industrial applications. The facility operates under the regulatory framework of the U.S. Environmental Protection Agency (EPA), including the Clean Air Act (CAA), Clean Water Act (CWA), and Resource Conservation and Recovery Act (RCRA). As a large integrated steel mill, it involves coke production, ironmaking, steelmaking, and finishing processes, which are subject to stringent emissions limits and permitting requirements. The plant's scale and complexity place it among the top tier of industrial facilities in the region. Environmental and operational significance is high due to the facility's size and its role in the regional economy. The plant employs thousands of workers and supplies critical materials to downstream industries. Its operations are closely monitored for air and water emissions, and it contributes to the local industrial base of the Great Lakes region.

East Chicago, Indiana, is part of the heavily industrialized Calumet region along Lake Michigan. The area has a history of heavy manufacturing, including steel production, oil refining, and chemical processing. This industrial concentration results in cumulative environmental pressures, particularly on air quality and water resources. The facility's proximity to residential communities raises concerns about exposure to emissions such as particulate matter, sulfur dioxide, and volatile organic compounds. Regulatory oversight by the EPA and Indiana Department of Environmental Management aims to mitigate these impacts through permits and compliance monitoring.