The Ontario Ministry of Environment, Conservation and Parks (MECP) Air Regulations include Site Specific Standards and Technical Standards pathways that provide opportunity for industries like steel to transition away from current technology while continuously improving performance.

Site Specific Standards consider risks to communities, available technology and/or economic issues and require improvements in environmental performance to be made over time.  

Currently, ArcelorMittal Dofasco has Site Specific Standards for 5 compounds (Total Suspended Particulate (TSP), Total Reduced Sulphur (TSR), Benzo(a)pyrene, Benzene and Manganese). Emissions of each of these compounds from ArcelorMittal Dofasco’s site are currently below the MECP Standards established in 2015 and have all shown significant improvement (from 25 percent to 75 percent improvement).   

In addition, ArcelorMittal Dofasco’s eventual transformation of the steelmaking process means that Benzene, Benzo(a)pyrene and Total Reduced Sulphur (TSR) would be eliminated from the process, while further reductions in Total Suspended Particulate (TSP) and Manganese would be realized. This transformation will result in a greener, safer environment for all. 

In the meantime, the company respects Ontario’s regulations and will continue to operate within the Regulations. The company will also continue to invest in our assets and maintain our commitment to continuously improve – minimizing environmental impact. 

ArcelorMittal Dofasco is committed to continuous improvement in every aspect of the company’s operations. The company has been in Hamilton for the past 111 years and continues to demonstrate its commitment to continuous improvement in all aspects of its business, planning and reacting appropriately and responsibly where there may be environmental or community impact from operations, positively contributing to the region, and being responsible corporate member of the Hamilton community.   

About ArcelorMittal Dofasco

About ArcelorMittal Dofasco ArcelorMittal Dofasco is Canada’s largest producer of flat carbon steel and is part of the world’s largest steel and mining company. Headquartered in Hamilton, ON, with more than 4,500 employees each year we ship 4.5 million net tons of high-quality flat carbon steel to partners in automotive, energy, packaging and construction which are used in increasingly lighter, stronger and more sustainable products – from cans to cars. Our purpose is to produce ever smarter steels that have a positive benefit for people and planet. High performance steels made using innovative processes which use less energy, emit significantly less carbon and reduce costs. Steels that are cleaner, stronger and reusable. With steel at our core, our inventive people and an entrepreneurial culture at heart, we will support the world in making that change. This is what we believe it takes to be the steel company of the future. For more information about ArcelorMittal Dofasco, please visit:

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