Metal Industry News

ArcelorMittal Reports Acceptable Levels of Cyanide, Ammonia

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ArcelorMittal reported that ammonia and cyanide measurements at two outfall locations demonstrated  below permitted levels for three consecutive days. The levels reflected normal day-to-day fluctuations while maintaining compliance, a company spokesperson reported.

Additionally, water sampling results for cyanide from 13 different instream locations showed non-detect for three consecutive days.  

As a result of consistent sampling results, the National Park Service, in partnership with Indiana Department of Environmental Management and the U.S. Environmental Protection Agency, reopened the Portage Lakefront and Riverwalk Beach in the Indiana Dunes National Park Aug. 22. 

Further testing entering the holiday weekend continued to show levels that met compliance, the company reported.

In early August, a failure at the blast furnace water recirculation system resulted in the release of wastewater containing excess levels of ammonia and cyanide into Lake Michigan.