CHICAGO (AP) — The city of Chicago is suing U.S. Steel, alleging that it violated federal law with discharges of a potentially carcinogenic chemical from a northwest Indiana plant.
The federal lawsuit filed Wednesday comes a week after the Surfrider Foundation’s Chicago chapter filed a similar suit against the steelmaker.
Chicago’s complaint alleges U.S. Steel violated the Clean Water Act and its wastewater permit with illegal discharges from its Portage, Indiana, plant into a Lake Michigan tributary.
It says those violations occurred during an April 2017 spill of nearly 300 pounds (135 kilograms) of hexavalent chromium, and an October chromium spill.
Mayor Rahm Emanuel said in a statement that U.S. Steel’s actions threaten Lake Michigan — Chicago’s “most precious natural resource.”
U.S. Steel has said it regrets the spills.