A Citgo refinery in Lemont. (WTTW News)

Oil refineries are discharging toxic pollutants into our waterways and the Great Lakes with little oversight from regulators, according to a new report from the Environmental Integrity Project, a nonpartisan nonprofit group that advocates for enforcement of environmental law

In this Sept. 21, 2017 file photo, the BP Whiting refinery in East Chicago, Ind., is shown on Sept. 21, 2017. Oil giant BP agreed Thursday, Dec. 2, 2021, to pay a $512,450 penalty and reduce soot emissions from its Whiting refinery in Indiana under an agreement with regulators and activists who accused the company of violating an earlier deal. (DroneBase via AP, File)

The U.S. District Court settlement modifies a previous consent decree that required BP Products North America Inc. to limit releases from the sprawling facility on the southwestern shore of Lake Michigan.