A review of state records by law students at the clinic revealed that the Midwest Plant violated chromium limits at least four times since 2013. Two other spills were reported to Indiana officials last year, including one in October that the company asked Indiana regulators to keep secret.

Two months later, the state agency posted an inspection report online that showed U.S. Steel had failed to test for hexavalent chromium after the October spill, despite blue liquid “with visible solids” pouring out of a sewer pipe into the Lake Michigan tributary.

Mark Templeton, the law clinic’s director, said he was still reviewing the deal brokered by government lawyers and U.S. Steel. “We’re encouraged regulators are finally doing something,” Templeton said in an email.

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