Great Lakes (IL IN MI MN OH WI)

PFOS: "3M Pollution Study Finds Mixed Results

"Levels of PFOS, a chemical manufactured by 3M Co. for a variety of commercial uses until about 10 years ago, have improved significantly in the Mississippi River between Hastings and St. Paul -- except for the area around the company's Cottage Grove plant, where they have worsened."

Source: Minneapolis Star Tribune, 01/29/2013

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