(NBC News) Ohio Attorney General Mike DeWine sued agricultural giant Monsanto on Monday, alleging the company concealed dangers posed by a toxic chemical compound it manufactured for nearly a half century.

In the suit, filed in the Hamilton County Common Pleas Court in Cincinnati, prosecutors argued that the company should pay for the clean-up of what it says are dozens of rivers, lakes and other water bodies contaminated with polychlorinated biphenyls, or PCBs.

Ohio Attorney General Mike DeWine speaks during a news conference at the attorney general’s office on May 31, 2017 in Columbus, Ohio. Brooke LaValley / The Columbus Dispatch via AP file

“Monsanto should be held responsible for the damage it caused,” DeWine said in a statement.

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