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(Chicago Tonight)

The lawsuit filed Wednesday by Illinois Attorney General Lisa Madigan and Lake County State’s Attorney Michael Nerheim alleges that Baxter violated a federal permit several times over a five-month span by releasing contaminated water that exceeded pollution limits. 

From City Hall to the halls of Congress, 2017 has been a transformative year. Chicago Tonight recaps the top stories of the year.

An overhead view of Watco's storage terminal at 2926 E. 126th St. in Chicago. (Google)

A Southeast Side company must install air monitors to detect levels of dust emissions from heavy metals processed on-site, according to a letter issued by the city this week.