(February 22, 2016, 10:50 AM EST) -- CHICAGO — A group of Chicago residents filed a putative class action in state court on Feb. 18, alleging that the City of Chicago is liable for elevated levels of lead in the city’s drinking water and that it has failed to warn residents of the danger despite its knowledge of the risk, which was created as a result of the city’s water main replacement project (Tatjana Blotkevic, et al. v. City of Chicago, No. 2016-CH-02292, Ill. Cir., Cook Co., Chancery Div.)....