"Unsafe levels of fecal coliform, or E. coli, have been identified in about 500 miles of the 981-mile river, which stretches from Pittsburgh to the Mississippi River at Cairo, Ill."
Details in the NYT at http://www.nytimes.com/...o%20River&st=cse
Details in the NYT at http://www.nytimes.com/...o%20River&st=cse