70 ILCS 2605/220
As of November 14, 1973, the corporate limits of the Metropolitan Sanitary District of Greater Chicago are extended so as to embrace and include within the same the territory and tracts of land situated in the County of Cook, State of Illinois, described as follows:
Those portions of Sections 19, 20 and 29 lying South of the centerline of the Little Calumet River, all in Township 36 North, Range 15 East of the Third Principal Meridian; also all of Sections 30, 31 and 32, all in Township 36 North, Range 15 East of the Third Principal Meridian; also all of Sections 5 and 6, Township 35 North, Range 15 East of the Third Principal Meridian (except those portions thereof which are now within the corporate limits of the Metropolitan Sanitary District of Greater Chicago); also the East 1/2 of Sections 25 and 36, all in Township 36 North, Range 14 East of the Third Principal Meridian (except those portions thereof which are now within the corporate limits of the Metropolitan Sanitary District of Greater Chicago).
70 ILCS 2605/220