65 ILCS 5/11-147-3

Every municipality lying within or partly within the corporate limits of, or adjacent to, any sanitary district which was organized under "An Act to create sanitary districts in certain localities, to drain and protect the same from overflow for sanitary purposes and to provide for sewage disposal," approved May 17, 1907, as heretofore and hereafter amended, and which is authorized to collect, carry-off, dispose of, and treat sewage and industrial wastes, may enter into a contract with this sanitary district upon such reasonable terms as may be agreed upon, for the use of the drains, conduits, treatment plants, pumping plants, and works maintained by the sanitary district for the carrying-off, disposal, and treatment of sewage and industrial wastes.