70 ILCS 2305/7.1
In providing works for the treatment of industrial sewage, commonly called industrial wastes, whether the industrial sewage is disposed of in combination with municipal sewage or independently, the sanitary district has power to apportion and collect therefore, from the producer thereof, fair additional construction, maintenance and operating costs over and above those covered by normal taxes, and in case of dispute as to the fairness of such additional construction, maintenance and operating costs, then the same shall be determined by an arbitration board of 3 engineers, one appointed by the sanitary district, one appointed by such producer or producers or their legal representatives, and the third to be appointed by the 2 engineers selected as above described. In the event the 2 engineers so selected fail to agree upon a third engineer then upon the petition of either of the parties the circuit judge shall appoint such third engineer. A decision of a majority of the arbitration board shall be binding on both parties and the cost of the services of the arbitration board shall be shared by both parties equally. Such decision is an administrative decision and is subject to judicial review as provided in the Administrative Review Law.
In providing works, including the main pipes referred to in Section 7, for the treatment of raw sewage, in the manner provided in this Act, whether such sewage is treated in combination with municipal sewage or independently, the sanitary district has power to collect a fair and reasonable charge for connection to its system in addition to those charges covered by normal taxes, for the construction, expansion and extension of the works of the system, the charge to be assessed against new or additional users of the system and to be known as a connection charge. Such construction, expansion and extension of the works of the system shall include proposed or existing collector systems and may, at the discretion of such district, include connections by individual properties. The charge for connection shall be determined by the district and may equal or exceed the actual cost to the district of the construction, expansion or extension of the works of the system required by the connection. The funds thus collected shall be used by the sanitary district for its general corporate purposes with primary application thereof being made by the necessary expansion of the works of the system to meet the requirements of the new users thereof.
70 ILCS 2305/7.1