65 ILCS 5/11-125-3

The corporate authorities may make all needful rules and regulations concerning the use of water supplied by the waterworks of the city or village, and may do all acts and make such rules and regulations for the construction, completion, management, or control of the waterworks, and for the fixing and collecting of such water rates or rents as the corporate authorities may deem necessary or expedient. The corporate authorities may levy a general tax for the construction and maintenance of the waterworks, and appropriate money therefor.