65 ILCS 5/11-128-4

The corporate authorities have the power to carry into execution the contract for the purchase, construction, or enlargement of waterworks when ratified by the electors, as directed in Section 11-128-3, and to employ a superintendent and such other employees as may be necessary and proper for the operation of the waterworks, for the collection of water rentals, and for the conduct of the business necessary to the operation thereof.