Any city with a population of 25,000 or more but less than 500,000 which owns or operates its waterworks system, may contract with any person for the filtration and treatment of its water supply.
65 ILCS 5/11-134-1
Any city with a population of 25,000 or more but less than 500,000 which owns or operates its waterworks system, may contract with any person for the filtration and treatment of its water supply.
65 ILCS 5/11-134-1