A sanitary district is formed to be known as the Eastern Will Sanitary District for the purpose of constructing, acquiring, operating, improving, extending, and maintaining a plant or plants for the purification and treatment of sewage; the maintenance of one or more outlets for the drainage of sewage that has been treated and purified by these plant or plants; and for the purpose of constructing, acquiring, operating, improving, extending, and maintaining one or more waterworks.
70 ILCS 3020/5