70 ILCS 2805/8
Every such sanitary district shall proceed as rapidly as is reasonably possible, by construction, purchase, lease or otherwise, to provide sewers and a plant or plants for the treatment and purification of its sewage, which plant or plants shall be of suitable kind and sufficient capacity to properly treat and purify such sewage so as to conduce to the preservation of the public health, comfort and convenience and to render said sewage harmless, in so far as is reasonably possible to animal, fish and plant life. Any violation of this proviso and any failure to observe and follow same, by any sanitary district organized under this Act, shall be held, and is hereby declared, to be a petty offense on the part of said sanitary district and the trustees thereof may be ousted from office as trustees of said district by an order of the court before whom the cause is heard. It shall be the duty of the Department of Public Health of the State to cause the foregoing provisions to be enforced; and upon the complaint of said Department of Public Health it shall be the duty of the Attorney General or State's Attorney of the County in which such violation may occur, to institute and prosecute such cause by indictment or information in the manner provided by law.
70 ILCS 2805/8