35 Ill. Adm. Code 380.210
Exceptions
Section 380
Section 380.210 Exceptions
a) A wastewater treatment works is not required to have a Chief
Wastewater Operator on its operational staff if the wastewater treatment works
is operated as part of a public water supply, treats waste generated only by that
supply, and has designated a Responsible Operator in Charge pursuant to the
Public Water Supply Operations Act [415 ILCS 45].
b) Collection systems are not required to be under the direct
supervision of a Chief Wastewater Operator.