Synopsis As Introduced Amends the Public Utilities Act. Provides that a public utility that provides both water and wastewater services may request in a general rate case proceeding that the Illinois Commerce Commission allocate a portion of the public utility's wastewater service revenue requirement for recovery through water service base rates, allocate a portion of the public utility's water service revenue requirement through wastewater base rates, or for the combination of that public utility's water service and wastewater service revenue requirements. Provides that as part of any proceeding, the public utility shall present evidence to establish, and the Commission shall consider, specified factors. Provides that if the Commission finds that an allocation or combination is in the public interest, the Commission shall enter an order approving such allocation or combination of the public utility's water and wastewater service revenue. Provides that the water service revenue requirement or wastewater service revenue requirement may not be increased by more than 3.5% through an allocation from the water service revenue requirement or wastewater service revenue requirement. Effective immediately.