Conn. Gen. Stat. § 7-270: Application to existing systems.

Any municipality, for all or any part of any existing sewerage system, may exercise any authority of this chapter pertaining to the operation of a sewerage system and may establish sewerage use charges, in the manner hereinbefore provided, to pay the cost of operation of such sewerage system or for the payment of all or any part of bonds or notes issued for the acquisition or construction of such sewerage system, including interest thereon.