Ind. Code § 16-41-25.5-2

Sec. 2. As used in this chapter, "publicly owned treatment works" means a treatment works, as defined in Section 212(2) of the federal Clean Water Act (33 U.S.C. 1292(2)), that is owned by the state or a municipality, as defined in Section 502(4) of the federal Clean Water Act (33 U.S.C. 1362(4)), except that it does not include pipes, sewers, or other conveyances that are not connected to a facility providing treatment.