The Cortland Wastewater Treatment Facility first entered service in 1939, providing primary sewage treatment to the City of Cortland. A major upgrade in the mid 70's and another completed in 1995 have resulted in a facility providing advanced secondary wastewater treatment to the City of Cortland, Village of Homer, Town of Cortlandville and Village of McGraw.
Wastewater treatment consists of gravity clarification and the activated sludge biological process.
From May 15 to October 15, the treated wastewater is disinfected with chlorine then dechlorinated before being discharged to the Tioghnioga River.