Marathon V STP - Advanced Wastewater Treatment in Village of Marathon, New York

Marathon V STP is an advanced wastewater treatment facility located in the Village of Marathon, Cortland County, New York. Serving a population of 1,048, the plant is part of the municipal infrastructure that manages wastewater for this small upstate community. The plant employs advanced treatment processes, exceeding the secondary treatment standard required by the US Clean Water Act. With an annual discharge volume of 193.06 million gallons and a designed capacity of 757.08 million gallons, the facility operates well below its capacity, indicating room for future growth or seasonal variability. The treated effluent is discharged into a local waterway that ultimately drains into the Susquehanna River basin, which flows into Chesapeake Bay. The plant's advanced treatment helps protect downstream water quality in this ecologically significant watershed, supporting aquatic life and recreational uses.

The plant discharges into a tributary of the Susquehanna River, which flows through New York and Pennsylvania before emptying into Chesapeake Bay. This watershed supports diverse aquatic species and is an important migratory corridor for fish. The advanced treatment at Marathon V STP reduces nutrient loads, helping to mitigate eutrophication risks in the bay.