Lisbon T STP and On Site Systems - Secondary Wastewater Treatment in Town of Lisbon, New York

Lisbon T STP and On Site Systems is a municipal wastewater treatment facility located in the Town of Lisbon, St. Lawrence County, New York. The plant serves a small population of 260 residents, reflecting its role in a rural community. It operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal discharges. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 189.27 cubic meters per day and an actual discharge volume of 94.64 cubic meters per day, the facility operates well within its capacity. As a small plant in New York, it is subject to state-level NPDES permits issued by the New York State Department of Environmental Conservation. The treated effluent is discharged into a local waterway that ultimately drains into the St. Lawrence River, which flows into the Gulf of St. Lawrence and the Atlantic Ocean. The plant helps protect the St. Lawrence River watershed, a vital ecosystem supporting diverse aquatic life and recreational activities.

The plant discharges into a tributary of the St. Lawrence River, which flows northeast into the Gulf of St. Lawrence and then the Atlantic Ocean. The St. Lawrence River is a major ecological corridor supporting fish species such as lake sturgeon and American eel. The surrounding watershed includes agricultural and forested areas, making nutrient management important to prevent algal blooms in downstream waters.