Madrid T STP and On Site Sys - Madrid, New York Wastewater Treatment Plant

Madrid T STP and On Site Sys is a municipal wastewater treatment plant located in Madrid, New York, a small town in Saint Lawrence County. The plant serves a population of approximately 800 residents and operates under the regulatory framework of the United States Clean Water Act, which governs wastewater discharges through the National Pollutant Discharge Elimination System (NPDES). The plant provides secondary treatment, a standard level required for most municipal facilities in the US. It has a designed capacity of 473.18 million gallons per year and currently discharges 242.27 million gallons annually. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into a local water body that ultimately drains into the St. Lawrence River watershed. The St. Lawrence River flows northeast into the Gulf of St. Lawrence and the Atlantic Ocean. The plant's location in a rural, inland area means its discharge supports local stream health and downstream aquatic ecosystems.

The plant discharges into a tributary of the St. Lawrence River, which flows into the Gulf of St. Lawrence and the Atlantic Ocean. The St. Lawrence River watershed supports diverse aquatic life, including fish species such as walleye and northern pike. The plant's secondary treatment helps protect water quality in this ecologically important river system.