OTTO TWP STP - Advanced Wastewater Treatment in Otto Township, Pennsylvania

OTTO TWP STP is a municipal wastewater treatment facility located in Otto Township, McKean County, Pennsylvania. Serving a population of 2,247, the plant provides advanced treatment to protect local water quality in this rural region of the Allegheny Plateau. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 870.64 units and a discharge volume of 870.65 units, it operates near full capacity. As a U.S. facility, it is subject to the Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting, ensuring compliance with effluent limits. The treated effluent is discharged into a local waterway that ultimately drains into the Allegheny River basin, part of the larger Ohio River watershed. This region supports diverse aquatic life and is important for recreational fishing and drinking water supplies downstream.

The plant discharges into a tributary of the Allegheny River, which flows into the Ohio River and then the Mississippi River to the Gulf of Mexico. The local watershed supports coldwater fisheries and is ecologically sensitive due to its forested headwaters and karst geology, which can affect groundwater recharge.