Germantown STP - Secondary Wastewater Treatment Plant in Germantown, Illinois

Germantown STP is a municipal wastewater treatment facility located at 801 Carlyle Road in Germantown, Illinois, a small community in Clinton County. The plant serves a population of 1,246 and is part of the region's water infrastructure. The facility provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal plants. It has a designed capacity of 529.96 thousand gallons per day and currently discharges 454.25 thousand gallons per day. As a US plant, it operates under an NPDES permit issued by the Illinois Environmental Protection Agency. The treated effluent is discharged into a local waterway that drains into the Kaskaskia River basin, ultimately reaching the Mississippi River. This watershed supports diverse aquatic life and is an important corridor for migratory fish species.

The plant discharges into a tributary of the Kaskaskia River, which flows into the Mississippi River. The Kaskaskia River basin supports a variety of fish and wildlife, including species that rely on clean water for spawning and habitat. Downstream, the Mississippi River is a major ecological corridor for migratory birds and aquatic species.