WAYNE CITY STP - Secondary Wastewater Treatment Plant in Wayne City, Illinois

WAYNE CITY STP is a municipal wastewater treatment plant located at 1099 South Main Street in Wayne City, Illinois, United States. The facility serves a population of 1,461 residents and operates under secondary treatment standards, which is the minimum required by the US Clean Water Act for municipal plants of this scale. The plant has a designed capacity of 719.23 thousand cubic meters and processes an annual discharge volume of 264.98 thousand cubic meters. As a secondary treatment facility, it uses biological processes to reduce organic matter and suspended solids before discharge. The plant is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Illinois Environmental Protection Agency. The treated effluent is discharged into a local receiving water body, which ultimately drains into the Mississippi River basin. This watershed supports diverse aquatic life and provides water resources for communities downstream. The plant's location in rural Illinois means its discharge contributes to the overall water quality of the region's streams and rivers.

The plant discharges into a local waterway that is part of the Mississippi River basin, one of the largest drainage systems in North America. The receiving waters support a variety of fish and wildlife species, including migratory birds and freshwater mussels. Downstream, the Mississippi River flows into the Gulf of Mexico, where nutrient loading from upstream sources can contribute to hypoxic zones. The plant's secondary treatment helps reduce organic pollutants and protect local water quality.