Hanna City STP - Secondary Wastewater Treatment Plant in Hanna City, Illinois

Hanna City STP is a municipal wastewater treatment facility located in Hanna City, Illinois, a small community in Peoria County. The plant serves a population of approximately 1,310 residents, providing essential sanitation services for the area. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater facilities. With a designed capacity of 1,022.06 volume units and a current discharge volume of 567.81 units, the plant operates below its maximum capacity. As a US facility, it operates under a National Pollutant Discharge Elimination System (NPDES) permit issued by the Illinois Environmental Protection Agency, which sets effluent limits to protect water quality. The treated effluent from Hanna City STP is discharged into local streams that are part of the Illinois River watershed. The Illinois River flows into the Mississippi River, which ultimately drains into the Gulf of Mexico. The plant plays a role in protecting downstream water quality in this major river system, which supports diverse aquatic life and is an important migratory corridor for birds and fish.

Hanna City STP discharges into tributaries of the Illinois River, which flows into the Mississippi River and then to the Gulf of Mexico. The Illinois River watershed supports diverse aquatic ecosystems, including fish and migratory birds. The plant's secondary treatment helps reduce nutrient and pollutant loads, contributing to the health of downstream waters.