NORRIS STP - Secondary Wastewater Treatment Plant in Norris City, Illinois

NORRIS STP is a municipal wastewater treatment plant located in Norris City, White County, Illinois. It serves a small community of approximately 213 residents, providing secondary treatment to manage domestic wastewater. The plant is part of the region's infrastructure for protecting public health and water quality. The plant provides secondary treatment, which is the standard biological treatment required by the U.S. Clean Water Act for municipal facilities. With a designed capacity of 109.78 million gallons per day and an average daily flow of 79.49 million gallons, it operates at about 72% capacity. This level of treatment effectively removes organic matter and suspended solids before discharge. The treated effluent is discharged into a local receiving water body, which eventually drains into the Ohio River basin. This watershed supports diverse aquatic life and provides water resources for communities downstream. Proper treatment at NORRIS STP helps maintain the ecological health of these waters.

The plant discharges into a local stream that flows into the Ohio River basin, a major tributary of the Mississippi River. This watershed supports diverse aquatic habitats and is important for regional biodiversity. The secondary treatment process reduces nutrient and pollutant loads, helping to protect downstream water quality and aquatic ecosystems.