ST JACOB STP - Secondary Wastewater Treatment Plant in St. Jacob, Illinois

ST JACOB STP is a municipal wastewater treatment facility located in St. Jacob, Illinois, United States. The plant serves a population of about 998 residents, reflecting its role as a small community treatment system in Madison County. The plant provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for municipal wastewater. With a designed capacity of 529.96 cubic meters per day and an average daily discharge of 227.13 cubic meters, the facility operates well within its capacity, indicating reliable treatment performance. The treated effluent is discharged into local waterways that ultimately drain into the Mississippi River basin. This contributes to the protection of downstream aquatic ecosystems and supports the overall water quality goals of the region.

The plant discharges into local streams that are part of the Mississippi River watershed. This river system supports diverse aquatic life and provides habitat for fish and migratory birds. The secondary treatment process helps reduce nutrient and organic pollutant loads, protecting downstream water quality in the Mississippi River and the Gulf of Mexico.