BROOK STP - Rensselaer, Indiana Wastewater Treatment Plant

BROOK STP is a municipal wastewater treatment facility located at 956 East Grace Street in Rensselaer, Indiana, within Jasper County. The plant serves a population of approximately 1,062 residents and operates under the regulatory framework of the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 378.54 megaliters per year and a similar discharge volume, the facility is sized appropriately for its small community. Secondary treatment is typical for plants of this scale in the United States, meeting federal baseline requirements for municipal wastewater. The treated effluent from BROOK STP is discharged into a local receiving water body, which ultimately drains into the larger watershed of the Kankakee River basin. This river system flows westward through Illinois and joins the Illinois River, a major tributary of the Mississippi River. The plant's operations help protect downstream aquatic habitats and water quality in the region.

BROOK STP discharges into a local waterway that is part of the Kankakee River basin, which flows into the Illinois River and eventually the Mississippi River. The Kankakee River supports diverse aquatic life and is an important migratory corridor for fish species. The plant's secondary treatment reduces organic pollutants and suspended solids, helping to maintain water quality in this inland watershed.