Tamaroa Lagoon Wastewater Treatment Plant, Tamaroa, Illinois

Tamaroa Lagoon is a municipal wastewater treatment facility located in Tamaroa, a small village in Perry County, Illinois. The plant serves a population of approximately 856 residents and operates under the regulatory framework of the United States Clean Water Act, which mandates secondary treatment for municipal discharges. The facility provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 302.83 megaliters and an annual discharge volume of 189.27 megaliters, the plant operates well within its capacity. As a lagoon-based system, it likely uses stabilization ponds for treatment, which are common in small communities. The treated effluent is discharged into local waterways that ultimately drain into the Mississippi River basin. The plant plays a key role in protecting downstream water quality in the Mississippi River system, which supports diverse aquatic life and provides drinking water for millions. Its location inland reduces direct marine impact, but proper operation remains critical for local streams and rivers.

The plant discharges into the Mississippi River basin, a vast watershed that drains much of the central United States. The receiving waters eventually flow into the Gulf of Mexico, where nutrient pollution contributes to seasonal hypoxic zones. The plant's secondary treatment helps reduce organic and nutrient loads, supporting the ecological health of local streams and the larger river system.