Pleasant Hill WWTP - Secondary Treatment Facility in Pleasant Hill, Illinois

Pleasant Hill WWTP is a municipal wastewater treatment facility located in Pleasant Hill, Pike County, Illinois. Serving a population of about 1,119, the plant is part of the community's essential infrastructure for managing domestic wastewater. The plant provides secondary treatment, a standard level required by the US Clean Water Act for municipal facilities. With a designed capacity of 492.10 volume units and a discharge volume matching that figure, the plant operates at full capacity. As a small-scale facility, it is subject to EPA NPDES permitting through the Illinois Environmental Protection Agency. The treated effluent is discharged into local streams that drain into the Mississippi River basin. This discharge supports the ecological health of downstream waters, including the Mississippi River, which is a major migratory corridor for aquatic species and a vital water resource for the region.

The plant discharges into tributaries of the Mississippi River, which flows into the Gulf of Mexico. The Mississippi River basin supports diverse aquatic life and is an important migratory route for fish and birds. The plant's secondary treatment helps reduce nutrient and pollutant loads, contributing to the health of this vast watershed.