LEOLA STP - Secondary Wastewater Treatment Plant in Leola, South Dakota

LEOLA STP is a municipal wastewater treatment facility located in Leola, South Dakota, serving a small population of 521 residents. The plant is situated in McPherson County and provides secondary treatment to meet local environmental standards. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. With a designed capacity of 378.54 m³/day and an average discharge volume of 189.27 m³/day, the facility is operating at approximately 50% of its capacity, indicating room for future growth. The treated effluent is discharged into local waterways that drain into the James River basin, ultimately reaching the Missouri River. The plant plays a key role in protecting downstream water quality in the Northern Plains region, supporting aquatic life and agricultural water use.

The plant discharges into tributaries of the James River, which flows southward through South Dakota and joins the Missouri River near Yankton. The James River basin supports diverse aquatic species and is an important water source for irrigation and livestock. The region's semi-arid climate makes water quality management critical for maintaining ecological balance and agricultural productivity.