Indianola WWTP - Secondary Wastewater Treatment Plant in Indianola, Nebraska

Indianola WWTP is a municipal wastewater treatment plant located in Indianola, Nebraska, United States. The facility serves a small population of approximately 1,008 residents, reflecting the rural character of the area. It is situated in Red Willow County, near the Republican River basin. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater facilities. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 454.25 m³/day and currently discharges 378.54 m³/day, indicating it operates below its full capacity. Treated effluent from the plant is discharged into local waterways that ultimately drain into the Republican River, a tributary of the Kansas River system. This river network supports agricultural irrigation and provides habitat for aquatic species. The plant's operations are regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, ensuring compliance with water quality standards.

The plant discharges into the Republican River watershed, which flows through Nebraska and Kansas before joining the Kansas River and eventually the Missouri River. This basin supports diverse aquatic life and is important for regional agriculture. The plant's secondary treatment helps protect downstream water quality by reducing pollutants that could affect fish populations and recreational uses.