Oskaloosa WWTP - Secondary Treatment Plant in Jefferson County, Kansas

Oskaloosa WWTP is a municipal wastewater treatment plant located in Jefferson County, Kansas, United States. The facility serves a population of approximately 1,093 residents and operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal plants of this scale. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 529.96 million gallons per year and an actual discharge volume of 439.11 million gallons, the plant operates at a moderate utilization rate. As an inland facility, it does not discharge directly to coastal waters. The treated effluent is released into local waterways within the Kansas River basin, which ultimately drains to the Mississippi River and the Gulf of Mexico. The plant's operations contribute to protecting downstream water quality and aquatic ecosystems in this agriculturally dominated region.

The plant discharges into receiving waters within the Kansas River watershed, which flows into the Missouri River and then the Mississippi River before reaching the Gulf of Mexico. This inland location supports diverse aquatic life and is part of a major migratory corridor for birds and fish. The secondary treatment process helps reduce nutrient and pollutant loads to downstream ecosystems.