KA Schlettau Wastewater Treatment Plant, Schlettau, Saxony, Germany

KA Schlettau is a municipal wastewater treatment plant located in the town of Schlettau, in the Erzgebirgskreis district of Saxony, Germany. The plant serves a population of approximately 3,850 residents, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant provides secondary treatment, which is the minimum standard required by the EU UWWTD for freshwater discharges from agglomerations of this size. With a designed capacity of 4,300 m³/day and an average daily discharge of 588.30 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into a local watercourse that ultimately drains into the Zschopau River, a tributary of the Freiberger Mulde, which flows into the Mulde and then the Elbe River. The Elbe carries the water through Germany to the North Sea. The plant plays a key role in protecting the water quality of these rivers and the downstream ecosystem.

KA Schlettau discharges into a small stream that feeds into the Zschopau River, part of the Elbe River basin. The Elbe flows through Germany to the North Sea, supporting diverse aquatic life and serving as an important migratory corridor for fish. The plant's secondary treatment helps reduce organic pollution and protect the ecological health of the receiving waters, which are subject to the EU Water Framework Directive's goals for good ecological status.