KA Sosa Wastewater Treatment Plant, Eibenstock, Saxony

KA Sosa is a municipal wastewater treatment plant located in the Sosa district of Eibenstock, in the Erzgebirgskreis region of Saxony, Germany. The plant serves a small population of around 1,950 residents, reflecting its role in a rural, upland community in the Ore Mountains. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Its designed capacity is 2,000 cubic meters per day, and it currently treats an average daily flow of 266.55 cubic meters, indicating significant spare capacity. The treated effluent is discharged into local watercourses that drain into the Zwickauer Mulde river system, eventually reaching the Elbe River and the North Sea. The plant's advanced treatment helps protect the sensitive aquatic ecosystems of the Ore Mountains region, which support diverse freshwater species and are important for regional water quality.

KA Sosa discharges into small streams in the upper Zwickauer Mulde catchment, which flows through the Ore Mountains into the Elbe River and ultimately the North Sea. The region's forested watershed supports sensitive aquatic habitats, including populations of brown trout and other cold-water species. Advanced treatment at this plant helps minimize nutrient loading and protect downstream water quality in this ecologically valuable area.