SKA Hohenstein Oberstetten Wastewater Treatment Plant, Oberstetten, Germany

SKA Hohenstein Oberstetten is a wastewater treatment plant located in Oberstetten, a district of Hohenstein in the Reutlingen district of Baden-Württemberg, Germany. The plant serves a population of approximately 3,100 and has a designed capacity of 4,500 m³ per day, with an average discharge volume of 713.6 m³ per day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. As a German facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for sensitive areas and agglomerations of this scale. The treated effluent is discharged into local water bodies that ultimately drain into the Danube River basin, contributing to the protection of the Black Sea ecosystem. The plant's advanced treatment helps safeguard downstream aquatic habitats and supports regional water quality goals.

The plant discharges into local streams that are part of the Danube River basin, which flows through Central and Eastern Europe before reaching the Black Sea. The region's karst topography and sensitive freshwater ecosystems require advanced treatment to prevent nutrient enrichment and protect biodiversity. The plant's location inland, away from coastal areas, reduces direct marine impact but still plays a role in the overall health of the Danube watershed.