SKA Kussaberg Wastewater Treatment Plant, Kadelburg, Switzerland

SKA Kussaberg is a wastewater treatment plant located in Kadelburg, within the municipality of Küssaberg in the canton of Baden-Württemberg, Switzerland. The plant serves a population equivalent of 8,800, placing it in the medium-agglomeration category under European Union classification. As a Swiss plant, SKA Kussaberg operates under the Swiss Water Protection Act (Gewässerschutzgesetz), which aligns with the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive requires secondary treatment as a minimum, with tertiary treatment in sensitive areas. Regulatory compliance ensures appropriate treatment standards. The treated effluent from SKA Kussaberg is discharged into the local watershed, which ultimately drains into the Rhine River via the High Rhine region. The Rhine is a major European waterway supporting diverse aquatic ecosystems and providing drinking water for millions. The plant's location inland, over 50 km from the coast, reduces direct marine impact, but its discharge contributes to the overall water quality of the Rhine basin.

SKA Kussaberg discharges into the local drainage network that feeds the High Rhine, a section of the Rhine River flowing from Lake Constance to Basel. The Rhine is a critical waterway for biodiversity, supporting species such as Atlantic salmon and European eel. The plant's effluent quality is regulated to protect downstream ecosystems, including the Rhine's floodplain habitats and migratory fish corridors. The watershed ultimately drains into the North Sea via the Rhine-Meuse delta.