SKA Langwiese Wastewater Treatment Plant, Ravensburg, Baden-Württemberg

SKA Langwiese is a major wastewater treatment facility located near Ravensburg in the state of Baden-Württemberg, Germany. It serves a population equivalent of approximately 194,752, classifying it as a large agglomeration under EU regulations. The plant is situated in the Schussental valley, a region characterized by its proximity to Lake Constance and the Alpine foothills. As a large agglomeration, the plant is required to meet stringent treatment standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive mandates secondary treatment as a minimum, with tertiary treatment required for discharges into sensitive areas. The plant's designed capacity is reported as 1.00 (likely in million cubic meters per year or similar unit), indicating substantial infrastructure to handle the region's wastewater. The treated effluent from SKA Langwiese ultimately drains into the Schussen River, which flows into Lake Constance (Bodensee), one of Europe's largest freshwater lakes. Lake Constance is a critical drinking water reservoir for millions of people and supports diverse aquatic ecosystems. The plant's performance is therefore vital for protecting water quality in this sensitive transboundary watershed.

SKA Langwiese discharges into the Schussen River, a tributary of Lake Constance (Bodensee), which forms part of the Rhine basin. Lake Constance is a major drinking water source for southern Germany, Switzerland, and Austria, and its ecological health is of high regional importance. The lake supports diverse aquatic life, including endemic fish species and migratory birds, and is subject to strict water quality protections under the International Commission for the Protection of Lake Constance (IGKB).