VKA Untere Radolfzeller Aach_Moos Wastewater Treatment Plant, Gaienhofen, Baden-Württemberg

VKA Untere Radolfzeller Aach_Moos is a municipal wastewater treatment plant located in Gaienhofen, a municipality in the district of Konstanz, Baden-Württemberg, Germany. The plant serves a population equivalent of approximately 20,750, placing it in the medium agglomeration category under EU classification. As a German plant, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The plant's designed capacity is 1.00 (likely in thousand cubic meters per day or similar units), and it is situated inland but within 50 km of the coast. The treated effluent is discharged into the local water system, which ultimately drains into the Rhine River basin and then into the North Sea. The plant plays a key role in protecting the water quality of the region's rivers and downstream ecosystems, including Lake Constance (Bodensee) and the Rhine.

The plant discharges into the Aach-Moos water system, which feeds into the Radolfzeller Aach river, a tributary of the Rhine. The Rhine flows into the North Sea, supporting diverse aquatic life and serving as a critical migratory corridor for fish. The region is ecologically sensitive due to its proximity to Lake Constance, a major freshwater resource. The plant's treatment helps prevent nutrient pollution that could cause eutrophication in downstream waters.