Mohnesee Vollinghausen Wastewater Treatment Plant, Völlinghausen, Germany

Mohnesee Vollinghausen is a wastewater treatment plant located in the village of Völlinghausen, within the municipality of Möhnesee in the district of Soest, Nordrhein-Westfalen, Germany. The plant serves a population of around 9,228, classifying it as a small to medium agglomeration under EU regulations. As a German facility, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size discharging into freshwater. The plant likely employs biological treatment processes to meet national effluent standards set by the Wasserhaushaltsgesetz (WHG) and the Abwasserverordnung (AbwV). The treated effluent is discharged into local water bodies that eventually drain into the Möhne River, a tributary of the Ruhr River, which flows into the Rhine and ultimately the North Sea. The plant plays a key role in protecting the water quality of the Möhne Reservoir and downstream aquatic ecosystems.

The plant discharges into the Möhne River system, which feeds the Möhne Reservoir, an important water body for recreation and drinking water supply. The Möhne flows into the Ruhr, a major tributary of the Rhine, which drains into the North Sea. The region supports diverse aquatic life, including fish species such as grayling and brown trout, and the plant's treatment helps maintain ecological balance in this sensitive watershed.