Lohmar Wahlscheid Wastewater Treatment Plant, Lohmar, Germany

Lohmar Wahlscheid is a wastewater treatment plant located in the Wahlscheid district of Lohmar, in the Rhein-Sieg-Kreis region of Nordrhein-Westfalen, Germany. The plant serves a population of approximately 9,500 people, classifying it as a small to medium agglomeration under EU regulations. As a German plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The directive also requires appropriate treatment before discharge into inland waters, ensuring compliance with national water quality standards. The treated effluent is discharged into local watercourses that drain into the Agger River, a tributary of the Sieg, which flows into the Rhine. This river system supports diverse aquatic life and is part of the larger Rhine basin, an ecologically significant region in Europe.

The plant's discharge enters local streams that feed into the Agger River, a tributary of the Sieg, which ultimately joins the Rhine River. The Rhine basin is a major European watershed supporting diverse ecosystems, including fish migration routes and riparian habitats. The plant's treatment helps protect downstream water quality in this ecologically sensitive river system.