Gummersbach Krummenohl Wastewater Treatment Plant, Gummersbach, Germany

The Gummersbach Krummenohl wastewater treatment plant is located in Gummersbach, a town in the Oberbergischer Kreis district of Nordrhein-Westfalen, Germany. The plant serves a population of around 29,342, classifying it as a medium-sized agglomeration under EU regulations. Its location inland, away from coastal areas, shapes its discharge and environmental management approach. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent between 10,000 and 150,000 are required to have secondary treatment as a minimum. For larger agglomerations or those discharging into sensitive areas, more advanced treatment may be mandated. It is expected to comply with these EU standards. The plant discharges treated wastewater into local watercourses that ultimately drain into the Rhine River basin. The Rhine is a major European river that flows through Germany and the Netherlands into the North Sea. The plant's operations contribute to protecting the water quality of the Rhine and its tributaries, supporting aquatic life and downstream ecosystems.

The Gummersbach Krummenohl plant discharges into local streams that are part of the Agger River watershed, a tributary of the Sieg River, which flows into the Rhine. The Rhine basin is ecologically significant, supporting diverse fish species and serving as a migratory corridor for birds. The plant's treatment helps maintain water quality in this important river system, which ultimately drains into the North Sea.