KLA GAGGENAU ROTENFELS AV MURG Wastewater Treatment Plant, Oberndorf, Germany

KLA GAGGENAU ROTENFELS AV MURG is a wastewater treatment plant located in Oberndorf, within the district of Rastatt in Baden-Württemberg, Germany. The plant serves a population of approximately 35,950 people, classifying it as a medium-sized agglomeration under German and EU standards. Its location along the Murg River places it within the Rhine basin, a major European waterway. As a German plant serving over 10,000 population equivalents, it is required to meet secondary treatment standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). For plants in sensitive areas, such as those draining into the Rhine, tertiary treatment for nutrient removal is typically mandated. The regulatory framework ensures a high level of treatment to protect receiving waters. The treated effluent from the plant is discharged into the Murg River, a tributary of the Rhine. The Rhine is one of Europe's most important rivers, flowing through multiple countries before reaching the North Sea. The plant plays a critical role in maintaining water quality in the Murg and Rhine, supporting aquatic ecosystems and downstream uses such as drinking water production and recreation.

The plant discharges into the Murg River, which flows into the Rhine River near Karlsruhe. The Rhine ultimately drains into the North Sea, making this plant part of a transboundary river basin. The Murg and Rhine support diverse aquatic life, including fish species like salmon and eel, and the area is ecologically sensitive due to its role as a migratory corridor. Nutrient removal is critical to prevent eutrophication in the North Sea.