Isselburg Wastewater Treatment Plant, Anholt, Nordrhein-Westfalen, Germany

The Isselburg wastewater treatment plant is located in Anholt, a district of Isselburg in the state of Nordrhein-Westfalen, Germany. The plant serves a population of approximately 13,431 people, classifying it as a medium-sized agglomeration under European Union regulations. As a German facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. The regulatory framework ensures appropriate treatment standards are met. The treated effluent is discharged into local watercourses that are part of the Rhine River basin. The Rhine is a major European river that flows through Germany and the Netherlands before reaching the North Sea. The plant's operations contribute to protecting the water quality of the Rhine and its tributaries, supporting aquatic ecosystems and downstream communities.

The Isselburg plant discharges into the Issel River, a tributary of the Rhine. The Rhine basin is one of Europe's most important river systems, supporting diverse aquatic life and providing drinking water for millions. The plant's location inland, over 50 km from the coast, means its effluent affects freshwater ecosystems before reaching the North Sea. The region is characterized by agricultural land use and small urban centers, making nutrient removal important for preventing eutrophication in downstream waters.