Sundern II Reigern Wastewater Treatment Plant, Arnsberg, Nordrhein-Westfalen

Sundern II Reigern is a wastewater treatment plant located in the Müschede district of Arnsberg, in the Hochsauerlandkreis region of Nordrhein-Westfalen, Germany. The plant serves a population of approximately 28,426, classifying it as a medium agglomeration under EU 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 plant's treatment processes are designed to meet the standards set by the directive, ensuring compliance with national and European water quality regulations. The treated effluent from Sundern II Reigern is discharged into the local watershed, which ultimately drains into the Ruhr River, a major tributary of the Rhine. The Rhine basin supports diverse aquatic life and is an important ecological corridor in Europe. The plant plays a key role in protecting the water quality of this sensitive river system.

The plant discharges into the Ruhr River, which flows into the Rhine, one of Europe's most important waterways. The Rhine basin supports diverse aquatic ecosystems and is a critical migratory corridor for fish species. The plant's operations help maintain water quality in this ecologically sensitive region, which is subject to strict EU water quality standards.