Steinfurt Wastewater Treatment Plant, Stolberg, Germany

The Steinfurt wastewater treatment plant is located in Stolberg, within the Städteregion Aachen district of Nordrhein-Westfalen, Germany. Serving a population equivalent of 75,351, it is classified as a medium-to-large agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant is situated inland, approximately 50 km from the coast, and its operations are integrated into the regional water management infrastructure of the Rur river basin. As a German facility, the plant is subject to the EU Urban Waste Water Treatment Directive, which requires secondary treatment (biological treatment) for agglomerations with a population equivalent above 2,000. For larger agglomerations like Steinfurt, the directive may also mandate tertiary treatment if the receiving waters are designated as sensitive areas. The plant's treatment processes are designed to meet stringent German effluent standards, which are enforced by the state environmental agency of Nordrhein-Westfalen. The treated wastewater from the plant is discharged into the local water system, which ultimately drains into the Rur River, a tributary of the Meuse. The Meuse flows through the Netherlands before reaching the North Sea. The plant plays a crucial role in protecting the water quality of the Rur and Meuse basins, supporting aquatic ecosystems and downstream water uses such as drinking water production and recreation.

The plant discharges into the Rur River basin, which flows into the Meuse River and eventually the North Sea. This watershed supports diverse aquatic life, including fish species such as grayling and brown trout, and is an important ecological corridor in the region. The plant's operations help maintain water quality standards in a basin that faces pressures from industrial activity and urban runoff.