Erkrath Hochdahl Wastewater Treatment Plant - Erkrath, Nordrhein-Westfalen, Germany

The Erkrath Hochdahl wastewater treatment plant is located in Erkrath, Nordrhein-Westfalen, Germany, serving a population of around 31,775. As a medium-sized agglomeration, the plant is part of the region's municipal wastewater infrastructure, treating domestic wastewater from the local community. 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 provide secondary treatment or equivalent. The plant's treatment process meets these regulatory standards, ensuring effective removal of organic matter and nutrients before discharge. The treated effluent is discharged into local water bodies that eventually drain into the Rhine River basin, a major European waterway flowing into the North Sea. The plant plays a key role in protecting the water quality of the Rhine catchment, supporting aquatic ecosystems and downstream water uses.

The plant discharges into the local drainage network that feeds into the Rhine River basin, one of Europe's most important waterways. The Rhine flows through densely populated and industrialized regions before reaching the North Sea. The plant's treatment helps reduce nutrient and pollutant loads, protecting the Rhine's ecological health and supporting biodiversity in its floodplains and delta.