Hurtgenwald Gey Wastewater Treatment Plant, Hürtgenwald, Germany

Hurtgenwald Gey is an advanced wastewater treatment plant located in the Gey district of Hürtgenwald, in the Kreis Düren region of Nordrhein-Westfalen, Germany. The plant serves a population of around 4,100 and has a designed capacity of 4,000 cubic meters per day, with a discharge volume of 780 cubic meters per day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants in sensitive catchment areas under the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this scale (under 10,000 population equivalent), the directive requires appropriate treatment, and Germany often mandates tertiary or advanced treatment to protect water quality. The plant discharges treated effluent into local watercourses that eventually drain into the Rur River, a tributary of the Meuse. The Meuse flows through Belgium and the Netherlands before reaching the North Sea. The advanced treatment helps protect the Rur and Meuse ecosystems from eutrophication and supports aquatic biodiversity.

The plant's treated effluent enters local streams that feed into the Rur River, which flows through the Eifel region and joins the Meuse near Roermond. The Meuse ultimately discharges into the North Sea via the Dutch delta. The Rur and Meuse watersheds support diverse aquatic life, including fish species such as salmon and trout, and are important for regional water supply and recreation. Advanced treatment at this plant helps reduce nutrient loads, preventing algal blooms and maintaining oxygen levels in downstream waters.