Herten Westerholt Wastewater Treatment Plant, Herten, Germany

Herten Westerholt is a municipal wastewater treatment plant located in Herten, within the state of Nordrhein-Westfalen, Germany. The facility serves a population of approximately 37,029, placing it in the medium agglomeration category under EU regulations. The plant is situated in the industrial Ruhr region, an area with a dense population and extensive historical mining and industrial activity. As a German plant serving over 10,000 people, Herten Westerholt is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary biological treatment as a minimum standard. For agglomerations between 10,000 and 150,000 population equivalent, the directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant's specific treatment processes and capacity details are not publicly available, but the regulatory framework ensures compliance with national and EU standards. The treated effluent from Herten Westerholt is discharged into local watercourses that ultimately drain into the Rhine River basin. The Rhine is one of Europe's major rivers, flowing through Germany and the Netherlands before reaching the North Sea. The plant plays a key role in protecting the water quality of the Rhine catchment, which supports diverse aquatic life and serves as a vital water resource for millions of people.

Herten Westerholt discharges into the Emscher river system, a tributary of the Rhine. The Emscher flows through the Ruhr region and joins the Rhine near Dinslaken, which then empties into the North Sea. The Rhine basin is ecologically significant, supporting migratory fish species such as salmon and eel, and providing habitat for diverse aquatic organisms. The plant's operations help maintain water quality in this heavily industrialized and urbanized watershed.