Dorsten Wastewater Treatment Plant: Serving 101,000 People in Nordrhein-Westfalen

The Dorsten wastewater treatment plant is located in the city of Dorsten, in the district of Recklinghausen, Nordrhein-Westfalen, Germany. It serves a population of approximately 101,052, classifying it as a large agglomeration under EU regulations. The plant is situated inland, more than 50 km from the coast, and its treated effluent is discharged into local water bodies that ultimately drain into the Rhine River basin. As a German facility serving over 100,000 people, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum, and tertiary treatment if the receiving waters are sensitive. The regulatory framework ensures that appropriate treatment standards are met for this population tier. The plant's receiving water body is not explicitly named, but given its location in the Lippe River catchment (a tributary of the Rhine), treated wastewater likely flows into local streams and then into the Lippe, eventually reaching the Rhine and the North Sea. This downstream chain supports diverse aquatic life and is an important ecological corridor in the region.

The plant discharges into the Lippe River system, a tributary of the Rhine, which flows through the densely populated Ruhr region. The Rhine is a major European waterway supporting diverse fish species and migratory birds. The downstream environment includes the Rhine delta and the North Sea, where nutrient inputs from wastewater can affect coastal ecosystems. The plant's location in an industrial and urban area means its effluent quality is critical for maintaining the ecological health of the Lippe and Rhine rivers.