KA OTTWEILER Wastewater Treatment Plant, Ottweiler, Saarland, Germany

KA OTTWEILER is a municipal wastewater treatment plant located in Ottweiler, in the state of Saarland, Germany. The plant serves a population of approximately 12,700 people, classifying it as a medium agglomeration under EU regulations. It is situated inland, away from coastal areas, and discharges into local watercourses that ultimately drain into the Rhine basin. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment as a minimum. In sensitive areas, such as those designated under the directive, more stringent treatment may be required. The plant's operational context is governed by German federal and state water laws, which implement the directive and set discharge standards for nutrients and other pollutants. The treated effluent from KA OTTWEILER is discharged into the local watershed, which feeds into the Blies River, a tributary of the Saar River. The Saar flows into the Moselle, which joins the Rhine, a major European waterway. The Rhine basin supports diverse aquatic ecosystems and is a critical water resource for the region. The plant plays a key role in protecting water quality in this transboundary river system.

KA OTTWEILER discharges into the local watershed that flows into the Blies River, a tributary of the Saar River. The Saar joins the Moselle, which ultimately drains into the Rhine River. The Rhine basin is a major European waterway supporting diverse aquatic life and providing drinking water for millions. The plant's treatment helps protect downstream ecosystems, including fish habitats and migratory corridors, from nutrient pollution and organic loads.