KA PRIMSWEILER Wastewater Treatment Plant, Schmelz, Saarland, Germany

KA PRIMSWEILER is a municipal wastewater treatment plant located in Schmelz, in the Saarland region of Germany. The plant serves a population of approximately 14,450 people, classifying it as a medium-sized agglomeration under EU regulations. As a German plant, KA PRIMSWEILER operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The treated effluent from KA PRIMSWEILER is discharged into local water bodies that ultimately drain into the Saar River, a tributary of the Moselle, which flows into the Rhine. The Rhine basin is a major European waterway supporting diverse aquatic ecosystems and providing drinking water for millions.

The plant discharges into the local watershed that feeds the Saar River, a tributary of the Moselle River, which joins the Rhine. The Rhine basin is ecologically significant, supporting diverse fish species and serving as a migratory corridor for birds. The region's water quality is managed under the EU Water Framework Directive, aiming for good ecological status.