KA DILLINGEN Wastewater Treatment Plant, Rehlingen, Saarland, Germany

KA DILLINGEN is a municipal wastewater treatment plant located in Rehlingen, a district of Rehlingen-Siersburg in the Saarland region of Germany. The plant serves a population of approximately 34,810 people, placing it in the medium agglomeration category under EU classification. As a German facility, KA DILLINGEN 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 plant discharges into sensitive areas, which are common in the Saarland region due to its river systems. The plant's treated effluent is discharged into the local water system, which ultimately drains into the Saar River, a tributary of the Moselle and then the Rhine. This river network supports diverse aquatic life and is an important ecological corridor in western Germany. The plant plays a key role in protecting water quality in this densely populated and industrialized region.

KA DILLINGEN discharges into the local watershed that flows into the Saar River, a major tributary of the Moselle River, which in turn joins the Rhine River before reaching the North Sea. The Saar River basin supports diverse aquatic ecosystems and is used for recreation and drinking water supply. The plant's treatment helps maintain water quality in this ecologically sensitive river system, which is subject to EU water framework directives.