Allendorf Lumda Wastewater Treatment Plant, Allendorf (Lumda), Hessen

The Allendorf Lumda wastewater treatment plant is located in the town of Allendorf (Lumda) in the Landkreis Gießen district of Hessen, Germany. The facility serves a population of approximately 5,882 people, classifying it as a small to medium agglomeration under German and EU regulations. As a German plant serving fewer than 10,000 people, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment based on the sensitivity of the receiving waters. For smaller agglomerations, secondary treatment is typically mandated unless the discharge is into less sensitive areas, where primary treatment may be acceptable. The plant discharges treated effluent into the Lumda River, a tributary of the Lahn River, which flows into the Rhine River and ultimately reaches the North Sea. The Lumda River supports local aquatic life and is part of the Rhine basin, a major European waterway with significant ecological and economic importance.

The treated effluent from Allendorf Lumda enters the Lumda River, a small stream that flows into the Lahn River, a tributary of the Rhine. The Rhine basin is one of Europe's most important river systems, supporting diverse aquatic ecosystems and providing drinking water for millions. The Lumda River itself is a local watercourse that sustains fish populations and riparian habitats. The plant's discharge must comply with German water quality standards to protect these downstream environments.