Leiblfing Wastewater Treatment Plant, Obersunzing, Bavaria, Germany

Leiblfing wastewater treatment plant is located in the hamlet of Straßmühle near Obersunzing, part of the municipality of Leiblfing in Bavaria, Germany. The plant serves a population of approximately 2,521 residents and operates with a designed capacity of 3,000 cubic meters per day. The plant provides secondary treatment, which is the standard biological treatment required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive mandates secondary treatment for all discharges from agglomerations with a population equivalent above 2,000, ensuring removal of organic matter and suspended solids. The treated effluent is discharged into local watercourses that ultimately drain into the Danube River basin. The Danube flows through several countries before reaching the Black Sea, making the plant's operations part of a transboundary water management framework. The surrounding region is characterized by agricultural land and small settlements, and the plant helps protect local streams and groundwater quality.

The plant discharges into small streams that feed into the Danube River basin, which flows through Germany, Austria, and several other countries before reaching the Black Sea. The local watershed supports agricultural activities and provides habitat for aquatic species. The Danube is a major European waterway, and maintaining water quality in its tributaries is essential for downstream ecosystems and human use.