Weihmichl OT Unterneuhausen Wastewater Treatment Plant, Bavaria, Germany

The Weihmichl OT Unterneuhausen wastewater treatment plant is located in the small community of Unterneuhausen, part of the Weihmichl municipality in the Landshut district of Bavaria, Germany. It serves a population of approximately 1,348 residents, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant provides secondary treatment, which is the minimum standard required by the EU UWWTD for freshwater discharges from agglomerations of this size. With a designed capacity of 1,700 m³/day and an average daily discharge of 341.15 m³/day, the facility operates well below its capacity, indicating adequate headroom for current demand. The treated effluent is discharged into local watercourses that ultimately drain into the Danube River basin, contributing to the Black Sea watershed. The plant's operation helps protect the region's aquatic ecosystems and groundwater quality, supporting agricultural and ecological health in the Bavarian lowlands.

The plant discharges into the Danube River basin, which flows through Central and Eastern Europe before reaching the Black Sea. The local watershed includes small streams and agricultural drainage channels that feed into the Isar River, a major Danube tributary. This region supports diverse aquatic life and is part of a broader ecological network that includes wetlands and floodplains important for migratory birds and fish species.