Muhlhausen Wastewater Treatment Plant, Weihersdorf, Bayern, Germany

The Muhlhausen wastewater treatment plant is located in Weihersdorf, a district of Mühlhausen in the Landkreis Neumarkt in der Oberpfalz, Bayern, Germany. The facility serves a population of approximately 7,117 and operates with advanced treatment processes, ensuring high-quality effluent standards. As an advanced treatment plant, Muhlhausen goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants in sensitive catchment areas under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant's designed capacity of 6,700 m³/day and current discharge volume of 765.49 m³/day indicate it operates well below its maximum capacity, allowing for future growth or seasonal variations. The treated effluent is discharged into local waterways that ultimately drain into the Danube River basin, contributing to the Black Sea catchment. The plant plays a key role in protecting the region's water quality, supporting aquatic life and downstream ecosystems in the Bavarian landscape.

The Muhlhausen plant discharges into small streams that feed into the Sulz and then the Altmühl River, a tributary of the Danube. The Danube flows through multiple countries before reaching the Black Sea. The region's aquatic ecosystems support diverse species, including fish and macroinvertebrates, and the plant's advanced treatment helps maintain ecological balance in this sensitive watershed.