Pfarrkirchen Wastewater Treatment Plant, Bavaria, Germany

The Pfarrkirchen wastewater treatment plant is located in the town of Pfarrkirchen, in the Landkreis Rottal-Inn district of Bavaria, Germany. The facility serves a population of about 38,749, classifying it as a medium-sized agglomeration under European Union regulations. As a German plant of this scale, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for discharges into freshwater and estuaries. The plant's treatment processes are designed to meet the effluent standards set by the directive, ensuring compliance with national and EU water quality objectives. The treated effluent is discharged into the local watershed, which ultimately drains into the Rott River, a tributary of the Inn River, and then into the Danube River basin. The Danube flows into the Black Sea, making the plant's operations important for downstream water quality across multiple countries. The region's aquatic ecosystems benefit from the plant's adherence to stringent treatment standards.

The plant discharges into the Rott River, a tributary of the Inn River, which flows into the Danube River basin. The Danube ultimately reaches the Black Sea, making this plant part of a transboundary watershed. The local aquatic environment supports diverse fish species and riparian habitats, and the plant's treatment helps maintain water quality in this ecologically sensitive river system.