Pfaffing Wastewater Treatment Plant, Bavaria, Germany

Pfaffing wastewater treatment plant is located in the municipality of Pfaffing in the Landkreis Rosenheim district of Bavaria, Germany. The plant serves a population of approximately 3,683 people, classifying it as a small to medium 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 4,800 m³/day and an average daily discharge of 492.18 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that eventually drain into the Inn River, a major tributary of the Danube. The Danube flows into the Black Sea, making this plant part of a large international river basin. The surrounding region is characterized by agricultural and rural landscapes, and the plant plays a key role in protecting local streams and groundwater from nutrient pollution.

The plant discharges into small streams that feed into the Inn River, which joins the Danube and ultimately reaches the Black Sea. The local watershed supports diverse aquatic life and is important for regional biodiversity. Proper treatment helps prevent eutrophication in downstream water bodies, particularly in the Danube Delta, an ecologically sensitive area.