Schwindegg Wastewater Treatment Plant, Wörth, Bavaria

The Schwindegg wastewater treatment plant is located in the town of Wörth, within the Schwindegg municipality in the district of Mühldorf am Inn, Bavaria, Germany. The plant serves a population of approximately 3,400 people, 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 design capacity of 4,875 m³/day and an average daily discharge volume of 685 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 ultimately drain into the Inn River, a major tributary of the Danube. The Danube then flows into the Black Sea. The plant plays a key role in protecting the local watershed and downstream aquatic ecosystems from nutrient pollution and organic load.

The plant discharges into small streams that feed into the Inn River, which joins the Danube near Passau. The Danube is one of Europe's most important rivers, supporting diverse aquatic life and providing water for millions. The Inn-Danube system is ecologically sensitive, with habitats for fish species such as Danube salmon and various migratory birds. Effective wastewater treatment here helps reduce nutrient loading and protects downstream water quality in the Danube basin and ultimately the Black Sea.