Sankt Wolfgang Wastewater Treatment Plant, Großschwindau, Bayern

The Sankt Wolfgang wastewater treatment plant is located in Großschwindau, a district of Sankt Wolfgang in the Landkreis Erding, Bayern, Germany. This facility serves a population of approximately 3,150 residents, providing advanced treatment to protect local water quality. As an advanced treatment plant, Sankt Wolfgang goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants in sensitive areas under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant has a designed capacity of 3,800 m³/day and currently discharges 768.56 m³/day, indicating it operates well below its capacity. The treated effluent is discharged into local water bodies that ultimately drain into the Danube River basin. The plant plays a key role in safeguarding the ecological health of the region's streams and rivers, supporting aquatic life and downstream water quality in the Danube watershed.

The plant discharges into local streams that feed into the Isar River, a major tributary of the Danube. The Isar flows through Bavaria and into the Danube, which empties into the Black Sea. This watershed supports diverse aquatic ecosystems, including fish species such as grayling and brown trout. The advanced treatment helps reduce nutrient loading, preventing eutrophication in downstream waters.