Aspach Wastewater Treatment Plant, St. Veit im Innkreis, Oberösterreich

Aspach is a wastewater treatment plant located in the municipality of St. Veit im Innkreis, in the Bezirk Braunau district of Oberösterreich, Austria. It serves a population of approximately 5,924 people, placing it in the small-to-medium agglomeration category under Austrian and EU regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 9,500 m³/day and a discharge volume of 948.29 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variability. The treated effluent is discharged into local watercourses that ultimately drain into the Inn River, a major tributary of the Danube. The Danube basin is a critical ecological corridor in Central Europe, supporting diverse aquatic life and providing water resources for millions. The plant's advanced treatment helps protect downstream water quality in this sensitive river system.

The plant discharges into local streams that flow into the Inn River, which joins the Danube near Passau. The Danube is one of Europe's most important rivers, supporting a wide range of fish species and migratory birds. The advanced treatment at Aspach reduces nutrient loads and pollutants, helping to maintain the ecological health of the Inn-Danube system, which is subject to EU Water Framework Directive requirements for good ecological status.