ARA Vosendorf 197 MD Wastewater Treatment Plant, Vösendorf, Niederösterreich

ARA Vosendorf 197 MD is a municipal wastewater treatment plant located in Vösendorf, a town in the Mödling district of Niederösterreich, Austria. The plant serves a population equivalent of approximately 16,200, placing it in the medium agglomeration category under EU classification. As a plant of this scale in Austria, it is expected to provide at least secondary treatment in accordance with the EU Urban Waste Water Treatment Directive (91/271/EEC). The directive requires secondary treatment for agglomerations with a population equivalent above 2,000, and more stringent treatment for discharges into sensitive areas. The regulatory framework ensures compliance with national standards. The treated effluent is discharged into the local water system, which ultimately drains into the Danube River basin. The Danube is a major European waterway that flows into the Black Sea, supporting diverse aquatic ecosystems and providing water for agriculture, industry, and recreation. The plant plays a key role in protecting downstream water quality in this ecologically significant basin.

The plant discharges into the Danube River basin, which flows through multiple countries before reaching the Black Sea. The Danube supports a wide range of aquatic life, including several fish species and migratory birds. The plant's location in the Vienna metropolitan area means its effluent contributes to the overall water quality of the Danube, which is a vital resource for drinking water, agriculture, and tourism in the region.