ARA GAV Wolkersdorf Pillichsdorf Grossengersdorf 2265 MI Wastewater Treatment Plant, Pillichsdorf, Austria

ARA GAV Wolkersdorf Pillichsdorf Grossengersdorf 2265 MI is a wastewater treatment plant located in Pillichsdorf, in the state of Niederösterreich, Austria. The plant serves a population of approximately 21,136 people, placing it in the medium agglomeration category under EU classification. As a plant serving a population between 10,000 and 100,000, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum standard. The regulatory framework ensures appropriate treatment for the community it serves. The plant discharges treated wastewater into local water bodies that ultimately drain into the Danube River basin, a major European watershed. The Danube flows through multiple countries before reaching the Black Sea, making the plant's operations important for downstream water quality and ecosystem health.

The plant's treated effluent enters local streams that feed into the Danube River basin, one of Europe's most significant river systems. The Danube supports diverse aquatic life and provides water for millions of people. Downstream, the river flows through the Danube Delta, an ecologically sensitive area that serves as a critical habitat for numerous bird species and fish. Proper wastewater treatment at this plant helps protect the water quality of the Danube and its tributaries.