ARA GAV Wieselburg 1639 SB Wastewater Treatment Plant, Petzenkirchen, Austria

ARA GAV Wieselburg 1639 SB is a municipal wastewater treatment plant located in Petzenkirchen, a town in the Bezirk Melk district of Niederösterreich, Austria. The plant serves a population of approximately 16,912 people, placing it in the medium agglomeration category under EU regulations. As an Austrian facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. The plant is expected to comply with these standards. The treated effluent is discharged into the local watershed, which eventually 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 millions of people. The plant plays a key role in protecting this downstream environment from pollution.

The plant discharges into the local tributaries of the Danube River basin, which flows through Austria and several other countries before reaching the Black Sea. The Danube supports a rich diversity of fish and bird species, including sturgeon and migratory waterfowl. Protecting water quality in this basin is critical for maintaining ecological balance and supporting downstream communities.