ARA AWV Oberes Perschlingtal 2454 PL Wastewater Treatment Plant, Untergrafendorf, Austria

ARA AWV Oberes Perschlingtal 2454 PL is a municipal wastewater treatment plant located in Untergrafendorf, a village in the district of St. Pölten, Niederösterreich, Austria. The plant serves a population equivalent of approximately 12,562, classifying it as a medium-sized agglomeration under Austrian and EU regulations. As an Austrian plant, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size. The plant is part of the Abwasserverband (AWV) Oberes Perschlingtal, a wastewater association managing treatment in the upper Perschling valley. The plant likely employs biological treatment to meet Austrian effluent standards. The treated effluent is discharged into the Perschling river, a tributary of the Traisen, which flows into the Danube River. The Danube ultimately drains into the Black Sea. The plant plays a key role in protecting the local aquatic ecosystem and downstream water quality in the Danube basin.

The plant discharges into the Perschling river, a small river in the Traisen catchment, which flows into the Danube River. The Danube is a major European waterway that drains into the Black Sea. The local watershed supports diverse aquatic life and is part of a region with agricultural and forested areas. The plant's treatment helps maintain water quality in the Perschling and downstream ecosystems, including the Danube, which is ecologically sensitive due to its role as a migratory corridor for fish and other species.