ARA AV Piestingtaler 3030 WB Sollenau - Wastewater Treatment Plant in Sollenau, Austria

ARA AV Piestingtaler 3030 WB Sollenau is a wastewater treatment plant located in Sollenau, in the state of Niederösterreich, Austria. The plant serves a population of approximately 43,932, classifying it as a medium-sized agglomeration under EU regulations. It is situated in the Piesting river valley, part of the Danube basin. As an Austrian plant serving over 10,000 population equivalents, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment as a minimum. For agglomerations of this size in sensitive areas, more stringent treatment may be mandated. The regulatory framework ensures compliance with national and EU standards. The plant discharges into the Piesting River, a tributary of the Fischa River, which flows into the Danube. The Danube ultimately drains into the Black Sea. The local watershed supports diverse aquatic life and is part of a larger ecological network. The plant plays a key role in protecting water quality in the region.

The plant discharges into the Piesting River, which flows into the Fischa River and then the Danube River, eventually reaching the Black Sea. The watershed supports diverse aquatic habitats and is important for migratory fish species. The region is characterized by agricultural and urban land use, making effective wastewater treatment critical for maintaining water quality.