ARA Waidhofen ad Ybbs 380 WY Wastewater Treatment Plant, Waidhofen an der Ybbs, Austria

ARA Waidhofen ad Ybbs 380 WY is a municipal wastewater treatment plant located in Waidhofen an der Ybbs, a town in the state of Niederösterreich, Austria. The plant serves a population of approximately 8,583 people, classifying it as a small to medium agglomeration under EU standards. 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 directive also mandates more stringent treatment if the receiving waters are designated as sensitive areas. The plant's treatment processes and capacity are designed to meet these regulatory requirements, ensuring compliance with national and EU standards. The plant discharges treated wastewater into the local water system, which ultimately drains into the Ybbs River, a tributary of the Danube. The Danube River basin is a major European watershed, supporting diverse aquatic ecosystems and providing water for millions of people. The plant's operations help protect the water quality of the Ybbs and Danube rivers, contributing to the ecological health of the region.

The plant's treated effluent flows into the Ybbs River, which joins the Danube River near Ybbs an der Donau. The Danube is the second-longest river in Europe, flowing into the Black Sea. The watershed supports a variety of aquatic life, including fish species such as Danube salmon and sturgeon. The plant's discharge must meet strict quality standards to protect this ecologically important river system.