ARA AV An der Traisen 2550 PL Wastewater Treatment Plant, Traismauer, Austria

ARA AV An der Traisen 2550 PL is a wastewater treatment plant located in Traismauer, Niederösterreich, Austria. The facility serves a population of approximately 171,371 people, classifying it as a large agglomeration under EU regulations. The plant is situated near the Traisen River, a tributary of the Danube, and plays a key role in protecting the region's water quality. As a large agglomeration in Austria, the plant is required to meet stringent treatment standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). This directive mandates secondary treatment as a minimum, with tertiary treatment required for sensitive areas. The plant's capacity and treatment processes are designed to comply with these regulations, ensuring effective removal of pollutants before discharge. The treated effluent is discharged into the Traisen River, which flows into the Danube River and eventually reaches the Black Sea. The plant's operations help maintain the ecological health of the Traisen and Danube watersheds, supporting aquatic life and downstream water quality. Its location in a densely populated area underscores the importance of reliable wastewater management for public health and environmental protection.

The plant discharges into the Traisen River, a tributary of the Danube River, which ultimately drains into the Black Sea. The Traisen River supports diverse aquatic ecosystems and is part of a larger watershed that includes ecologically sensitive floodplain areas. The plant's treatment helps reduce nutrient and pollutant loads, protecting downstream habitats and water quality in the Danube basin.