ARA Stetten 1110 KO Wastewater Treatment Plant, Stetten, Niederösterreich

ARA Stetten 1110 KO is a municipal wastewater treatment facility located in Stetten, a town in the Bezirk Korneuburg district of Niederösterreich, Austria. The plant serves a population equivalent of 2,242 and is designed to handle a capacity of 2,175 cubic meters per day, with an average daily discharge volume of 442.61 cubic meters. It operates under Austria's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates advanced treatment for sensitive areas. The plant employs advanced treatment processes, ensuring a high level of pollutant removal before discharge. As a facility serving a small agglomeration (under 10,000 population equivalent), it meets the directive's requirements for secondary treatment, with advanced treatment likely targeting nutrient removal to protect receiving waters. The plant's operational status is active, contributing to the region's wastewater management infrastructure. The treated effluent from ARA Stetten 1110 KO is discharged into local watercourses that ultimately drain into the Danube River basin. The Danube is a major European waterway flowing into the Black Sea, supporting diverse aquatic ecosystems. The plant's advanced treatment helps reduce nutrient loads, protecting downstream water quality and biodiversity in the Danube and its delta.

The plant discharges into local streams that feed into the Danube River, which flows through Austria and several other countries before reaching the Black Sea. The Danube basin supports a rich array of aquatic life, including migratory fish species such as sturgeon. Advanced treatment at the plant helps minimize nutrient pollution, which is critical for preventing eutrophication in downstream lakes and coastal waters.