ARA Poggstall 2511 ME Wastewater Treatment Plant, Pöggstall, Niederösterreich

ARA Poggstall 2511 ME is an advanced wastewater treatment facility located in Pöggstall, a town in the Bezirk Melk district of Niederösterreich, Austria. The plant serves a population of about 7,600, placing it within the small to medium agglomeration category under Austrian and EU regulations. The plant provides advanced treatment, which typically includes biological nutrient removal to reduce nitrogen and phosphorus loads. With a designed capacity of 5,270 m³/day and a discharge volume of 828.70 m³/day, the facility operates well below its capacity, indicating room for future growth. As an Austrian plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations over 2,000 PE and more stringent treatment in sensitive areas. The treated effluent is discharged into local watercourses that drain into the Danube River basin, ultimately reaching the Black Sea. The plant plays a key role in protecting the region's water quality, supporting aquatic ecosystems, and maintaining the ecological health of downstream rivers and the Danube delta.

The plant discharges into small streams in the Pöggstall area, which flow into the Danube River basin. The Danube is a major European waterway that supports diverse aquatic life and provides drinking water for millions. The advanced treatment helps reduce nutrient loads, protecting downstream ecosystems from eutrophication and maintaining water quality in the Danube delta and the Black Sea.