Overview
ARA Saalachtal Unken is a wastewater treatment plant serving approximately 7,000 people in Schneizlreuth, Bavaria, Austria. It discharges into the Saalach River, a tributary of the Salzach, which flows into the Inn and ultimately the Danube.
ARA Saalachtal Unken is a municipal wastewater treatment plant located in Schneizlreuth, Bavaria, near the Austrian border. The plant serves a population equivalent of about 6,960, placing it in the small to medium agglomeration category under the EU Urban Waste Water Treatment Directive (UWWTD). As an Austrian plant operating under EU regulations, ARA Saalachtal Unken is required to provide at least secondary treatment, which is the standard for agglomerations of this size. The EU UWWTD mandates secondary treatment for all discharges from agglomerations above 2,000 population equivalent, ensuring effective removal of organic matter and suspended solids. The treated effluent from ARA Saalachtal Unken is discharged into the Saalach River, which flows north through the Bavarian Alps. The Saalach joins the Salzach River near Freilassing, and the Salzach eventually meets the Inn River, a major tributary of the Danube. This watercourse supports diverse aquatic life and is part of the Danube River Basin, one of Europe's most significant ecological corridors.
Environmental context
The plant's discharge enters the Saalach River, a fast-flowing alpine river that drains the northern limestone Alps. The Saalach flows into the Salzach, which then joins the Inn River, a major Danube tributary. The downstream environment includes ecologically sensitive floodplain habitats and supports species such as the Danube salmon (Hucho hucho). The region's karst geology means groundwater protection is critical, and the plant's treatment standards help maintain water quality in this transboundary river system.
Frequently asked questions
ARA Saalachtal Unken is located in Schneizlreuth, in the district of Berchtesgadener Land, Bavaria, Germany, near the Austrian border. The plant's address is Dachsweg, Melleck, Schneizlreuth.
The plant serves a population equivalent of approximately 6,960 people, classifying it as a small to medium agglomeration under EU wastewater directives.
The treated effluent is discharged into the Saalach River, a tributary of the Salzach River, which flows into the Inn and eventually the Danube River.
Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent above 2,000 must provide at least secondary treatment. This ensures removal of organic matter and suspended solids before discharge.
The Saalach River is an alpine river that supports diverse aquatic life, including fish species like brown trout and grayling. It is part of the Danube River Basin, a major European ecological corridor, and its water quality is important for downstream habitats.
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