Hallstattersee Wastewater Treatment Plant, Bad Goisern am Hallstättersee, Austria

The Hallstattersee wastewater treatment plant is located in Bad Goisern am Hallstättersee, a municipality in the Gmunden district of Oberösterreich, Austria. The plant serves a population of approximately 16,758, placing it in the medium agglomeration category under Austrian and EU regulations. 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 regulatory framework ensures compliance with national standards for effluent quality. The treated effluent is discharged into the Hallstätter See, a lake in the Salzkammergut region, which drains via the Traun River into the Danube and ultimately the Black Sea. The lake is ecologically sensitive, supporting diverse aquatic life and serving as a key recreational and natural resource in the region.

The plant discharges into Hallstätter See, a lake in the Salzkammergut region of Austria. The lake is part of the Traun River catchment, which flows into the Danube and then the Black Sea. The watershed supports diverse aquatic ecosystems, including fish populations and migratory birds, and is an important recreational area. The plant's operations help protect water quality in this sensitive alpine lake environment.