ARA Zentralraum Lungau Wastewater Treatment Plant, Tamsweg, Salzburg

ARA Zentralraum Lungau is a municipal wastewater treatment plant located in Tamsweg, in the state of Salzburg, Austria. The plant serves a population equivalent of around 25,251, placing it in the medium agglomeration category under Austrian and EU regulations. As an Austrian facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. The plant's treatment processes and capacity are designed to meet these regulatory standards. The treated effluent from the plant is discharged into the local water system, which ultimately drains into the Mur River and then the Drava River, part of the Danube basin. This watershed supports diverse aquatic life and is important for regional water quality. The plant plays a key role in protecting the downstream environment from nutrient pollution and organic load.

The plant discharges into the Mur River catchment, which flows into the Drava River and eventually the Danube River before reaching the Black Sea. This watershed supports diverse aquatic ecosystems and is used for recreation and agriculture. The region's alpine terrain and seasonal snowmelt influence flow patterns, making consistent treatment important for maintaining water quality.