Schladming Wastewater Treatment Plant, Haus im Ennstal, Steiermark

The Schladming wastewater treatment plant is located in Haus im Ennstal, a municipality in the Steiermark region of Austria. Serving a population equivalent of 14,575, the plant is part of the region's municipal wastewater infrastructure, handling domestic sewage from the local community. As a plant serving a medium-sized agglomeration, it falls under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for discharges into freshwater. Austrian regulations implement this directive through national legislation, ensuring compliance with European standards for water quality. The treated effluent is discharged into the Enns River, a major tributary of the Danube, which flows into the Black Sea. The plant plays a key role in protecting the Enns River ecosystem and downstream water quality in the Danube basin.

The plant discharges into the Enns River, which flows into the Danube and ultimately the Black Sea. The Enns River supports diverse aquatic life and is an important corridor for migratory fish species. Protecting water quality in this alpine river is critical for maintaining ecological balance in the Danube watershed.