Voitsberg Wastewater Treatment Plant, Steiermark, Austria

The Voitsberg wastewater treatment plant is located in the city of Voitsberg, in the state of Steiermark, Austria. It serves a population of approximately 13,500 people, placing it in the medium agglomeration category under EU classification. As an Austrian facility, the plant operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations between 10,000 and 150,000 population equivalents. The plant's discharge is regulated by Austrian water law, which implements the directive's standards for effluent quality and monitoring. The treated wastewater from Voitsberg is discharged into the local water system, which drains into the Mur River basin. The Mur River flows through Steiermark and eventually joins the Drava River, which empties into the Danube River and ultimately the Black Sea. This connection to a major European river system underscores the plant's role in protecting downstream water quality.

The Voitsberg plant discharges into the local watershed that feeds the Mur River, a major tributary of the Drava River. The Mur River supports diverse aquatic life and is an important ecological corridor in the region. The water eventually reaches the Danube River and the Black Sea, making the plant's treatment performance critical for downstream ecosystems.