oebelbach Wastewater Treatment Plant, Übelbach, Steiermark, Austria

The oebelbach wastewater treatment plant is located in Übelbach, a municipality in the district of Graz-Umgebung, Steiermark, Austria. The plant serves a population of approximately 1,920 residents, making it a small-scale facility within the Austrian wastewater infrastructure. It is situated in a rural, inland area, away from coastal influences. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 3,000 cubic meters per day and an average discharge volume of 526.48 cubic meters per day, the facility operates well within its capacity, ensuring effective treatment of municipal wastewater. The treated effluent is discharged into the local receiving water body, which ultimately drains into the Mur River basin. The Mur River flows through Steiermark and into Slovenia, Croatia, and Hungary before reaching the Danube River and the Black Sea. The plant's advanced treatment helps protect the ecological health of these downstream waters, supporting aquatic life and water quality in the region.

The oebelbach plant discharges into a small watercourse that is part of the Mur River basin. The Mur River flows through the Alpine foothills and into the Pannonian Basin, supporting diverse aquatic ecosystems. Downstream, the river passes through several countries, ultimately reaching the Danube and the Black Sea. The plant's advanced treatment reduces nutrient loads, helping to prevent eutrophication in sensitive downstream waters and maintaining the ecological balance of the watershed.