Oberwolz Wastewater Treatment Plant, Oberwölz, Styria, Austria

The Oberwolz wastewater treatment plant is located in Oberwölz, a town in the Bezirk Murau district of Styria, Austria. Serving a population of 2,369, this facility is part of the municipal infrastructure for the region. The plant operates with advanced treatment processes, ensuring high-quality effluent before discharge. With a designed capacity of 2,800 cubic meters per day and an average daily discharge volume of 358.18 cubic meters, the plant operates well below its capacity. As an Austrian facility, it adheres to the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates appropriate treatment levels based on population equivalents and receiving water sensitivity. The treated effluent is discharged into local waterways that drain into the Mur River system, ultimately flowing into the Danube River and the Black Sea. The plant plays a key role in protecting the water quality of these downstream environments, supporting aquatic life and regional ecological health.

The Oberwolz plant discharges into the Wölzerbach stream, a tributary of the Mur River. The Mur flows through Styria and into Slovenia, joining the Drava and eventually the Danube, which empties into the Black Sea. This watershed supports diverse aquatic habitats and is important for regional biodiversity. The advanced treatment helps minimize nutrient and pollutant loads, protecting downstream ecosystems.