St. Ruprecht an der Raab Wastewater Treatment Plant, Dietmannsdorf, Styria

St. Ruprecht an der Raab wastewater treatment plant is located in Dietmannsdorf, a locality in the municipality of Sankt Ruprecht an der Raab, in the district of Weiz, Styria, Austria. The plant serves a population of 2,642 and operates with advanced treatment processes, ensuring high-quality effluent before discharge. The plant has a designed capacity of 3,800 cubic meters per day and currently treats an average daily flow of 708 cubic meters, indicating significant spare capacity. As an Austrian facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size, but the plant exceeds requirements with advanced treatment. The treated effluent is discharged into the local water system, ultimately draining into the Raab River, which flows through Styria and into Hungary, joining the Rába River and eventually the Danube. The plant plays a key role in protecting the Raab River and downstream aquatic ecosystems from nutrient pollution.

The plant discharges into the Raab River basin, which flows eastward through Austria and Hungary, joining the Rába River and eventually the Danube River before reaching the Black Sea. The Raab River supports diverse aquatic life and is used for recreation and irrigation. Advanced treatment at this plant helps reduce nutrient loads, protecting downstream water quality and preventing eutrophication in sensitive areas.