Riegersburg Wastewater Treatment Plant: Advanced Treatment in Steiermark, Austria

The Riegersburg wastewater treatment plant is located in the town of Riegersburg, in the Bezirk Südoststeiermark, Steiermark, Austria. It serves a population of 1,169 and operates with advanced treatment, ensuring high-quality effluent. The plant has a designed capacity of 2,000 cubic meters per day and currently discharges 186.00 cubic meters per day. As an advanced treatment facility, Riegersburg goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent Austrian and EU standards. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), small agglomerations like Riegersburg (under 2,000 population equivalent) are required to provide appropriate treatment, and advanced treatment aligns with best practices for sensitive areas. The plant's treated effluent is discharged into local watercourses that drain into the Raab River, which flows into the Rába River in Hungary and eventually reaches the Danube River. This contributes to the protection of the Danube basin's water quality and supports downstream ecosystems, including aquatic habitats and biodiversity in the region.

The Riegersburg plant discharges into local streams that are part of the Raab River catchment, which flows into the Rába River and ultimately the Danube River. The Danube basin is a major European watershed supporting diverse aquatic life and migratory fish species. Advanced treatment at this plant helps reduce nutrient loads, protecting downstream water bodies from eutrophication and maintaining ecological balance in the region.