StKathrein am Offenegg Wastewater Treatment Plant - Styria, Austria

The StKathrein am Offenegg wastewater treatment plant is located in the municipality of St. Kathrein am Offenegg, within the district of Weiz in the state of Styria, Austria. The plant serves a population of 2,005 and operates with advanced treatment technology, ensuring high-quality effluent standards. As an Austrian plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment for agglomerations of this size. The advanced treatment level indicates that the plant likely employs nutrient removal processes to protect sensitive receiving waters. The plant has a designed capacity of 3,100 cubic meters per day and a current discharge volume of 343.58 cubic meters per day, suggesting ample capacity for future growth. The treated effluent is discharged into the local watershed, which ultimately drains into the Weizbach river and then into the Raab river, a tributary of the Danube. The Danube flows into the Black Sea, making this plant part of a large international river basin. The advanced treatment helps protect downstream aquatic ecosystems and supports water quality in the region.

The plant discharges into the Weizbach river, a tributary of the Raab river, which flows into the Danube and eventually reaches the Black Sea. The watershed supports diverse aquatic life and is important for regional biodiversity. Advanced treatment reduces nutrient loads, helping to prevent eutrophication in downstream water bodies.