Hartmannsdorf Wastewater Treatment Plant, Oed, Steiermark, Austria

The Hartmannsdorf wastewater treatment plant is located in Oed, a locality in the municipality of Markt Hartmannsdorf, Bezirk Weiz, Steiermark, Austria. The plant serves a population of 4,920 and operates with advanced treatment technology, ensuring high-quality effluent. As an advanced treatment facility, Hartmannsdorf likely employs processes such as nutrient removal or disinfection beyond secondary treatment. Its designed capacity of 4,500 cubic meters per day and current discharge volume of 505.69 cubic meters per day indicate it operates well below capacity, allowing for future growth. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations between 2,000 and 10,000 population equivalent require secondary treatment; Hartmannsdorf exceeds this standard with advanced treatment. The treated effluent is discharged into local watercourses that drain into the Raab River, which flows eastward into Hungary and eventually into the Danube River basin. The plant's advanced treatment helps protect the sensitive aquatic ecosystems of the Raab and Danube watersheds, supporting biodiversity and water quality downstream.

The Hartmannsdorf plant discharges into the Raab River basin, a tributary of the Danube. The Raab flows through the Pannonian lowlands, supporting diverse aquatic life and agricultural water use. Advanced treatment reduces nutrient loads, protecting downstream ecosystems including the Danube Delta, a vital wetland area. The plant's inland location and advanced treatment minimize marine impact.