Hartberg Wastewater Treatment Plant, Hartberg, Styria, Austria

The Hartberg wastewater treatment plant is located in the city of Hartberg, in the state of Styria, Austria. It serves a population of around 81,329, classifying it as a medium to large agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated on Safenauer Straße in the Safenau area, within the Bezirk Hartberg-Fürstenfeld district. As an Austrian facility, the plant operates under the EU UWWTD (91/271/EEC), which requires secondary treatment for agglomerations of this size. For plants serving between 10,000 and 150,000 population equivalent, secondary treatment is standard, with tertiary treatment required if the receiving waters are designated as sensitive areas. It is expected to meet these regulatory standards. The treated effluent from the Hartberg plant is discharged into local watercourses that eventually drain into the Danube River basin, which flows into the Black Sea. The plant plays a crucial role in protecting the local watershed and downstream aquatic ecosystems from nutrient pollution and organic load, supporting water quality in the region's rivers and streams.

The Hartberg plant discharges into the local tributaries of the Danube River basin, which ultimately flows into the Black Sea. The watershed supports diverse aquatic life and is an important ecological corridor in the region. The plant's treatment helps reduce nutrient loading and organic pollution, protecting downstream water quality and aquatic habitats.