Overview
Steyr und Umgebung is a municipal wastewater treatment plant in Steyr, Oberösterreich, Austria, serving approximately 101,000 people. It operates under the EU Urban Waste Water Treatment Directive.
Steyr und Umgebung is a municipal wastewater treatment plant located in Steyr, Oberösterreich, Austria. The facility serves a population of approximately 101,000, classifying it as a large agglomeration under EU regulations. The plant is situated in the industrial and urban region of Upper Austria, near the confluence of the Steyr and Enns rivers. As a large agglomeration, the plant is expected to provide at least secondary treatment under the EU Urban Waste Water Treatment Directive (91/271/EEC). For sensitive areas, tertiary treatment may be required to reduce nutrient loads. The regulatory framework ensures compliance with discharge standards. The treated effluent is discharged into the Enns River, a tributary of the Danube, which flows into the Black Sea. The plant plays a key role in protecting the water quality of the Enns and Danube watersheds, supporting aquatic ecosystems and downstream communities.
Environmental context
The plant discharges into the Enns River, which flows into the Danube River and ultimately the Black Sea. The Enns River supports diverse aquatic life and is an important corridor for migratory fish species. The plant's nutrient removal helps prevent eutrophication in the Danube and Black Sea, which are sensitive to nitrogen and phosphorus pollution.
Frequently asked questions
Steyr und Umgebung is located in Steyr, Oberösterreich, Austria, at Kematmüllerstraße 1, near the confluence of the Steyr and Enns rivers.
The plant serves approximately 101,035 people, classifying it as a large agglomeration under the EU Urban Waste Water Treatment Directive.
Treated wastewater from the plant is discharged into the Enns River, a tributary of the Danube, which flows into the Black Sea.
As a large agglomeration (>100,000 population equivalent), the plant is required to provide at least secondary treatment under the EU Urban Waste Water Treatment Directive (91/271/EEC). If the receiving water is a sensitive area, tertiary treatment for nutrient removal may be mandated.
In Austria, plants serving around 100,000 people typically employ secondary biological treatment with nutrient removal (nitrogen and phosphorus) to meet EU standards. Many also include tertiary filtration or disinfection to protect sensitive receiving waters.
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