Overview
Mettmach wastewater treatment plant in Oberösterreich, Austria, serves 1,732 people with advanced treatment. It discharges 684.89 m³/day and has a designed capacity of 4,000 m³/day.
The Mettmach wastewater treatment plant is located in the municipality of Mettmach, Bezirk Ried, in the state of Oberösterreich, Austria. It serves a population of 1,732, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated inland, away from coastal areas. The facility provides advanced treatment, which goes beyond the secondary treatment standard required by the EU UWWTD for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The plant has a designed capacity of 4,000 m³/day and currently discharges 684.89 m³/day of treated wastewater, indicating significant reserve capacity. The treated effluent is discharged into a local watercourse, which ultimately drains into the Inn River and then the Danube River basin. The Danube is a major European waterway that flows into the Black Sea. The advanced treatment level helps protect the ecological health of these downstream waters, supporting aquatic biodiversity and water quality.
Environmental context
The plant discharges into a small receiving water body that flows into the Inn River, a tributary of the Danube. The Danube River basin is a transboundary ecosystem supporting diverse aquatic life and providing drinking water for millions. The advanced treatment at Mettmach reduces nutrient loads, helping to prevent eutrophication in downstream lakes and the Black Sea.
Frequently asked questions
The Mettmach wastewater treatment plant is located in the municipality of Mettmach, Bezirk Ried, in the state of Oberösterreich, Austria.
The plant serves a population of 1,732, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive.
The plant discharges treated effluent into a local watercourse that flows into the Inn River, part of the Danube River basin, ultimately reaching the Black Sea.
The plant provides advanced treatment, which includes nutrient removal beyond the secondary treatment standard required by the EU UWWTD for small agglomerations.
Under the EU UWWTD, agglomerations of this size (under 2,000 population equivalent) require appropriate treatment. Mettmach exceeds this with advanced treatment, likely due to the sensitivity of the receiving water body.
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