Bad Kreuzen Wastewater Treatment Plant: Advanced Treatment in Oberösterreich

The Bad Kreuzen wastewater treatment plant is located in Neuaigen, a locality within the municipality of Bad Kreuzen in Oberösterreich, Austria. The facility serves a population of 1,522 and is designed to handle a capacity of 3,000 m³ per day, with an average discharge volume of 352.46 m³/day. As an advanced treatment plant, it goes beyond secondary treatment to remove nutrients and other pollutants, ensuring high-quality effluent. This aligns with the requirements of the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates advanced treatment for sensitive areas. The plant's scale places it in the small agglomeration category under the directive. The treated effluent is discharged into local watercourses that eventually drain into the Danube River basin. The Danube is a major European river that flows into the Black Sea, supporting diverse aquatic ecosystems and providing water for millions of people. The plant's advanced treatment helps protect downstream water quality and ecological health.

The plant discharges into small streams that feed into the Danube River basin. The Danube is the second-longest river in Europe, flowing through multiple countries before reaching the Black Sea. This watershed supports a wide range of aquatic life, including migratory fish species. The advanced treatment at Bad Kreuzen reduces nutrient loads, helping to prevent eutrophication in downstream lakes and coastal areas.