Niederranna Hofkirchen Wastewater Treatment Plant, Oberösterreich, Austria

Niederranna Hofkirchen is an advanced wastewater treatment plant located in Niederranna, Hofkirchen im Mühlkreis, in the state of Oberösterreich, Austria. The plant serves a population of 2,454 and is part of the municipal infrastructure for the region. The plant provides advanced treatment, which goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus. With a designed capacity of 5,000 m³/day and a current discharge volume of 571.52 m³/day, the plant operates well within its capacity. As an Austrian facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment levels based on the sensitivity of receiving waters. The treated effluent is discharged into local watercourses that ultimately drain into the Danube River basin, contributing to the Black Sea watershed. The plant's advanced treatment helps protect downstream aquatic ecosystems and supports water quality in the region.

The plant discharges into local streams that flow into the Danube River, which drains into the Black Sea. The Danube basin supports diverse aquatic life and is an important ecological corridor. Advanced treatment at this plant reduces nutrient loads, helping to prevent eutrophication in downstream waters.