ARA Hohenau ad March 330 GF - Advanced Wastewater Treatment in Hohenau an der March, Austria

ARA Hohenau ad March 330 GF is a municipal wastewater treatment plant located in Hohenau an der March, in the state of Niederösterreich, Austria. The plant serves a population of approximately 2,962 and has a design capacity of 5,000 m³/day, with an average discharge volume of 662.72 m³/day. As an advanced treatment facility, it goes beyond secondary treatment to remove nutrients and other pollutants, meeting stringent Austrian and EU standards. Under the EU Urban Waste Water Treatment Directive, plants in sensitive areas are required to achieve tertiary treatment, and Austria designates many water bodies as sensitive, particularly those draining into the Danube and its tributaries. The plant discharges treated effluent into the local water system, which ultimately flows into the March River and then the Danube River. The Danube is a major European waterway that drains into the Black Sea, supporting diverse aquatic ecosystems. The plant's advanced treatment helps protect downstream water quality in this ecologically significant basin.

The plant's treated effluent enters local waterways that drain into the March River, a tributary of the Danube. The Danube River basin is one of Europe's most important ecological corridors, supporting a wide range of fish species and migratory birds. Advanced treatment at this plant helps reduce nutrient loading, which is critical for preventing eutrophication in downstream lakes and the Black Sea.