ARA Gumpoldskirchen 898 MD Wastewater Treatment Plant, Gumpoldskirchen, Austria

ARA Gumpoldskirchen 898 MD is a municipal wastewater treatment plant located in Gumpoldskirchen, a town in the district of Mödling in Niederösterreich, Austria. The plant serves a population of about 5,800 residents, placing it in the small agglomeration category under EU classification. As an Austrian plant serving fewer than 10,000 people, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires appropriate treatment based on the sensitivity of the receiving waters. For small agglomerations, secondary treatment is typically mandated unless the discharge is into a sensitive area requiring more advanced treatment. The plant's 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 plays a key role in protecting downstream water quality in this important international basin.

The plant discharges into the local tributaries of the Danube River, which flows through eastern Austria and ultimately reaches the Black Sea. The Danube basin is ecologically significant, supporting diverse fish species, migratory birds, and riparian habitats. The plant's treatment helps maintain water quality in this sensitive river system, which is used for drinking water, recreation, and agriculture downstream.