ARA Modling 112 MD Wastewater Treatment Plant, Wiener Neudorf, Lower Austria

ARA Modling 112 MD is a municipal wastewater treatment plant located in Wiener Neudorf, Lower Austria, serving the Mödling district. The plant handles wastewater from a population equivalent of around 57,000, placing it in the medium-to-large agglomeration category under EU classification. As an Austrian plant, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The plant's treatment processes are designed to meet stringent Austrian and EU standards for effluent quality, protecting local water resources. The treated effluent is discharged into the local hydrological network, which ultimately drains into the Danube River basin. The Danube is a major European waterway supporting diverse aquatic ecosystems and providing water for downstream communities. The plant's operation helps maintain water quality in this sensitive river system.

The plant discharges into the Mödlingbach stream, a tributary of the Schwechat River, which flows into the Danube near Vienna. The Danube is a critical ecological corridor in Central Europe, supporting diverse fish species, migratory birds, and riparian habitats. The plant's treatment helps prevent nutrient loading and pollution in this downstream water chain.