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New waterworks on Danube Island: Vienna is planning major investments by 2030!
Vienna is building a new waterworks on the Danube Island by 2030 to ensure drinking water supplies for the growing population.
New waterworks on Danube Island: Vienna is planning major investments by 2030!
Something is happening on the Danube Island! A new waterworks will be built by 2030, which will not only ensure drinking water quality, but also respond to the increasing water needs of the Viennese population. The city of Vienna plans to cope with an increase in population from the current 2 to around 2.3 million by 2050, which will be accompanied by an increase in daily water requirements from 400,000 to 450,000 m³. The demand could increase by up to 15 percent, which underlines the urgency of the project, as MeinBezirk reports.
The new waterworks will be built between the Nordbrücke and Steinitzsteg and will deliver up to 1,000 liters of fresh drinking water per second. Preparatory work for the waterworks is planned to begin in October 2025, while construction will start in spring 2026 and is expected to be completed by 2030. The construction work will affect pedestrian and bicycle traffic on the Danube Island, so diversions are necessary to ensure the safety of all road users, according to the official press of Vienna Wien.gv.at highlights.
Innovative water treatment
The water treatment in the new plant will simulate the natural purification in the mountains, which is crucial for the high quality of the drinking water. The process includes aeration, followed by two-stage filtration and finally disinfection with UV light. These modern processes are intended to ensure that the water remains healthy and pure, even as the city continues to grow.
Keep an eye on finances: Every year around 120 million euros are invested in Vienna's water supply in order to achieve the goals of the “Vienna Water 2050” strategy. Climate City Councilor Jürgen Czernohorszky emphasizes the importance of these measures to ensure security of supply at a time when population growth and the climate crisis are increasing the need for water, as Die Presse also notes.
Expansion of existing infrastructures
But the waterworks is only part of a larger plan. The expansion of the existing water system also includes the annual renewal of around 40 kilometers of pipes throughout Vienna. From April 2026, a new pipeline project will be started in Floridsdorf for around 39 million euros. At the same time, the world's largest closed drinking water tank is being built in Neusiedl am Steinfeld, which will be able to store up to 1 billion liters of water in the future.
The “Vienna Water 2050” strategy also provides for other important projects, including the construction of a fourth and fifth drinking water main pipeline and the renovation of the second high spring pipeline. These comprehensive measures are necessary to ensure Vienna's water supply in the future and to cushion the effects of climate change.
Overall, it shows that the city of Vienna is well positioned with the construction of the new waterworks and the associated infrastructure measures to meet the requirements of the future while maintaining the quality of the water. The focus on modern technologies and sustainable practices is another step in the right direction.