Tasty tap water in the whole Warsaw

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Tasty tap water in the whole Warsaw. Fot.R.Motyl
Tasty tap water in the whole Warsaw. Fot.R.Motyl

Within the Water Treatment Station "Prague" at 21 Brussels Street there was launched modern installation of indirect ozone and carbon filters.

The finalisation of the investment means that each of the water companies in the Capital City in Warsaw has been equipped with advanced, efficient technological systems that allow residents to ensure that all agglomerations access to water of the highest quality.

- Thanks to the modernization, and above all the use of modern technology, chlorine will be eliminated from here treated water in the coming weeks. And mostly it affected the deterioration of its taste and smell - said Hanna Gronkiewicz-Waltz, Mayor of the Capital City of Warsaw at the opening of the SUW "Prague" .

- The fact that water from the waterworks in Warsaw reaches 98% of the population and that it is tasty, safe to drink straight from the tap, is a revolution as the Lindleyowskie waterworks in Warsaw which was built in the late nineteenth century. – stressed Hanna Krajewska, President of  MPWiK.

The project consisted of the expansion of the existing water treatment process further by intermediate ozonisation and filtration with granular activated carbon. The detailed scope of works included the complete construction of the ozonisation station and carbon filters station , intermediate pumping stations, storage building, technical support, as well as modernization of existing infrastructure.

The task was carried out in the framework of the Project entitled "Water supply and wastewater treatment in Warsaw - Phase IV", co-financed by the Cohesion Fund of the European Union.

The primary objective of the investment was to reduce the doses of agents used for final disinfection, which has a significant impact on improving the taste and smell of water supplied to residents. Contractor is a consortium IDS-BUD SA (leader), Seen Technologie Sp. z o.o. (partner), Instal Warszawa S.A. (partner). The contract is worth PLN 82 million.

How is the water purifying ?

The hitherto existing technological system, water is in-taken from the Vistula river with the help of perforated tubes (drains), arranged approx. seven meters below the bottom. After the process of infiltration by the natural deposit of sand and gravel, which remains at the bottom of the river, the water is subjected to aeration in aerators, and then hasty filtering . As a result of the technological development of the plant, a treatment process has been completed with subsequent stages

The first is the intermediate ozonisation: doses of ozone introduced into the water in four parallel ozonisation lines on a so-called  diffuser, and  a contact time of water with ozone is approx. 10 minutes. Then the water is filtered in carbon filtration in ten chambers with a total area of over 700 m2. Each of them is filled with the two-meter layer of granular activated carbon.

Thanks to the modernization of the treatment technology, organic particles are more effectively removed from water, which allows for significant reduction of doses of measures to be applied to the final stage - disinfection. The maximum planned daily capacity of the plant is 100 thousand m³, while the average daily production is close to 65 thousand m³ of water, which covers approx. 30% of the capital cities.

Where to drink water from Brukselska Street?

The direct investment result should be a significant improvement in water taste and smell felt by residents of nearly 1/3 of Warsaw, remaining in the supply zone of the water supply system (i.e. Wawer, Rembertów, Praga Południe, Wilanów, parts of Praga Północ, Targówek and  the area of Mokotów and Śródmieście located below the Vistula Slope).

By reworking all the water utilities of the Company that are operating based on the latest available technologies in the global market, in the whole Warsaw agglomeration water is delicious and safe to drink straight from the tap.

Over the coming months a chlorine used for disinfection will be completely eliminated , when chlorine dioxide is systematically limited (up to half).  

Now the priority of MPWiK remains systematic expansion and modernization of distribution system, in order to meet the expectations of the inhabitants of the metropolitan agglomerations in the availability of services.

The project "Water supply and wastewater treatment in Warsaw - Phase IV", is a part of the Operational Programme "Infrastructure and Environment" for structural assistance from the European Regional Development Fund and the Cohesion Fund. The total cost of the project has been set at PLN 1 483 895 378.46 . The amount of the financial contribution from the Cohesion Fund amounts to PLN 884 304 160.99.