World Rivers Day 2025. Time to look straight into the current!

There is no person in the world whose life is not influenced by a river – the one that supplies a drinking water lake, gives life to nearby forests, or the one that is drying up right now. World Rivers Day is not an occasion but an alarm that should wake us all up. Check what you know about rivers and the help they deserve.

5 facts about Polish rivers

The queen of Polish rivers is, of course, the Vistula, with a length estimated at 1,022–1,047 km. Where does this discrepancy come from? On the slopes of Barania Góra lie the sources of the Czarna and Biała Wisełka streams, which join in the Wisła-Czarne reservoir. From there flows the Wisełka, which officially becomes the Vistula only after joining with the Malinka stream. Everything therefore depends on the method of measurement.

The Vistula also leads in another respect: the highest average annual discharge. Its figure is 1,080 m³/s – twice as much as in the case of the Oder.

The shortest river in Poland and all of Europe is the Klonownica, also known as the Silent Stream. Well known to kayakers, it connects the Niecko and Białe lakes and measures only 550–800 m in length.

Three Polish rivers determined the shape of our country’s territory – the Bug in the east, and the Oder and Lusatian Neisse, which mark the border with Germany. The Dunajec also deserves attention, as it forms the Polish-Slovak border for 17 km. Its main asset, however, is the picturesque meanders in the Pieniny Mountains, three of which bend at more than 130°.

How do we poison rivers?

Unfortunately, up to 90 percent of Polish rivers do not meet the requirements of the EU Water Framework Directive – their status is described as poor. According to Dr. Paweł Jarosiewicz, a hydrologist from the University of Łódź, the main pollutants are nitrogen and phosphorus washed out from farmland, municipal stormwater systems, and wastewater treatment plants. The consequence is progressing eutrophication of watercourses and recurring blooms of algae and cyanobacteria – often toxic to humans.

But we can also blame ourselves. Synthetic microfibers are becoming an increasingly serious problem, entering sewage systems from our washing machines. Yet installing a special filter would be enough to limit microplastic pollution in Polish rivers. Another harmful habit is flushing wet wipes down the toilet – most of them are not biodegradable and, together with stormwater overflows, may end up in rivers, forming deposits dangerous to the environment.

Rivers of the future, or a return to nature

Many things are, however, changing for the better. As part of implementing the Nature Restoration Law, Poland plans to restore nearly 1,500 km of rivers. What does this mean? Weirs, locks, dams, and concrete bank reinforcements will be dismantled to bring back the natural meandering of rivers and enable aquatic organisms to migrate freely.

Good examples? Wody Polskie is launching the “Natural Nida” project, which aims to increase natural retention in the Nida valley, revitalize oxbow lakes, restore floodplains, and open up ecological corridors along a stretch of nearly 40 km. Similar activities are already being carried out in the Pilica catchment with the support of the LIFE program, and the 2025–2031 plans include, among others, the restoration of the Parsęta basin and the Dłubnia River.

World Rivers Day: make friends with your river

Every stream or brook around us matters. They flow further, joining larger rivers, feeding lakes and the sea. They are lifelines that make Polish nature so lush. The best lesson in this respect will be a visit to national parks centered around impressive rivers: Drawa, Biebrza, or the newly created Lower Oder Valley National Park.

And if you don’t have time for a longer trip, go for a walk today along your local river, however modest it may be. Pay attention to the plants, insects, and birds around it, look at the speed of the current and the clarity of the water. And think about whether the local community is harming it by littering or washing cars on the banks. Maybe you will meet neighbors who also care about the fate of your river?