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With just one month to go until Danube Day 2026, preparations are well underway across the Danube River Basin. On 29 June, countries, communities, schools, institutions and organizations throughout the region will come together to celebrate the Danube and the shared responsibility to protect it.

On 29 June 2026, countries across the Danube River Basin will once again come together to celebrate Danube Day, an annual tradition launched by the International Commission for the Protection of the Danube River (ICPDR) in 2004.

Have you ever wondered what secrets a single drop of water from the Danube River might hold? At this year’s Long Night of Research on 24 April 2026, the ICPDR invited visitors to find out at the Vienna International Centre (VIC).

The ICPDR is pleased to share a first glimpse into the microbiological findings emerging from the Joint Danube Survey 5 (JDS5) — the world’s largest river basin monitoring programme carried out on a single river system. While full results will only be available once all samples from the 108 sampling sites have been analysed, early data from the microbiology component show encouraging trends across the entire Danube Basin.