About this database

This website and database are © ICPDR - International Commission for the Protection of the Danube River.


This database contains the following results from samples collected during JDS4:

  • Biological Quality Elements:
    • Aquatic macroinvertebrates (Macrozoobenthos)
    • Phytobenthos
    • Zooplankton
    • Fish (available soon)
    • Macrophytes (available soon)
    • Phytoplankton (available soon)
  • Chemical analysis in water (biota) of the following parameters:
    • Basic physico-chemical parameters.
    • Target analysis of organic and inorganic micropollutants.
  • Flow data during the survey

MAC-EQS for inland surface waters shown in graphs were taken from EU Directive 2013/39/EU.


Data contained was collected by experts involved in the Joint Danube Survey 4 in 2019.

You can log in with your existing account or register a new account at Danubis to download data. When doing so, you accept the Electronic User License Agreement of the ICPDR.

Further information

Cover of JDS4 Scientific Report

The report A Shared Analysis of the Danube River contains an overview of the scientific findings of the Joint Danube Survey 4 (JDS4).

It is available for download on the Joint Danube Survey 4 website.