The MicroDrink Knowledge Base: A Multilingual Platform for Harmonizing Microplastic Monitoring in Drinking Water Across the Danube Region

Microplastic (MP) research in drinking water faces a persistent challenge: methods, analytical capacities, and legislative frameworks differ widely across countries, making comparison and coordinated action difficult. Within the Interreg Danube Region project MicroDrink, we developed the MicroDrink Knowledge Base to address this issue. The Knowledge Base is an open-access, multilingual online platform that compiles structured information on MP sampling methods, analytical methods, laboratory capabilities, instrumentation, legislation, and projects across the Danube Basin.

The platform is organized into six interconnected sections—Sampling Methods, Analytical Methods, Instruments, Projects, Legislation & Guidelines, and Laboratories. Each section contains curated content that has been reviewed and standardized to support comparison between countries and institutions. Sampling and analytical methods include preparation steps and performance characteristics used by partner laboratories. Instrument entries document specifications, supplier details, and typical detection limits. Legislative and guideline summaries highlight national frameworks relevant to MP monitoring, providing essential context for interpreting results. A directory of laboratories presenting their MP analysis capacity enables practitioners to identify regional expertise.

To support accessibility, the Knowledge Base includes multilingual data sheets available in six languages, making technical content more usable for water suppliers and national institutions. Embedded submission forms allow researchers, laboratories, and agencies to contribute updated methods, new instruments, and legislative changes. All submissions are checked before being uploaded, ensuring the resource remains accurate and up to date.

By consolidating dispersed knowledge into a single platform, the MicroDrink Knowledge Base enables saving of time and resources and strengthens cooperation across scientific, regulatory, and operational sectors. Its integration into the main MicroDrink website ensures long-term visibility and supports ongoing harmonization efforts in the Danube Region. This contribution presents the structure, content, and practical applications of the Knowledge Base, demonstrating its value as a shared reference point for MP monitoring in drinking water resources.