Microplastic (MP) approach harmonised at EU and non-EU level - Output 1.1.

The presented harmonised microplastic (MP) approach results from the synthesis of several complementary sources of evidence generated within the MicroDrink project. These include MicroDrink Knowledge Base on microplastics in drinking water resources across the Danube River Basin, the technical implementation of harmonised sampling and analytical procedures during project pilot activities, the structured mapping of monitoring capacities across participating countries, and stakeholder input gathered through surveys, workshops, and expert discussions.

The harmonised MP approach is presented as a supportive and non-binding reference framework designed to facilitate methodological alignment without imposing rigid standardisation. The framework provides a set of minimum technical principles and documentation practices that can be voluntarily adopted by national authorities, water utilities, and laboratories. At the same time, it allows proportional implementation reflecting differences in monitoring capacity, laboratory infrastructure, and national regulatory contexts across the Danube River Basin.

Output 1.1 therefore represents a coordinated transnational effort to improve methodological transparency and preparedness regarding microplastics in drinking water. By consolidating knowledge from project activities, stakeholder consultations, and evolving EU methodological developments, the harmonised MP approach provides a practical reference that supports comparability of monitoring practices across EU and non-EU countries in the Danube River Basin, while remaining consistent with the preparatory and capacity-building mandate of the MicroDrink project and the Interreg Danube Region Programme.