Data for "Mapping European Microplastic Emissions: Regional Signatures, Pathway Effects, and the Mass–Number Discrepancy"

This dataset supports the manuscript “Mapping European Microplastic Emissions: Regional Signatures, Pathway Effects, and the Mass–Number Discrepancy”. The dataset contains source-specific calculation workbooks and derived tables used to construct a harmonized EU-27 inventory of microplastic emissions from seven direct-release sources: tyre wear particles, textile microfibers, architectural paints, road markings, marine paints, scrubbing agents, and pre-production pellets. The files include compiled input data, parameter values, deterministic lower–central–upper scenario calculations, country-level outputs, mass and particle-number estimates, pathway allocation, wastewater-treatment and CSO sensitivity calculations, relative emission intensity calculations, and source-resolved summary results. The accompanying manuscript and Supplementary Information describe the model equations, source boundaries, data hierarchy, assumptions, parameter ranges, uncertainty treatment, mass-to-number conversion, and pathway-routing calculations. The dataset is intended to enable transparency and reproducibility of the EU-27 microplastic emission inventory and associated figures and tables.