Since the EU Directive (EC) No 128/2009 (SUD) was approved by the European Parliament, the establishment of a general framework aimed at securing the sustainable use of pesticides was laid down, and European Union (EU) Member States adopted National Action Plans in accordance with this Directive. Specifically, for EU Member States, pesticides, objectives and quantitative targets were created. Therefore, the EU Commission provided a methodology for risk assessment as the derivation of two harmonised risk indicators: HRI_1 and HRI_2. The present study focuses on HRI_1, as this can be implemented at the country level. Each EU Member State delivers annual harmonised risk indicators values to the Commission based on calculations using their own data and results. However, only the EU Commission can derive this HRI_1 (concatenated) indicator at the EU level. Therefore, the present study is an attempt to shed some light on the modus operandi used by the EU Commission to compile this HRI_1, and it also aims to clarify these calculations. Data originating from twenty-seven EU Member States were analysed. These data were compared to data published on the EU Commission website over time. Possible virtual developments including the modification and evolution of active substance statuses are envisaged.