In this study an inventory system was designed which fulfills the reporting requirements of the current European Union legislation for air emissions. Given the reporting requirements deriving from the EU Directives, International Conventions, and Inventory Methodologies developed at the EU level, there are significant differences in the required data in terms of industrial categories, definitions of point and area sources, whether TVOC or individual species must be determined, and expression of VOCs emissions. On the basis of this concept, an inventory system was structured that aims to comply with the framework set by the European Union for the evaluation of VOCs emissions from industrial activities and other facilities in Greece. This inventory can be very helpful to all the EU members states, as well as the Eastern European countries that are in pre-accession phase, who must implement the European legislation concerning VOCs emissions.