In 2016, Belgium has 381 establishments classified Seveso: 209 upper-tier establishments and 172 lower-tier establishments. This number varies and the classification is adapted by the Federal Public Service Employment, Work and Social Consultation, as well as by the Regions.
Different industrial sites are concerned by the Seveso risk:
- The raw material production sites with intrinsic hazards (inflammability, toxic, explosive)
- The raw material processing sites
- The storing and distribution of dangerous substances sites