This dataset was reported by the Grand Duchy of Luxembourg under the EU Directive 2012/18/EU (Seveso III).

Facilities are classified into two categories: either lower-tier establishments or upper-tier establishments.

The Grand Duchy of Luxembourg currently has 9 lower-tier establishments and 9 upper-tier establishments.

The "Inspection du travail et des mines", under the authority of the Minister responsible for Labor, performs technical missions to collect information, advise, monitor, inspect, coordinate and contact the authorities of the countries neighbors of the Grand Duchy of Luxembourg and of the European authorities, missions carried out on behalf of the above-mentioned minister as competent authority.

Description copied from here.