Obligations of the companies: what must do?

The Royal Decree 1029/2022 establishes which are companies that can be exposed to the radon and which are obligations that they must follow.

Companies that by activity can be exposed to radon must know the exposure level in its work centres carrying out measurements of radon on the air.

From June 2024, other companies that may be exposed to radon due to their location will also be required to take measurements to assess radon exposure in workplaces located on underground or ground floors within the municipalities of priority concern

The Instruction, published on 1 May 2025, defines municipalities of priority concern as those classified as Zone II in Appendix B of section DB HS-6 of the Spanish Technical Building Code.

The exhibition to radon owes be managed as a risk more in the position of work. The radon owes be identified in the risk assessment and if the reference level is exceeded of 300 Bq/m3, they are owed to plan and to adopt measures to reduce the exhibition, in accordance with the beginning of optimisation.

The first measure is to ventilate the space before accessing to reduce the concentration of radon gas. Additionally will be owed to revise the building to implement solutions in the improvement of its isolation as the sealed one of frameworks and fissures and, according to obtained levels, to waterproof characters and/or to reduce the presence of radon in the field through systems of despresurización of the field or with spaces of containment.