Paragraph 1: General provisions

For the application of articles L. 221-7 of the Environment Code and L. 1333-3 of this Code, the reference level for average annual radon activity is set at 300 Bq. m-3 in built-up buildings. An order by the minister responsible for radiation protection, issued after consultation with the High Council for Public Health, specifies the health information and recommendations to be disseminated, by the authorities or bodies it designates, to…

The national territory is divided into three radon potential zones defined on the basis of radon exhalation flows from the ground: 1° Zone 1: areas with low radon potential ; 2° Zone 2: areas with low radon potential but where particular geological factors may facilitate the transfer of radon to buildings; 3° Zone 3: areas with significant radon potential. The list of municipalities divided into these three zones is set…

I. – Radon activity by volume is measured using passive integrated radon measurement devices under conditions that guarantee the representativeness of the measurement. II. – The analysis of these passive integrated radon measurement devices is carried out by bodies accredited by the French Accreditation Committee or by another member body of the European Cooperation for Accreditation that has signed multilateral mutual recognition agreements. As part of the accreditation procedure, these…

Every year, the accredited bodies mentioned in article R. 1333-30 communicate the results of the analysis of passive integrated radon measurement devices and associated data to the Institut de Radioprotection et de Sûreté Nucléaire. This information shall not include any directly or indirectly identifying data. The nature of the data and the procedures for transmitting it are specified by an order of the ministers responsible for radiation protection and labour.