Article L1333-22 of the French Public Health Code
Owners or operators of certain categories of built property located in areas with radon potential where exposure to radon is likely to be harmful to health must monitor this exposure. Above certain levels of radon activity, owners or, failing that, operators are required to take the necessary measures to reduce exposure and protect people’s health. The categories of buildings, the monitoring procedures and the above-mentioned radon activity levels are defined…