Legal dispositions concerning radon

The legal dispositions for radon are mainly laid down in the ordinance on radioprotection (ORaP).

As from 1.1.2018, the limit value of 1000 becquerels per cubic meter (Bq/m3) is replaced by a reference level of 300 Bq/m3 for the average annual concentration of radon gas in "premises where people stay regularly for several hours a day". In addition to this reference level, a threshold value of 1000 Bq/m3 is applicable for the average annual concentration of radon gas at workplaces exposed to radon. Further information can be found in the following note: 

The following Radon guidelines are intended to fulfill the requirements of the Radiation Protection Ordinance and correspond to the current state of science and technology:

Further information

Radon map of Switzerland

Consult the radon map and carry out the radon-check in order to determine the urgency for a radon measurement in your building.

Last modification 23.06.2021

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Federal Office of Public Health FOPH
Division of Radiological
Radiological Risk Section
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