Radon map of Switzerland

The radon map indicates the probability [%] of exceeding the reference value of the radon concentration of 300 Bq/m3 in a building. Carry out the radon-check in order to determine the urgency for a radon measurement in your building.

Radon map and radon-check

Probability [%] of exceeding the reference value:

The radon map is available in an interactive form on the geocatalog of Swisstopo. Click on that map to obtain the probability for a specific site (zoom in strongly to select a single pixel of 1x1 km). The confidence index (high, medium, low, very low) indicates the reliability of the estimated probability.

Interactive radon map

To carry out a recognised measurement of radon levels, you should contact one of the measurement services, listed below:

Further information

Federal Office of Public Health FOPH

Radiological Protection Division
Radiological Risk Section
Schwarzenburgstrasse 157
Switzerland - 3003 Bern