Radon map of Switzerland

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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 

Probability [%] of exceeding the reference value:

Radonkarte

Source: Federal Office of Public Health, 2025

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:

List of measuring laboratories (PDF, 454 kB, 10.04.2025)

To perform the radon-check, click on the following link:

Radon-Check

Documents

List of measuring laboratories (PDF, 454 kB, 10.04.2025)

List of cantonal officials responsible (PDF, 81 kB, 07.02.2025)

Radon guidelines (in French) V 2.3 (PDF, 4 MB, 23.02.2023)

Last modification 05.05.2025

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Contact

Federal Office of Public Health FOPH
Radiological Protection Division
Radiological Risk Section
Schwarzenburgstrasse 157
3003 Bern
Switzerland
Tel. +41 58 464 68 80
E-mail

Print contact

https://www.bag.admin.ch/content/bag/en/home/gesund-leben/umwelt-und-gesundheit/strahlung-radioaktivitaet-schall/radon/radongebiete-ch.html