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The UV Index (UVI) is internationally standardized. It is a measure of the intensity of UV radiation reaching the earth's surface on a horizontal area, weighted according to the risk of sunburn.

SAR values of mobile phones

mobile phones

SAR values of mobile phones

The specific absorption rate (SAR) is a measure for the energy absorbed by the body. Its measure is Watt per kilogram (W/kg). In order to avoid adverse health effects, the specific absorption rate of a mobile phone must not exceed 2 Watts per kilogram.


Radon in buildings


Radon is constantly generated in soil by the radioactive decay of radium. The radon concentration in soil air greatly influences the radon migration into a building. A map of radon concentrations in soil air in Germany is the basis for assessing the regional radon situation.

Information for

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BfS-Infomobil beim BMUB

Information material

The Federal Office for Radiation Protection (BfS) provides you free of charge with information about many key topics around radiation protection. Videos (in German only) and topic pages are to provide an image of many radiological aspects and help understand the complex correlations.

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Expert knowledge

For professionals in the field of radiation protection, for scientists and researchers, as well as for physicians and for manufacturer of X-ray equipment for non-medical purposes, of transport containers for radioactive materials or of equipment and devices, in which radioactive material is inserted, BfS provides specific technical information on its website.

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Contact persons at BfS press office

Press information

Your contact persons at the BfS press office will help you with your inquiries. You can contact them by using the weblink "Press contact". Or have a look at more current information for media representatives.

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