Navigation and service

Ionising radiation

Environmental Radioactivity - Medicine - Occupational Radiation Protection - Nuclear Hazards Defence

Ionisierende Strahlung

What is the spatial distribution of radon in Germany?

A map of Germany Outline of Germany

In Germany, there are regional differences in the amount of radon in the soil, in the air and indoors. In the North German Plain, radon concentrations are mostly low; in most low mountain ranges, in the Alpine foreland and in regions with moraines of rock from the last ice age they are rather high.

The BfS provides maps on the regional distribution of radon in soil, indoors and outdoors.

No information about single buildings or plots can be derived from the forecast maps.

Map of Germany with presentation of the radon activity concentration in the soil air

Radon in the soil air in Germany

In Germany, radon concentrations in the soil vary regionally. BfS prognosis maps show in a coarse grid the regional distribution of radon in the soil. Statements on single buildings or building plots require individual examinations.

Radon concentrations in the ground-level atmosphere

Radon outdoors in Germany

Outdoors, radon mixes quickly with the surrounding air. At breathing height, radon occurs only in low concentrations in Germany. The concentration is lower in the north of Germany than the south. A map shows the regional distribution of radon outdoors (at breathing height).

Map of Germany with diagram of the average radon concentrations in dwellingsSource: (according to Menzler et. al.)

Indoor radon in Germany

Due to the fact that radon-containing soil air enters buildings from the subsoil, radon occurs everywhere indoors. A map shows the average radon concentration in dwellings in Germany. The map does not provide any information about single buildings. What indoor radon concentrations actually occur in buildings, can only be clarified by measurements.

A map of Germany with a question mark

Radon areas in Germany

The Radiation Protection Act obliges the federal states to indicate by the end of 2020 the areas where a high concentration of radon can be expected in many buildings. Under the Radiation Protection Act, different regulations for protection from radon apply in these areas – this depends on whether the buildings are residential or workplaces. To determine these areas using a sufficient data foundation, the federal states are implementing measurement programmes.

© Bundesamt für Strahlenschutz