Radon exposure in Germany: how to protect yourself from the invisible risk

Radon is an invisible, odorless gas that is produced when uranium decays in the ground. It can enter houses through cracks or building materials and accumulate there - especially in basements and first floors. Long-term exposure significantly increases the risk of lung cancer. In Germany, regions with a lot of uranium in the ground, such as parts of Bavaria, Saxony or the Black Forest, are particularly affected. Measuring devices can be used to determine the level of exposure, and radon in the home can be effectively reduced by ventilation, sealing or special protection systems.

What is radon and why is it dangerous?

Radon is formed when uranium decays in the ground and can enter buildings through cracks, fissures or building materials. The invisible and odorless gas accumulates indoors, especially in basements and first floor rooms. Long-term exposure significantly increases the risk of lung cancer.

Particularly endangered areas:

• Regions with high uranium or radium concentrations in the soil
• Areas with low air circulation in living spaces

Radon exposure in Germany: an overview

In Germany, radon levels vary from region to region. Particularly in southern and central parts of the country, such as Bavaria, Saxony and the Black Forest, radon levels are elevated.

The radon map of Germany

The "Radon map" of the Federal Office for Radiation Protection (BfS) shows the radon exposure in the various regions of Germany. On this map you can see whether your region of residence is one of the risk areas. Particularly affected are

• Hilly and mountainous regions
• Areas with permeable subsoil

An up-to-date radon exposure map helps you to better assess risks and plan suitable protective measures.

Radon occurrence in Germany | Image source: Radon map BfS

Tip: You can find a zoomable map on the BfS geoportal.

How can radon levels be measured?

A radon measurement is the first step in determining the exposure in your home. Special radon measuring devices record the concentration in the air and provide important data for assessing the risk.

Radon measurement methods

1. Long-term measurement (3-12 months):some text
   • Ideal for recording seasonal fluctuations.
   • Uses passive measurement methods such as detectors placed in living spaces.
2. Short-term measurement (2-7 days):some text
   • Faster results, but less accurate.
   • Suitable for initial assessments.
3. Professional radon measurement:some text
   • Experts use high-precision equipment and offer comprehensive analyses.

What is the best way to protect yourself from radon?

If the radon level in your home is elevated, there are effective measures to reduce the concentration:

1. ventilate rooms

Regular shock ventilation ensures better air circulation and reduces the radon concentration.

2. seal leaks

Seal cracks and crevices in basements and floor slabs to minimize radon ingress.

3. install radon protection systems

Radon extraction or ventilation systems help to reduce exposure in the long term.

Radon is an often underestimated risk that occurs in many regions of Germany. You can use a radon exposure map to find out whether your region is affected and check the concentration in your home using suitable measuring methods. Preventive measures such as regular ventilation and sealing help to reduce radon exposure and protect your health.