Natural radon risk

Radon (Rn) is a naturally occurring radioactive, colourless, and odourless gas that is found almost everywhere in Estonian soil. Since radon is one of the main causes of lung cancer, it is important to monitor it. Areas with high and particularly high levels of radon are specific to the North Estonian Klint zone, especially the superficial deposits of graptolitic argillite and phosphorite. Radon risk is also high in some parts of Central and Southern Estonia.

The environmental geologists of the Geological Survey of Estonia (EGT) study the occurrence of radon across Estonia. Based on the data collected from soil air radon surveys and taking into account the geological aspects that contribute to the spread of radon, the radon risk in different regions of Estonia can be assessed. This information is of particular value to local governments in applying the requirements arising from Regulation No. 28 of the Minister of the Environment adopted in 2018. The results of this research also benefit private persons and construction firms who are interested in the radon risk in their community or construction site. This way, in high-radon areas, it is already possible to install radon barriers in buildings during construction to prevent future radon issues. In the case of older residential buildings that are located in high-radon areas, it is a good idea to explore avenues for measuring indoor radon concentration and, where necessary, take measures to reduce radon levels.

The radon risk map

Ongoing projects