Analysis of factors as of radon index example of Vitebsk region

The article addresses the issue of natural radioactive gas ? radon. It is shown that increasing the number of factors that determine the presence of radon in the soil, increases the coefficient of correlation of the proposed measure radon and radon activity concentration in the buildings of the rural settlements of the Vitebsk region. The resulting radon indicator can be used to map the territory for radon risk in a large-scale version.