Notes: The variability in districts is lower than the variability pertaining to the whole territory. Only in nine districts, GSD is higher than the overall GSD. This result is logical, bearing in mind that the factors influencing radon variation have larger spatial variability on a larger territory instead of on a smaller one, where the effects are more uniform, in general. The similarities between the values of the GSD for neighboring districts are noticeable. Furthermore, the analysis has been shown that the value of the GSD is not related to the GM of CRn and to the number of measurements in each district since they were practically the same. The geometric standard deviation will be reassessed periodically too.  