Abstract
The levels of natural radionuclides in metallic spring water (either for spa and household use), potable water (local domestic network), soil and rock samples were measured in the island of Ikaria in the Aegean Sea, Greece. The concentrations of 222Rn and natural γ emitters were found to be significantly elevated in spring water and some soil and rock samples. The external and internal dose rates (μSv year −1) were estimated in three critical groups according to the water use. The maximum external dose rates were found to be at the upper limits of the levels reported in the literature. Moreover, high dose rates were estimated for the workers in spa installations.
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