Abstract
This study has evaluated the levels of natural radionuclides in spring water and drilled water, which are used as potable water reservoirs and samples from the local water supply network, in the island of Ikaria in the Aegean Sea and potable spring water in Loutraki in the Korinthiakos Gulf, Greece. The activity concentrations of 226Ra and 222Rn were in the range of <0.1–0.7 Bq l-1 and <0.1–114 Bq l-1, respectively. The radiological impact on the habitants, due to consumption of drinking water, was calculated taking into account the annual intake, through ingestion, of 226Ra and 222Rn. In order to estimate the radiological impact from 222Rn inhalation, due to its release from water, the mean contribution of the waterborne 222Rn to the indoor air concentrations was evaluated on the basis of the transfer coefficient of 10-4 from water to air. The effective dose equivalents due to 226Ra ingestion were in the range of 25–175 𝛍Sv y-1, with the maxima reaching the recommended limit of 100 𝛍Sv y-1. The effective...
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