
In this study, we have measured the radon and radium concentration in the more than 200 drinkable water sample collected around of Mashhad, specially the religion tourist sites like Khajeh Rabie, Khajeh Abasalt, Khajeh Morad Temples, Ferdowsi tomb, Torghabe, Trogh and Shandiz tourist tawns. The result shows that there is a significant correlation between radon and radium of water samples. The Radon is a liner function of the radium with a good liner correlation coefficient of 0.907.