radioactivity monitoring in drinking water of zahedan, iran

background: the present research has focused on the effect of radioactivity on drinking water from five sites in the region of zahedan city. materials and methods: the measurement of water activity in wells, river and spring has been used as a screening method. the determination of gamma emitters was performed by use the application of gamma spectrometry. results: the values of radium concentration was between less than 2 mbq/l to 3±0.4 for water wells, 5±0.4 mbq/l for river, and less than 2 mbq/l for spring. conclusion: all values of activity in the selected water samples were lower than the permissible limit for drinking water consumption. the water was safe for drinking, washing and agricultural use.