Abstract

• The aim of the present work is to carry out the radon concentration of water at some lakes from Mandalay Region and annual dose received by the people. Water samples from Sedawgyi, moat of Mandalay, Kandawgyi and Taungthamann were collected. Radon level in raw water (40 mL) was measured with RAD7 continuous radon monitor. By verification of the results, it can be checked out whether the WHO recommended permissible level (100 pCi/L) was exceeded or not. Mean radon concentration of the water samples are 10.6 pCi/L, 16.0 pCi/L, 10.7 pCi/L, 8.0 pCi/L and do not exceed the safe limit level. However, continuous monitoring of radon concentration is basic description of public water safety.