The alpha particles released from radon gas are considered very dangerous radiation on the all parts of the Humans body because they have a high energy that effects on the inner lining of the organs causing cancer. This goal took 60 samples from a number of points on the Hilla River passing through that area in archaeological Babylon to determine the level of Radon gas, and then take 30 blood samples from the people consuming this water to measured (GPT, Uric Acid, and GOT) as a healthy indicators for these people, where the results illustrated that the average concentration of radon is (0.289+0.105) Bq/L, and annual effective dose resulting from human exposure to radon gas in water were also determined to be (0.00106+0.00038) mSv/y it is within the permissible range but it is a high level and its agreement with the nature of river floor soil and its asymptotic with the amount of radon that be recorded in the another regions in Iraq state, as well as Radon concentrations and (GPT, Uric Acid, and GOT) illustrated the groundwater in archaeological Babylon is safety.

Natural Radiation, Rad7, Cancer, Al-Halla River, Archaeological Babylon.