Ahmadu Ibrahim, Dalhatu Muhammad, Sani Bello, Baba Jacob Buba, Umaru Musa, Kadala Yakubu Mbaya and Beatrice Humphrey Bomki
This research assessed the Radon (222Rn) concentrations in groundwater sources from Mubi- north metropolis, and estimated the associated excess lifetime cancer risk (ELCR) using the linear no-threshold (LNT) model. Radon concentration was estimated from the gross alpha activity concentration obtained using MCP 2000-DP at center for energy research and training (CERT) Ahmadu Bello University, Zaria. The mean Radon activity concentration in water and air ranging from 0.0082 – 0.1518 and 3.28 x10-9 -6.072 x10-8 Bq/L respectively, this meant that the concentration of Radon in water is far greater than in air, the annual effective dose for the locations ranging from 9.44 x10-18 – 4.723 x 10-16 Sv, and the excess lifetime cancer risk (ELCR) ranging from 3.637 x 10-17 – 1.818 x 10-15. The concentration of Randon in all the sampling locations were below the recommended screening limit of 0.5Bq/L by world health organization (WHO) and other radiation protection agencies, therefore the water from the locations is good for drinking and domestic activities.