activity concentrations of natural radionuclide levels in well waters of ago iwoye, nigeria

background: natural radioactivity, though natural requires concentration monitoring, especially for the health/ environmental checks of the populace. materials and methods: the activity concentrations of 40k, 238u and 232th in the waters from wells with depths ranging between 141.0 - 214.0 feet were randomly sampled and determined from 20 locations in ago-iwoye town in south western, nigeria. results: the activity concentrations obtained were in the ranges of (9.9-50.9)bq/kg with mean value of (25.1± 10.7) bq/kg for 40k, (bdl-15.0) bq/kg with mean value of (1.2 ± 3.2) bq/kg for 238u and (bdl-6.2) bq/kg with mean value of (1.6 ± 1.7) bq/kg for 232th. conclusion: according to the results obtained for the activity concentrations from 20 well water samples in ago iwoye, southwestern, nigeria it was observed that the v40k, 238u and 232th values were still within the tolerance level indicating minimal radiological health burden on the human populace and the environment. iran. j. radiat. res., 2010 7 (4): 207-210