Abstract
The focus of this study is to investigate the suitability of Lake Miri, a lake with high natural radioactivity in the southwest of Sudan, as a water source for nearby villages. Soil, water, foodstuffs and vegetable samples were collected and analyzed. The results indicate that the mean natural radioactivity level in the study area is 450nGy/h, which is ten times greater than other places in Sudan with normal background (40nGy/h) natural radioactivity, and these findings demonstrate that the average annual exposure of the population is 38.4mSv.