Abstract: “Airborne radiometric surveys showed that Aja heights, of granitic composition, represent a radiometric anomaly area and should be of interest for detail study in a purpose of radiation protection. Ground surveys and radiometric analysis of rocks, surface soil, building materials and groundwater samples have been conducted. Radon-222 has been measured in groundwater and in the atmosphere (indoor and outdoor) of the inhabited area. Root uptake of natural uranium by vegetation grown in farms lie in the foot of the granitic massif has been investigated. Ground surveys showed an average effective dose rate, due to terrestrial γ-radiation, of 1.49 mSv/y. This level is about 3.3 times greater than the world average external effective dose rate (0.46 mSv/y) that estimated in normal background areas. The average concentrations (249 and 383 Bq/kg, respectively) of 238U and 232Th in the collected rock samples were higher than their worldwide average (about 61 Bq/kg for both radionuclides) in gran”

Keywords: environmental radioactivity, uranium, radium, radon, radiation exposure, environmental pollution