Agbabu community in Ondo State Southwestern, Nigeria, is characterized by the high volume of bitumen deposit. The level of radon concentrations in soil gas and groundwater was assessed using RAD 7. Soil gas radon concentration ranged from 0.2 ± 0.1 kBqm⁻³ to 92.7 ± 2.4 kBqm⁻³ with an average of 20.6 ± 0.8 kBqm⁻³. The radon concentration in shallow wells water samples ranged from 9.8 ± 3.6 Bql⁻¹ to 64.5 ± 10.6 Bql⁻¹ with a mean value of 30.2 ± 6.7 Bql⁻¹. The total annual effective dose due to ingestion and inhalation of radon ranged from 28.1 to 185.1 µSvy⁻¹, 27.3 to 179.4 µSvy⁻¹ and 26.8 to 176.1 µSvy⁻¹ with mean values of 86.6, 83.9 and 82.4 µSvy⁻¹ for infants, children and adults, respectively. The total annual effective dose obtained in 33% of the shallow wells water samples exceeded 100 µSvy⁻¹ safe limits recommended by the World Health Organization (WHO). Radon concentration ranging from low to high was revealed in mapping, 3D surface mapping and geogenic radon potential. The groundwater in shallow wells that exceeded the recommended limit could pose significant radiological burdens such as occurrences of cancer among the populace. Therefore, water samples from those wells should be aerated before consumption.

尼日利亚西南部翁多州的Agbabu社区的特点是沥青沉积量高。使用RAD 7评估了土壤气和地下水中ra的浓度水平。土壤气中的from浓度范围为0.2±0.1 kBqm ^-3到92.7±2.4 kBqm ^-3，平均值为20.6±0.8 kBqm ^-3。浅井水样中的don浓度范围为9.8±3.6 Bql ^-1至64.5±10.6 Bql ^-1，平均值为30.2±6.7 Bql ^-1。每年的总有效剂量因摄取和氡范围从28.1到185.1μSvy吸入^-1，27.3至179.4μSvy ^-1和26.8到176.1μSvy ^-1婴儿，儿童和成人的平均值分别为86.6、83.9和82.4 µSvy ^-1。在33％的浅井水样中获得的年度总有效剂量超过了世界卫生组织（WHO）建议的100 µSvy ^-1安全限值。测绘，3D表面测绘和地质genic气势揭示了concentration浓度从低到高的范围。浅井中的地下水超过了建议的限值，可能会造成巨大的放射学负担，例如民众中癌症的发生。因此，在使用之前，应对这些井中的水样进行充气。