Radon, the heaviest among the noble gases in the periodic table of element is a radioactive nuclide that is naturally available in rocks, soil and water. It has become the subject of many research efforts in recent years due to its leading role in causing cancer. In this study, a total of 68 groundwater samples were collected and assayed using alpha spectrometry with RAD7 radon detector with RAD-H₂O accessories manufactured by Durridge CO (USA). The ²²²Rn concentration measured were in the range of 0.6–36.2 Bq L⁻¹ with an average of 13.33 Bq L⁻¹, 7.0–41.5 Bq L⁻¹ with mean value 23.3 Bq L⁻¹ and 0.6–27.4 Bq L⁻¹ with an average value of 7.4 Bq L⁻¹ for hand dug wells (HDW), hand pumped boreholes (HPB) and motorized boreholes (MBH), respectively. About 54, 86 and 15% of samples from the HDW, HPB and MBH, respectively, exceeded the parametric reference level of 11.1 Bq L⁻¹ suggested by United State of America Environmental Protection Agency but lower than the permissible limit of 100 Bq L⁻¹ by World Health Organization (WHO) and European Union. The average annual effective doses resulting from inhalation and ingestion of radon in water obtained for the three groundwater sources are less than recommended limits by WHO and ICRP. The data obtained from this study are comparable with similar studies conducted in Nigeria and other parts of the world as reported in literature. Continuous radon monitoring in drinking water and indoor environment is however recommended for the study area.

element是元素周期表中稀有气体中最重的一种，是天然存在于岩石，土壤和水中的放射性核素。由于其在引起癌症中的领导作用，近年来它已成为许多研究工作的主题。在这项研究中，总共收集了68个地下水样品，并使用带有DU7 don RAD-H ₂ O附件的RAD7 alpha气探测器（美国）制造的α光谱仪进行了测定。在²²²测量的RN浓度分别为0.6-36.2贝L的范围^-1，平均13.33贝大号^-1，7.0-41.5贝大号^-1与平均值23.3贝大号^-1和0.6-27.4贝大号^-1平均值为7.4 Bq L ^-1分别用于手动挖井（HDW），手动泵送钻孔（HPB）和电动钻孔（MBH）。关于54，86和15％来自HDW，HPB和MBH样品，分别超过了11.1贝L中的参数参考电平^-1由美国环境保护局的美国国家建议，但超过100贝L时可允许的下限^{- 1个}由世界卫生组织（WHO）和欧盟。三种地下水来源因吸入和摄入water而获得的年平均有效剂量低于WHO和ICRP的建议限值。从这项研究中获得的数据与文献报道的在尼日利亚和世界其他地区进行的类似研究具有可比性。但是，建议对研究区域在饮用水和室内环境中进行连续ra监测。