Radon Assessment in Water Samples in a University Community in Osogbo Osun State

Abstract

Introduction: Radon is a radioactive gas and one of the leading causes of cancer at high concentrations globally. Inhalation or ingestion of radon-contaminated water through drinking, cooking, or bathing has reportedly increased human health risks. Measuring radon levels in water helps assess the potential health risks associated with ingestion and inhalation. Aims: In this study, the assessment of radon activity in water in some selected places within a university community in Osogbo, Osun State, Nigeria, was carried out. Materials and Methods: Fifteen (15) water (groundwater and borehole water) samples were collected, and the radon concentration was measured using a DURRIDGE RAD7 H2O accessory radon detector. Results: The results of the radon activity ranged from 6.3 ± 1.7 Bq/L to 60.8 ± 5.6 Bq/L with a mean of 21.33 ± 2.95 Bq/L. Nine (9) out of the fifteen (15) water samples measured were observed to be higher than EPA’s maximum contaminant level of 11.1 Bq/L, while the other six (6) water samples were within the range. The annual effective dose values lie within 3 -10 mSv/yr., reported by the International Commission on Radiological Protection. Conclusion: Water within the university community in Oshogbo, Osun State, is recommended for regular radon monitoring due to the high radon concentration above the Nigerian Standard for Drinking Water Quality. To Keywords: radon, Osogbo, water, RAD7 H2O