Investigating the indoor Concentration of Radon-222 and its possible health Implications on the staff of a Pharmaceutical Company in Ota, Ogun State, Nigeria

The present study investigated the concentration of radon in some offices of a pharmaceutical company in Ota, Ogun State. A Durridge RAD 7 equipment was engaged for the indoor radon measurement. The measurement of radon concentration was carried out for 8 days in 4 different offices in the main administrative building of the company (one office on the ground floor and three on the first floor). The results obtained for the four locations ranged between 19 and 160 Bqm−3 which is still below the world set limit of 200 Bqm−3 as recommended by International Commission on Radiological Protection. However, the office on the ground floor reported the highest concentration of radon-222, which is 160 Bqm−3. Therefore, it can be concluded that, since, the highest concentration of radon-222 observed in this study is below the international set limit, then, the occupants of the offices considered for this study are safe.