Health Risk Assessment of Exposure to Radon in Water of Contaminated Kawo and Magiro Communities, Nigeria

Radon concentration levels in water from lead contaminated Kawo and Magiro communities in Rafi Local Government Area were assessed using RAD-7. The mean radon concentration in the areas ranged from 35.02 to 175.10 Bq L-1; while the weighted mean concentration was 87. 55 Bq L-1. The resulting weighted mean annual effective dose in the two communities for stomach were 30.64 mu Sv y(-1), 23.08 mu Sv y(-1) and 18.38 mu Sv y(-1) for infant, children and adults respectively. The mean and weighted mean concentrations in all the samples exceeded the maximum contaminant level recommended by International Organization. Forty five (45%) of the samples exceeded 100 Bq L-1 recommended by EU and WHO.