Abstract
Naturally accruing radioactive materials in the environment have received attention since they may be present in high level and pose risk to human health. The present work deals with measuring of Rn-222 in irrigation water samples from Wadi Al-Rummah, Qassim province, in central of Saudi Arabia. Rn-222 concentrations were measured by RAD7. It was found that the concentration of Rn-222 ranged from 2.1 +/- 1.2 to 7.2 +/- 1.5 BqL(-1). These values are below 11.1 BqL(-1) the maximum contamination level recommended from the U.S. Environmental Protection Agency. The calculated annual effective dose (AED) ranging from 7.5 to 26.1 mu Sv/y. It was evident that the total annual effective dose resulting from radon in irrigation groundwater in Wadi Al-Rummah in Qassim area were significantly lower than the recommended limit 1 mSv/y for the public.