Abstract

Elevated levels of groundwater radioactivity found in fifteen wells from the Disi aquifer in Jordan and in the main collection reservoir were investigated. The estimated annual doses in the studied wells and the reservoir are 0.53 ± 0.02 mSv yr−1 and 0.62 ± 0.02 mSv yr−1, respectively. These values are higher than the 0.1 mSv yr−1 recommended by the World Health Organization and 0.5 mSv yr−1 recommended in the Jordanian standard. However, the measured dose after mixing with surface water has decreased. Filtered tap water is recommended for drinking since the analyzed samples showed extremely low levels of radioactivity.

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