Table 1 Some international studies that were carried out on different water sources and their measured radon concentration levels
From: Exposure assessment of radon in the drinking water supplies: a descriptive study in Palestine
Country | Water source | Radon concentration | Reference | Notes |
|---|---|---|---|---|
United Kingdom | Tap water | 1-2 Bq/L (range) | [9] | The mean radon level was below 11 Bq/L which is the safe level approved by the United States Environmental Protection Agency (U.S EPA) [10]. |
Finland | Drill Wells | 130 Bq/L (mean) | [11] | Aimed to find if there is a relationship between radon from ingestion of water and stomach cancers. The risk for stomach cancer from radon was 0.69 (not significant). |
Italy | Ground water/Volcanic area | 1.8-52.7 Bq/L (range) | [12] | About 40% of the samples (n = 119) exceeded the maximum contaminant level of 11 Bq/L proposed by the U.S EPA. |