Fig. 1. A simplified geological map of the area (A brief description of the units is given in Table 1).
Fig. 2. Histograms showing the distribution of uranium concentrations of the 3,820 CGS.
Fig. 3. Spatial distribution of uranium concentrations from 3,820 CGS groundwaters.
Fig. 4. Box plot showing uranium concentration for each geological unit.
Table 1. Descriptions of the 10 geological units
Table 2. Statistical analysis of the uranium concentrations (μg/L) in the CGS groundwaters from different geological units
Table 3. Uranium concentrations in groundwaters from various countries
Table 4. Uranium concentrations in groundwaters from various countries
Table 5. International uranium guidance levels (μg/L) for drinking water
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