Background Radon gas is considered as a main risk factor for
lung cancer and found naturally in rock, soil, and water. The objective of this
study was to determine the radon level in the drinking water sources in Nablus
city in order to set up a sound policy on water management in Palestine.
Methods This was a descriptive study carried out in two phases with a random
sampling technique in the second phase. Primarily, samples were taken from 4
wells and 5 springs that supplied Nablus city residents. For each source, 3
samples were taken and each was analyzed in 4 cycles by RAD 7 device manufactured
by Durridge Company. Secondly, from the seven regions of the Nablus city, three
samples were taken from the residential tap water of each region. Regarding the
old city, ten samples were taken. Finally, the mean radon concentration value
for each source was calculated.
Results The mean (range) concentration of radon in the main sources were 6.9
(1.5-23.4) Becquerel/liter (Bq/L). Separately, springs and wells' means were
4.6 Bq/L and 9.5 Bq/L; respectively. For the residential tap water in the 7
regions, the results of the mean (range) concentration values were found to be
1.0 (0.9-1.3) Bq/L. For the old city, the mean (range) concentration values
were 2.3 (0.9-3.9) Bq/L.
Conclusions Except for Al-Badan well, radon concentrations in the wells and
springs were below the United State Environmental Protection Agency maximum
contaminated level (U.S EPA MCL). The level was much lower for tap water.
Although the concentration of radon in the tap water of old city were below the
MCL, it was higher than other regions in the city. Preventive measures and
population awareness on radon's exposure are recommended.
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