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Statistical analysis of arsenic contamination in drinking water in a city of Iran and its modeling using GIS

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In this research, probable arsenic contamination in drinking water in the city of Ardabil was studied in 163 samples during four seasons. In each season, sampling was carried out randomly in the study area. Results were analyzed statistically applying SPSS 19 software, and the data was also modeled by Arc GIS 10.1 software. The maximum permissible arsenic concentration in drinking water defined by the World Health Organization and Iranian national standard is 10 μg/L. Statistical analysis showed 75, 88, 47, and 69% of samples in autumn, winter, spring, and summer, respectively, had concentrations higher than the national standard. The mean concentrations of arsenic in autumn, winter, spring, and summer were 19.89, 15.9, 10.87, and 14.6 μg/L, respectively, and the overall average in all samples through the year was 15.32 μg/L. Although GIS outputs indicated that the concentration distribution profiles changed in four consecutive seasons, variance analysis of the results showed that statistically there is no significant difference in arsenic levels in four seasons.

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This research was supported by Tehran University of Medical Sciences as a part of Ph.D. dissertation (Grant No: 92-02-46-23886). The authors are grateful to all stuffs especially Mr.

Pourakbar from Laboratory of the Faculty of Health Science in Tabriz University of Medical Sciences for their all assistances.

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Correspondence to Simin Nasseri.

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Sadeghi, F., Nasseri, S., Mosaferi, M. et al. Statistical analysis of arsenic contamination in drinking water in a city of Iran and its modeling using GIS. Environ Monit Assess 189, 230 (2017).

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