Figure 2. Present situation of tube-well floor in Tangail district, Bangladesh (yellowish color of generally indicated the presence of iron)

From

An Apportionment of Arsenic and Iron Contamination of Tube-well Groundwater with Possible Health Risk in Bangladesh

Ram Proshad, Tapos Kormoker, Md. Saiful Islam, Bidhan Chandra Saha, Md. Ripon Hossain, Mahamud Hasan Prince, Mohammed Mahmud Khan

Journal of Environment Pollution and Human Health. 2017, 5(3), 117-123 doi:10.12691/jephh-5-3-7