6. Water treatment - WHO
Water collected from boreholes can have a high concentration of iron (greater than 0.3 mg/l, the WHO guideline value). This can be the result of a naturally high iron content in the soil, or the result of corrosion (from iron pipes, borehole casings and screens). The iron gives the water an unpleasant metallic taste and odour, stains laundry and white
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