Arsenic concentration in groundwater of Uttar Pradesh shown by red, green, and blue circles. The places marked in green are bad, and those in red are dangerous. For arsenic in drinking water, the permissible and acceptable limits are 0.01 mg/l and 0.05 mg/l, respectively. It is difficult to remove it from water. Thus 0.01mg/l level is regarded as “lower[Read More...]
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