Now days water pollution is major health issue. Water tainted(polluted) by lead, sulphate,murcury, arsenic, cadmium,fluride, uranium.but chromic effect of some element still unknown .high rate of chromic kidney disease (CKD), tooth decay, flurosis, blue baby syndrome, black foot disease, itai itai disease, so much increased . A few small animal and human studies have found that havey metal demage kidney. Some internationl standard of WHO of drinking water is given.so use carefully.
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