Purified water has been treated with distillation, ion-exchange, reverse osmosis, or another similar process. Distilled water comes from the steam of municipal water that has been boiled. Short of testing it yourself, there's no way to guarantee that your bottled water is free of contaminants. Their plants are open to unannounced inspections by NSF International, an independent certification agency . Top A lot can happen on the way to the tap or bottle.
Water can pick up healthy minerals like magnesium and calcium as it travels through rock formations.
It can become laced with pesticides that are washed into rivers and streams. The chlorine that's used to disinfect it can react with decaying leaves to form toxic byproducts. And even the purest water can become contaminated with lead from the pipes in your home. But even when water meets all regulations, it still may not be suitable for everyone to drink. On the whole, Americans have good clean drinking water.