Harvard Health Tips

Purifying water

When the water supply is questionable, boiling is by far the most reliable method to make water safe to drink. Water should be brought to a vigorous rolling boil for one full minute and then allowed to cool to room temperature. Do not add ice, which could reintroduce harmful organisms to the water you?ve just purified. At high altitudes (above 6,562 ft), boil water for a full three minutes.…

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