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How long is it safe to keep... | Almanac.com

How long is it safe to keep...

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How long is it safe to keep unrefrigerated, stored tap water for drinking?
If you stored the water in a safe container (one not contaminated by any other foreign substance!) your tap water will be fine for up to six months. However, it may taste bad after that long. To improve the taste, add oxygen by pouring it back and forth from one container to another several times.

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