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The to your question depends on what you mean by "dirty". Water can contain a great number of contaminants from chemical to biological.

In the case of something like stream water or lake water, for example, filtering through a clean paper or cloth filter, followed by boiling at a full boil for at least one minute. Many people say 5, 10, 20 minutes. 1 minute is more than enough.

Water can also be disinfected with small amounts of household bleach (plain, unscented). Use about 8 drops of bleach per gallon of water. Stir and let it sit for 30 minutes. This will kill off bacteria, viruses, and parasitic worms.

Iodine has been used for many years to disinfect water, though the taste is less than pleasant. In many countries with poor tap water, iodine is used to disinfect water used for cleaning vegetables and fruits.

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10y ago

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