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How do I desalinate seawater?

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I know I shouldn't drink seawater (because of the salt it contains), but how can I desalinate it?

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This post was sourced from https://outdoors.stackexchange.com/q/268. It is licensed under CC BY-SA 3.0.

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You need to distill it - I'm assuming that freezing is not an option (unless you're camping in the extreme latitudes). This is easiest, as the ice on top is almost pure water.

Where you don't have a freezer available - boiling the water, capturing the steam and condensing it back to water will provide pure water.

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Outdoors you can dig a hole and build SOLAR STILL. It is quick and dirty but works very well and it is time tested.

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Or you can put big plastic bag over brach with a lot of leaves on it and put rock on the bottom to capture the water. Make sure you don't do it on foliage that is toxic to people.

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If you have the bucks you could get a portable Reverse osmosis filter.

Electrolysis turns the salt water into oxygen and hydrogen then recombine them and the result is pure water.

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