Survival skills can save your life in an emergency. Prepare yourself for not having access to clean water by learning to distill dirty water.
Distilled water isn't safe to drink for long periods, which means you should only drink it in an emergency. If you're in the wild and have limited drinking water, distilling your own water can save you from using drinking water for things like washing clothes or rinsing off camping gear. Instructables user Ludvic has provided a how-to for making it.
All you need is a large pot, a bowl that can fit inside, and a heat source. From there you just put the water in the pot, place the bowl inside the pot, and put the whole setup on the heat source, which could be a stove or camp fire. What happens is the steam from the dirty water will stick to the cold pot cap, and drip into the clean bowl. Ludvic's method uses ice to cool the pot lid so the clean water condenses on the lid and drips into the bowl faster, but you really just need some place for the whole thing to cool and a good seal so your steam doesn't escape. Check the video above to see how it's done, and the link below for the step-by-step.
How To Clean And Distill Dirty Water [Instructables]