http://www.shtfpreparedness.com/8-fastest-ways-purify-water/

When your mouth is bone dry and your body is dehydrated, you don’t want to wait around for water to go through the purification process. You want a drink right now. Besides, if you’re on the move, you might not have time to make a water filter from scratch or wait for a solar still to do its thing. And water that hasn’t been purified is a very serious risk. So how can you get clean drinking water in a hurry?

Here are the 8 fastest ways to purify water, starting with the slowest of the 8:

1. Household bleach

Household bleach (regular unscented) can purify water in 30 minutes. A gallon of water with low turbidity can be purified with only 8 drops (or 1/8 teaspoon) of bleach. Cloudy water takes 16 drops (or 1/4 teaspoon). Once you’ve added the bleach, gently swirl it around. Let it sit for half and hour, then sniff it. If you can smell a bit of chlorine, the water is ready to drink. If not, then repeat the process.

Bleach

Keep in mind that bleach is only an effective option if it hasn’t expired. Be sure to check the best by date on the bleach bottle before using this method because bleach begins to lose its potency after only 6 months. Also, it will not remove chemical contaminants or metals.

2. Iodine

Iodine is similar to household bleach except you need twice as many drops to purify the water. Iodine can sit on a shelf for a year without losing potency, as long as it is stored out of direct light. Anybody who is allergic to shellfish will likely be allergic to iodine. However, if you get the kind that came from minerals and not shellfish (like the kind I linked to), it has no expiration date and shouldn’t be a problem for people with shellfish allergies. But either way, pregnant or nursing women are not advised to drink water treated with iodine.

read more at http://www.shtfpreparedness.com/8-fastest-ways-purify-water/