I can’t overestimate the importance of water. Most people can only live about 3 days without it (at most) and death by dehydration is extremely miserable. If you’re preparing for a catastrophe, water should be a top priority. So here are two videos I found helpful.
The first video I want to share is from The Pathfinder School, “The Premier School for Wilderness Self Reliance.” You can see their videos at youtube.com/user/wildernessoutfitters. The narrator begins discussing water at about 1:23 into the video.
This next video is about more methods and products used to purify water. There are many ways to purify water, and these are just a few examples.