I guess I’m doing a rule of three thing right now. I did shelter last week; now I’m tackling water. It wasn’t really intentional, but I was inspired to do this piece today, so I’m going with it. You need water. You can survive around three days without it (technically hydration, in my day to day life I get most of my hydration from coffee), but after a day or so you are not going to be a happy camper. I’m going to go over some of the ways you can make water safe to drink.