For many reasons both natural and manmade, the power grid could (will more than likely at some point) fail. If this were to occur on a large scale basis and for many days, drinkable water sources may get contaminated and that contamination could come in many forms.
The American Red Cross recommends actions that can be taken to rid water of contamination. See their recommendations here.
One method for treating contaminated water is through distillation. Distillation is essentially removing contaminants from water by capturing water vapor as the water boils. There are a number of ways to do this. As someone who is always on the lookout for common sense off-the-grid living tools, I was intrigued with the *Survival Still and ordered one.
As of the writing of this post, I have not yet received the Survival Still so have not had the opportunity to personally use it and provide comments on my experience. However, my research on the subject showed distillation to be one of the most effective ways of removing all sorts of contaminants. The Survival Still is not the only way to distill water and certainly not the least expensive way. During this National Preparedness Month, we felt it was important to make you aware of distillation so you can do your own research and get prepared.
*We have no connection nor receive any compensation from the Survival Still.