Use the computer while you still can, and study up on all the different ways to filter and decontaminate water and different places to find it.

Like what types of different materials natural/manmade to use for filtering.

Or if you are useing bleach/chlorine to decon water how much to use for 5 gallons/1 gallon/2 quart/1 quart so on and so on.

How long do I boil the water for.After it was filtered.

Primitive way of boiling water is to place red hot rocks from fire into a container holding filtered water.