Myth 10: Clear water from high elevations is safe to drink.
It does not matter how high the source of water is when it comes to safety. Water can be contaminated by acid rain at the top of a mountain, just as well as it can be polluted in the city .
The bottom line is this: Always purify any water that does not come from a water treatment plant. There is enough information in this discussion to help you access clean water, even when disaster strikes.
Think through the various suggestions and then make a plan that will work for you. Advance preparation is always the best plan for survival.