What percentage of water on earth is fit for consumption? 

0.006%

The correct answer is option 1. 0.006%.

The majority of the water on earth is unfit for human consumption. Seawater and ocean water are too salty to drink. Even the majority of fresh water is frozen as ice in the arctic regions and glaciers. We therefore only have a small amount of water—about 0.006%—from lakes, rivers, and underground.