How Much Water is There?
The Earth's surface consists of approximately 70% water! The oceans (salt water) account for 97.5% of this water, while the other 2.5% is considered freshwater. The 2.5% freshwater is found in glaciers(~30.9%), snow and ice (~68.7%), lakes and rivers (~0.4%). The diagram below illustrates the above percentages.
When you consider that 70% of the Earth's surface is water, only approximately 0.01% of this water is readily available for use by humans! There is a lot of water available, but the vast majority of it is saline water (oceans), which is not fit for use.