It is interesting and quite shocking to note that only 0.37% of the Earth's water is drinkable.

Freshwater

This may come as a surprise for many because water makes up seventy-percent of the Earth's surface. However, despite the fact that three-fourths of the Earth is made up of water, only 2.5% of this is freshwater, while the rest is in the form of sea water, and is therefore not suitable for drinking.

Furthermore, of the 2.5% freshwater supply we have, the majority or 66.67% of this is in the form of ice caps or glaciers, which means that most of this is not available for human consumption.

The Earth's freshwater supply is in the form of groundwater, which is essentially water found below the ground, that goes up to the surface, flowing to streams and other water bodies.

Drinking Water and Sanitation

Out of the 0.37% of water that is drinkable, most developing countries do not have the money and resources to provide drinkable water that is safe and clean to its people.

According to the UNICEF and the World Health Organization's 2008 Report on the Progress on Drinking Water and Sanitation, there are 884 million people who do not have access to safe water supplies. This translates to about 1/8^th of the world's total population.

A Cause for Concern

The low rate of drinking water on Earth is a major issue that is recognized by organizations like the World Health Organization (WHO) and the United Nations Development Programme (UNDP).

Water is a basic and essential need for the survival of all forms of life on our planet. According to Water.org, a non-profit organization based in the United States which promotes aims to provide potable water to developing countries, 3.575 million people die every year from diseases resulting from unsafe drinking water.