Water Supply of the World
The Antarctic Icecap is the largest supply of fresh water,
representing nearly 2% of the world's total of fresh and salt water. As
can be seen from the table below, the amount of water in our atmosphere
is over 10 times as much as the water in all the rivers taken together.
The fresh water actually available for human use in lakes and rivers and
the accessible ground water amount to only about one-third of 1% of the
world's total water supply.
||Surface area (sq mi)
||Volume (cu mi)
||Percentage of total1
| The oceans
| Inland seas and saline
| Freshwater lakes
| All rivers (average level)
| Antarctic Icecap
| Arctic Icecap and glaciers
| Water in the atmosphere
| Ground water within
a mile from surface
| Deep-lying ground water
1. All figures are estimated.
Source: Department of the Interior,
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