Virtually none. Ever fresh rainwater or snow has dissolved impurities in it.
69%
The percentage of pure clean water is only 1% among all kinds.
About 80% of water
3%
three percent of all the earths water is fresh water
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5%
Less than 3%
The percentage of pure water in ocean water is 96.5%
97% is all salt water and 3% is water used by people.
The largest percentage of the earths surface is covered by water mainly the Oceans (about 71%).
three percent of all the earths water is fresh water