What percent of the earth's fresh water is groundwater?

The total volume of water on Earth is about 1.4 billion cubic kilometers, around 41 million of which is fresh water.

3 percent of the world's water is fresh, however only 0.768% is usable for consumption. The remaining portion of fresh water is locked up in glaciers, permanent snow fields, the Arctic, Antarctica, the atmosphere, living organisms (plants and animals) or is polluted. As well, there is 97% salt water located on Earth; and through human activities this is limiting the supply of safe drinking water! We need to sustain our water supply for further/future generations.