Most of the fresh water in the world is locked away in remote and unusable places. A lot of it is in Antarctica, frozen into ice sheets 1.6km deep. The Antarctic ice sheet alone accounts for 61% of the world's fresh water.
The next largest source of fresh water is the ground. Normally, groundwater is thought to only include well water or water in aquifers; however, it also includes water that is in the form of soil moisture, swamps, or permafrost.
Surprisingly, only 0.3% of all fresh water in the world is found in lakes and rivers.
Source: Environment Canada