Here's a breakdown:

* Oceans: Hold about 96.5% of all water on Earth.

* Glaciers and Ice Caps: Contain about 1.7% of Earth's water.

* Groundwater: Makes up about 1.7% of Earth's water.

* Lakes and Rivers: Contain a very small percentage of Earth's water (less than 1%).

* Atmosphere: Contains a very small percentage of Earth's water (less than 1%).

While glaciers, groundwater, and other sources are important, the vast majority of water on Earth is stored in the oceans.