Approximately what percentage of the Great Lakes water is contained in Lake Ontario?

Lake Ontario contains approximately 1% of the total volume of water in the Great Lakes. Although it is the smallest of the five Great Lakes by surface area and volume, it plays a crucial role in the Great Lakes system. The Great Lakes collectively hold about 20% of the world's freshwater, and each lake contributes to this vast system in different capacities.

Typically, the volume distribution among the lakes shows that Lake Superior has the largest volume, followed by Lake Michigan, Lake Huron, Lake Erie, and lastly Lake Ontario. The water volume in Lake Ontario is significantly less compared to its neighbors, which is why the percentage is closer to 1%.