The Great Lakes hold approximately 18% of the world's fresh surface water, making them a critical global resource.

The Great Lakes contain around 18% of the world's fresh surface water, making them one of the largest and most vital freshwater systems on the planet. This vast supply of water supports millions of people in the U.S. and Canada, providing drinking water, agricultural irrigation, and industrial use. The Great Lakes’ importance extends beyond human needs, sustaining diverse ecosystems and wildlife. Given their size and impact, these lakes are a crucial environmental and economic resource, highlighting the importance of their conservation to ensure the long-term availability of fresh water for future generations.