The Great Lakes contain about 20% of the U.S.'s fresh water, making them a vital resource for the country.

The Great Lakes hold approximately 20% of the U.S. fresh water, making them an essential natural resource for millions of people in the surrounding regions. This vast supply of fresh water supports agriculture, industry, and drinking water needs for both the United States and Canada. The Great Lakes are the largest surface freshwater system in the world by total area, and their water plays a critical role in the ecology, economy, and climate of the Great Lakes Basin. Protecting the health of these lakes is crucial, as they sustain diverse ecosystems and human populations across several states and provinces.