Data, maps, and reports are available at the lake-level (Great Lakes), for each state, and for the five-state region as a whole by clicking on the links below: Brief reports that summarize, analyze, ...

The organization has been pushing since 2018 to create high resolution maps of all five Great Lakes bottoms, but that’s a ...

The lakes cover 94,250 square miles (244,106 square kilometers) — an area larger than the state of Kansas ... would allocate ...

The Great Lakes, which span eight states, account for 21 percent of the world's fresh water, and 10 percent of the US population relies on them for drinking water. Lake Superior has seen the most ...

The lakes cover 94,250 square miles (244,106 square kilometers) — an area larger than the state of Kansas ... would allocate $200 million to map the Great Lakes bottoms by 2030.