We know that the Great Lakes are one interconnected watershed, with thousands of rivers and streams draining into the lakes. We can see these surface waters and understand their immensity and flows. What about the vast system of water under the Great Lakes known as groundwater?
The Great Lakes basin is one of the most bestowed with respect to water availability. However, only 1 percent of the available freshwater is renewed annually.
The purpose of this Annex is to contribute to the achievement of the General and Specific Objectives of this Agreement by coordinating groundwater science and management actions.