Is niagara falls in Canada is it surface water or underground water?

Niagara Falls is located on the border between the United States and Canada, with the majority of the falls being in Canada. The water that flows over Niagara Falls comes from Lake Erie, which is fed by several rivers, including the Detroit River, the Niagara River, and the St. Clair River. The water that flows over Niagara Falls is surface water, meaning that it is water that is on the surface of the earth. Groundwater is water that is found beneath the surface of the earth, and it is not the source of the water that flows over Niagara Falls.