Four of the five Great Lakes (Superior, Michigan, Huron, and Erie) drain into the Niagara River before emptying into Lake Ontario. These five Great Lakes make up almost one-fifth of the world's fresh water supply.
The river cuts through sandstones, limestones and some dolostones. But the culprit for the beautiful blue is the limestone! Limestone is composed primarily of calcium carbonate (CaCO3) and is white in color. As the river breaks down this rock into tiny crystals, these crystals will get mixed up into the water.
From trophy trout and salmon to smallmouth bass and walleye, every species of fish that swims in the Great Lakes can be found in the waters around Niagara Falls USA. Book a charter, find a scenic stretch of shore or sign up for a derby — you're sure to find your own perfect watering hole.
Under an international treaty, the flow of water over Niagara Falls is reduced during the night to allow more of the water to flow into intakes used for power generation. This plan ensures that the Falls' natural beauty remains unaffected during prime viewing hours.