Why is Niagara water so blue?

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.



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People do not recommend swimming in the Niagara River, nor is it allowed in most areas. The river has strong currents, turbulent rapids, and unpredictable undertows, especially in the Lower Niagara River below Niagara Falls.

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The verdant green color of the water flowing over Niagara Falls is a byproduct of the estimated 60 tonnes/minute of dissolved salts and rock flour (very finely ground rock) generated by the erosive force of the Niagara River.

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An estimated 60 tons of dissolved minerals are swept over Niagara Falls every minute. The colour comes from the dissolved salts and “rock flour”, very finely ground rock, picked up primarily from the limestone bed but probably also from the shales and sandstones under the limestone cap at the Falls.

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Queen's Royal Beach is the only public swimming beach on the Niagara River, located in the Town of Niagara-on-the-Lake at the foot of King Street.

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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.

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Niagara Falls Facts The sound of the Falls has been described as thunder, and is caused by air bubbles breaking as they are slammed up and out of the water. The plunge pool beneath the falls is 35m(100 feet) deep. It is estimated that Niagara Falls erodes at the rate of 1foot per year.

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Yes, Niagara Falls is a generally safe place to visit. While there is crime in the area, it is not significantly higher than most other tourist cities in the United States.

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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.

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The electricity off the falls is so powerful that even through the mist every tourist has hairs that stick up except the pack of Buddhist monks who have shaved heads.

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As of March 2023, the Beach Closings Beneficial Use Impairment (BUI) is officially changed to 'Not Impaired' in the Niagara River. The BUI status change is a tremendous achievement for the entire region and signals improved environmental conditions thanks to many collaborative actions.

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There are actually three falls; the American and Bridal Veil Falls and the Canadian Horseshoe Falls. The U.S. owns the first two and the Canadian Horseshoe Falls is owned by Canada. Ten percent of the Niagara River flows over the American and Bridal Veil Falls and the remaining 90% over the Canadian Horseshoe Falls.

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Back in 1969, the Falls were “turned off.” Here's why and how it happened. Niagara Falls thrills visitors with a constant flow of wonder, but have you ever imagined a time when the Falls were not technically … the Falls?

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It's always free to walk into Niagara Falls State Park to see the Falls, and it's open 365 days a year! What many people are happy to discover, however, is that along with this majestic natural wonder, the Niagara Falls tours and activities that you can enjoy inside the park provide hours of added fun!

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