Water near base of Niagara Falls turns alarming shade of black as tourists look on

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Water near the base of Niagara Falls turned an alarming shade of black before watching tourists – raising fears of an oil leak.

However the water board for the city of Niagara Falls, New York, said the weekend discharge was part of routine maintenance of one of its basins.

Video taken from a helicopter shows black-coloured water along the Niagara River’s US shoreline below the falls that border the country and Canada.

The inky water enveloped the dock for the popular Maid of the Mist tour boats.

Officials said the blackish water contained accumulated solids and carbon residue but no organic oils or solvents.

The black water had dissipated by Sunday.

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