A black stain appears on the Niagaraão River, tourists (Photo/Video) marvel

A black spot is seen near the Niagaraão waterway base, and this had alarmed tourists after a plant treating their waste water was fired.

The water board for the city of Niagara Falls, and New York, said the dismissal of the campaign on Saturday was part of the routine maintenance of one of its ponds.

A video commissioned by a helicopter showed black water along the coast of the Niagara River, reports British medium “Metro”, Periscopi broadcast.

At first, it looked like a shadow to Pat Proctor, who observed that it grew in large measure, about 4:15 a.m. on Saturday. The first thing that came to mind was: Dear God, please don't create an oil leak”, said the company's vice president who cared for tourist navigation./Periscopi/