Venice Canal Turns Green And The Mystery Is Solved

Investigators were on the case when the Grand Canal became fluorescent green overnight.
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The neon-green water that mysteriously flowed in Venice’s Grand Canal over the weekend was caused by fluorescein ― a chemical used to detect underwater structural leaks, CNN reported Tuesday.

But the culprit behind the dye remains a mystery. The Regional Agency for the Environment in Venice said the coloring was likely intentional because the amount was too large to be an accidental spill, according to the news network.

The Grand Canal turned bright green near the Rialto Bridge in Venice, Italy on May 28, 2023.
The Grand Canal turned bright green near the Rialto Bridge in Venice, Italy on May 28, 2023.
Anadolu Agency via Getty Images

Officials are pursuing several leads, including the possibility of environmental activism, Venice police told CNN.

The phosphorescent green was noticed spreading Sunday near the arched Rialto Bridge, according to The Associated Press. Luca Zaia, the governor of the Veneto region, inspired curiosity by posting a photo of the water after it was reported by residents, the wire service wrote.

Gondolas navigate by the Rialto Bridge on Venice's historical Grand Canal as a patch of phosphorescent green liquid spreads in it.
Gondolas navigate by the Rialto Bridge on Venice's historical Grand Canal as a patch of phosphorescent green liquid spreads in it.
via Associated Press

NPR noted that the contamination coincided suspiciously with an annual rowing race that “aims to celebrate the Venetian lagoon environment as well as to protest wave motion from excessive motorboat traffic that riles the city.”

The canal has been tinted in the past to make a statement.

In 1968, eco-artist Nicolas Garcia Uriburu used fluorescein to turn the Grand Canal green to “promote environmental awareness,” NPR wrote.

A bright patch of green is seen in the Grand Canal along an embankment lined with restaurants, in Venice, Italy.
A bright patch of green is seen in the Grand Canal along an embankment lined with restaurants, in Venice, Italy.
via Associated Press
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