Why Did the Olympic Diving Pool Turn Green?

Diving pool green, Olympics diving pool, Maria Lenk Aquatics Center

A general view of the diving pool at Maria Lenk Aquatics Center shows the pool color became discolored on Tuesday. (Getty)

The Olympic diving pool at the Maria Lenk Aquatic Center became discolored during Tuesday’s competition as reported by several outlets.

Several side-by-side comparisons showed the pool’s change in appearance from above and below the surface. In this photo comparison from Deadpsin, the water also appears clouded.

Many are wondering the cause for the discoloration, including Matt Majendie of the London Evening Standard.

Majendie said on Twitter that Olympic officials could not give an answer as to why the water turned green. However, many people have speculated that the change is a result of algae in the water. The pool in Rio is outdoors, which can lead to algae growth. Pool water can turn green when there’s too much algae and not enough chlorine.

“Water tests at Maria Lenk’s Aquatic Park were conducted and there was found to be no risk to the athletes’ health,” an official reportedly said. “We’re investigating what the cause of the situation was, but we are happy to report that the competition was successfully completed.”

The water in diving pools is typically five to ten degrees warmer than the water in pools used for swimming, according to Sports Illustrated. Warmer water is more conducive to algae growth.

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