After five days of trying unsuccessfully to clean the green-tinged water at the Maria Lenk Aquatics Center, Rio Olympics officials began Saturday to drain the larger of two pools and refill it with nearly 1 million gallons of clean water from a nearby practice pool.
The transfer, which was expected to take about 10 hours, was scheduled to be completed early Sunday morning, in time for the start of synchronized swimming. The pool had earlier been the site of the water polo competition, which is moving to the larger Olympic Aquatics Stadium.
“Some radical measures are taking place,” Rio Games spokesman Mario Andrada said. “And one of those radical measures is to replace a big part of the water."