A test run for Olympic athletes to familiarize themselves with the marathon swimming course in the Seine River was canceled due to concerns about water quality in the Paris waterway. The decision to cancel the exercise was made by World Aquatics at an early morning meeting. Fluctuating bacteria levels in the long-polluted waterway have been a consistent worry during the Games, with the swimming portion of the triathlon and the marathon swimming events both set to take place in the river.
Another marathon swimming test event is planned for Wednesday, with organizers to decide early that morning whether it will proceed. The women's marathon swim is scheduled for Thursday, followed by the men's race on Friday.
