They have said repeatedly the water is safe despite being filled with floating rubbish and untreated sewage that gushes down gullies from hillside favelas .
Such a move would be an embarrassment to local organisers and the International Olympic Committee .
organisers have said repeatedly the water is safe despite being filled with floating rubbish and untreated sewage that gushes down gullies from hillside favelas .
Such a move would be an embarrassment to local organisers and the International Olympic Committee .