The Associated Press has published a multi-format package looking at the unhealthy conditions of the waters that will be used by nearly 1,400 athletes for swimming and boating events at the 2016 Olympics in Rio de Janeiro. It is based on a five-month investigation by the AP and comprehensive, multiple tests it commissioned on viral and bacterial contamination at the Olympic sites for the first time.
Water pollution is a top concern in Brazil. Most sewage isn't collected, let alone treated in the urban areas. In Rio, much of the waste runs through open-air ditches to fetid streams and rivers that feed the Olympic water sites and blight the city's picture postcard beaches.