The AP commissioned tests over a five-month period. Experts who reviewed the results found that not a single venue is fit for swimming or even boating.
Brazil is touted as one of the most racially harmonious places in the world, but people of color who move there say they are surprised at the degree of discrimination they face based on skin color.
Brazil is hosting not just the Olympics in 2016 but also the Paralympics. And activists for the disabled say Rio de Janeiro has a long and potholed road ahead of it to get ready for the games.
One of the top schools competing in the Carnival parade received $3.5 million from Equatorial Guinea, sparking outrage in Brazil. The move puts a spotlight on Carnival's questionable sponsorships.
The visit by Pope Francis was marred by security lapses, traffic chaos and other logistical snafus. The event, World Youth Day, was seen as a test for Rio, which hosts the World Cup next year and the summer Olympics in 2016.