constantly updated, a red flag means that swimming is not advisable, a green flag means waters are clean, and a yellow flag suggests using own judgment.  

any of rio's beaches may have polluted waters within 24 to 48 hours following heavy rains - while cleaning is underway, many of ilha do governador's beaches are normally not suitable for swimming.

this link shows  praia do zumbi on a wikimapia.  the link as we present it is best seen using google chrome, as it might not open correctly with other browsers.