constantly updated, the red flags mean that swimming is not advisable, green flags mean waters are clean, and yellow flags suggest using own judgment - any of rio's beaches may have polluted waters within 24 to 48 hours following heavy rains. 

visitors interested in entering this or other areas of environmental protection, wild beaches, or any other region where nature is more present than humans, should read the rules of conduct, as prepared by the ministry of the environment of brazil and posted on this page.