on
this link, the institudo estadual do ambiente -
inea provides the
suitability of several beaches, including
the beaches or the
zona oeste and
sepetiba bay.
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.