on
this link, the institudo estadual do
ambiente (inea)
provides the
suitability of
several beaches on
ilha do governador, including
praia da bandeira,
which is close to praia da bandeira and can be used to guess
water quality.
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.