on
this link, the institudo estadual do
ambiente (inea)
provides the
suitability of
several beaches on
ilha do governador, including
praia
de são bento, which is close to praia do engenho velho, 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.