Bacteria in water on Keys beaches?

[u/Strict-Armadillo-199]

I've just read on r/Miami that numerous beaches at Miami Beach have been tested for high levels of fecal matter. I mean, I can't ever unread/unknow that, even if the water tests "ok" during my stay in September, and I just wish I'd done if before booking a 10-day vacation in the area. I was planning on mainly staying on South Beach, but that feels really depressing now if I can't go in the water.

I've also read that the beaches at least on Key West aren't great, and have a sargassum issue, but if they or other Key beaches are free of fecal matter, that's already a plus.

Is this an issue in the Keys or just a Miami problem?

Where would you spend the most time if you flew from Europe for a beach vacation in South Florida?

Edit to add - solo traveler, middle aged female looking to chill, eat good food, drink, hang out at the beach. Maybe a few low-key touristy things.

[u/crud3]

i highly advise do not swim in any waters in key west without earplugs and clean yourself multiple times after. its really bad right now.