As much as it rains in Florida, rainwater seeps through the wild and ambles vegetation and leaves, naturally picking up the organic residue. After rain soaks into the aquifer, the organic compounds convert to sulfur. The sulfur is what gives the water its nasty smell compared to rotten eggs.
People Also Ask
As sargassum washes ashore every year in Key West, locals and visitors alike are primarily annoyed by the smell of the sargassum quantity on the beach. This giant blob of seaweed breaks up along the shore to create a mess on public beaches in Monroe County, but there's not too much danger involved.