I'm with Rebel Heart! I need to swim two or three times a day. Luckily, the waters here on the Isle of Long are pretty clean. Though a good fresh water rinse is what I do too. Can't be salty all the time!
Hell, they have swims around Manhattan Island in New York
City two or three times a year. That certainly is an Urban area. They don't stop them.
If the clammers are clamming then I'm swimming. As soon as the water hits 60 degrees F I'm in. I swim until mid October. I thought I was doing He Man good until I saw this:
Any petite Asian woman who takes a dip in Glouster Harbor in November is a woman to be recokoned with. I don't feel too bad as she also swims with the Polar Bears off Coney Island too!
But, I think there are more serious hazards than we really know too. A few years ago I was swimming in Hadley Harbor near Marthas Vineyard wearing a flowing oversized T shirt. Something came up from below and pinched me around the stomach. I just felt it never saw what did it. I thought it might have been an aggressive Bluefish. Fast foward the next year and there are news reports of a Great White which was trapped by the tides in a nearby cove. Seems the area is sometimes used as a nursery/birthing area for the Whites. Doh! The flowing T shirt must have looked like the mutalated carcus of a fish
from the perspective of some baby Great White down below. At least I hope it was a baby Great White.