But... No matter what they say about bacteria measurements and other high quality quantitative indicators, there will still be swimming bags of potato chips and cigarette cartons and beer cans and receipts, and all the other junk Parisians tend to toss in there, even the occasional Vélib' bicycle. The thought of going for a nice swim only to whack my foot on a rusted underwater bicycle gear and then leave the water with a sandwich wrapper clinging to my back isn't very appealing. So I wonder how this will be managed, and how separated the three proposed swimming spots will be.
With that said, I went swimming in the Ohio River as a child, and I guess I'm still alive, so ¯ \ _ ( ツ ) _ / ¯