We keep our canals reasonably clean; especially if you're close to one of the inlets of clean water the risks are low from what I understand. In the summer you

We keep our canals reasonably clean; especially if you're close to one of the inlets of clean water the risks are low from what I understand. In the summer you have to watch out for algae etc. But we also keep track of those in official swim water around the canals. And finally I think the risks of swimming in a crowded small official swimming lake can be pretty high as well. But yeah, I'd still think twice before going swimming in a canal and I'd try to keep the water out of my mouth etc.