> It’s fairly standard practice for triathlons to dump a whole bunch of bleach into a lake or river to make it safe to swim I'm not sure where this might be st

> It’s fairly standard practice for triathlons to dump a whole bunch of bleach into a lake or river to make it safe to swim I'm not sure where this might be standard practice, but this would be very illegal in most of Europe. So that's not what is going to be done (as explained in the article).