The Dirty Secret of Olympic Swimming: Everyone Pees in the Pool
wsj.com> According to Brian Spear, whose company handled the chemical filtration of the pools used for U.S. Olympic Swim Trials, the potent smell associated with swimming pools is the byproduct of odorless chlorine reacting with organic compounds in the water, like hair or dead skin. Or urine.
Interesting...so if a pool "smells like chlorine," that means it's very dirty?
If a pool smells like chlorine. It means that chemical is doing its job.
But how can you tell that the chlorine has been depleted by doing its job?