Why Do Your Eyes Really Sting in the Pool? - Video

That sting in your eyes at the pool is not just the chlorine's fault.
In 2017, scientists in Canada went looking for something hidden in pools and hot tubs, using a clever trick to track it. What they found in every single one, and how much of it was in one big pool, explains the sting and that strong pool smell.

Sources:
Jmaiff Blackstock et al., "Sweetened Swimming Pools and Hot Tubs," Environmental Science & Technology Letters (2017)
CDC Healthy Swimming: chloramines

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