Eyes go red and stingy after swimming because of urine, not chlorine
The same reaction that causes painful eyes can also create poisonous gases that hurt lungs, hearts and nervous systems, according to the US government
Your support helps us to tell the story
From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.
At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.
The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.
Your support makes all the difference.The red, bloodshot eyes that people get after being in a swimming pool aren’t caused by chlorine, as thought — but by what happens when people urinate in the water.
People weeing in the pool means the urine reacts with chlorine to create a chemical compound that hurts the eyes, according to the US’s Healthy Swimming Program. And those chemicals can also create poisonous gases that can damage lungs, hearts and nervous systems.
“That ‘chlorine’ smell at the pool isn’t actually chlorine,” said Chris Wiant, chair of the US Water Quality and Health Council. “What you smell are chemicals that form when chlorine mixes with pee, sweat and dirt from swimmers’ bodies.”
Experts have pointed out that despite the story told to children that a dye in the water will show if they’ve urinated in the pool — as almost half of Americans believe — it’s actually very difficult to tell when it has happened. In fact, having red eyes are the biggest indicator, according to the National Swimming Pool Foundation.
Weeing into chlorinated swimming pools actually depletes the effect of the chlorine, meaning that more might need to be poured in. And even if it is, chlorine doesn’t get rid of the most common illnesses — many bacteria can continue to live on for days in the pool, once they’re in.
Experts say that bathers and swimmers must be extra careful to ensure that they’re properly washed before they get in, and relieve themselves elsewhere.
“The solution isn’t rocket science; it’s common courtesy,” said Michele Hlavsa, chief of the US Center for Disease Control’s Healthy Swimming Program. “Swimmers should use the pool to swim, the restroom to pee and the showers to wash up before getting in the pool. It’s that simple
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies
Comments