Here's a convincing argument for chlorine-free pools: Children who spent more than 100 hours swimming in chlorinated pools are up to six times at risk of having asthma and allergies as other teens. "There is little doubt that pool chlorine is an important factor implicated in the epidemic of allergic diseases affecting the westernized world," said head researcher Alfred Bernard. According to Bernard, chlorine in swimming pools affects children's respiratory health more than secondhand smoke.
The study surveyed 814 teens ages 13 to 18 before arriving at the surprising (to this writer) conclusion. Researchers speculate toxic chemicals in the water and hovering in the air promote respiratory allergies. No coincidence that the most cases of asthma are in the countries with the most swimming pools. Learn more about switching to a self-cleaning chlorine-free pool.