Chloramines are toxic and corrosive. That’s correct… that “pool smell” we are all familiar with is actually harmful to our health, and degrades our facilities and equipment.
Fact: Disinfectant by-products (such as chloramines) are inevitable. The only way to stop them is to close the pool. This is a reality of all pools, both indoor and out. Chloramines off-gas from the water and become airborne, where they remain. Once airborne, they are entirely an air issue—water chemistry is irrelevant.
For outdoor pools, airborne chloramines go largely unnoticed because there is plenty of space for them to go. Indoor facilities, however, trap chloramines—resulting in poor air quality. Chloramines are heavier than oxygen, so they stay low in the building, displacing oxygen. Swimmers gasp for air at the waters surface, but instead of breathing the oxygen they need they breathe in chloramine-laden air, which is the reason for “swimmers cough” and “lifeguard lung.” Burning skin, eyes, nose, throat, etc. are just some of the many symptoms that go along with chloramine exposure.