Indoor pools offer year-round swimming and protection from the elements, but beneath the surface, they can come with hidden health risks that many swimmers overlook.
One of the biggest concerns is poor air quality caused by chloramines, chemical by-products that form when chlorine reacts with sweat, urine, and skin cells. While chlorine is essential for disinfecting pool water, chloramines are released into the air, especially in enclosed, poorly ventilated spaces. These airborne irritants can trigger “chlorine cough,” wheezing, sore throats, red eyes, and even aggravate asthma or other respiratory conditions. Lifeguards, frequent swimmers, and children are especially at risk due to prolonged exposure.
Another hidden hazard is microbial contamination. Despite regular chlorination, some pathogens—like Cryptosporidium or Legionella—can survive in pool environments and spread through water droplets or improperly maintained systems. Indoor pools with high humidity and warm air can become breeding grounds for mold and bacteria, especially around vents, locker rooms, and on pool decks.
Skin and eye irritation is also more common indoors. Prolonged exposure to chlorinated water, combined with dry, recycled air, can strip the natural oils from your skin and exacerbate conditions such as eczema or dermatitis. Chloramines in the air may also cause red, burning eyes that persist after swimming.
Additionally, indoor pools often rely on heating and ventilation systems to manage temperature and humidity. If these systems are outdated or poorly maintained, excess moisture can lead to structural damage, mold growth, and long-term air quality issues, even for those who aren’t swimming.
To stay safe, choose facilities that emphasize ventilation, regular maintenance, and strict hygiene protocols. And remember: just because a pool looks clean doesn’t mean it’s free from hidden dangers. Ask questions, observe conditions, and always rinse before and after your swim.