Manage chloramine buildup and indoor air quality at an indoor pool

Steps

1. Monitor combined chlorine regularly as the primary chemical proxy for chloramine buildup, taking action when it reaches or exceeds roughly 0.4 ppm (a threshold widely referenced in MAHC-derived code language — confirm the exact number adopted locally).
2. Address elevated combined chlorine with breakpoint chlorination rather than reducing sanitizer, since the strong 'chlorine smell' associated with poor indoor air quality is caused by chloramines, not excess free chlorine.
3. Verify source-capture or general ventilation over the water surface is functioning as designed; chemistry fixes alone cannot compensate for inadequate air handling.
4. Consider secondary disinfection (UV or ozone) to help break down combined chlorine and reduce chloramine formation, particularly for venues with heavy bather load.
5. If patrons or staff report eye/respiratory irritation, escalate to air-quality testing (e.g., for trichloramine) and involve facility management/HVAC expertise rather than treating it purely as a pool-chemistry issue.