Which of the following can cause skin irritation in pool water?

High levels of chloramines in pool water are a primary factor that can cause skin irritation. Chloramines are formed when chlorine in the pool water combines with organic substances such as sweat, urine, and other contaminants. When the concentration of chloramines builds up, it not only leads to that unpleasant "chlorine smell" often associated with poorly maintained pools, but it can also irritate the skin and eyes of swimmers.

Maintaining proper chlorine levels and ensuring that the pool water is regularly sanitized helps minimize the formation of chloramines, ultimately contributing to a more comfortable swimming experience and reducing the risk of skin irritation. Regular monitoring and proper balancing of pool chemicals are crucial for keeping chloramines at bay and ensuring swimmer safety and comfort.