What does the presence of chloramines indicate about water quality?

The presence of chloramines in water indicates a combination of chlorinated water reacting with organic matter, such as sweat, urine, and other contaminants. When chlorine is added to water in a pool or spa, it primarily acts as a sanitizer. However, when it reacts with organic materials, it forms chloramines, which are less effective as sanitizers compared to free chlorine.

A high level of chloramines indicates that there are significant organic contaminants in the water, leading to a depletion of available free chlorine, which is necessary for effective sanitation. This situation represents a potential risk for swimmer health and can contribute to unpleasant odors and skin irritation. Therefore, the correct interpretation of chloramine presence is that it reflects both the presence of organics and low levels of effective sanitizer, highlighting the need for water treatment to restore chlorine levels and improve water quality.