What is a common sign of improper pool water sanitation?

A strong chemical smell is a common sign of improper pool water sanitation because it often indicates an imbalance in the pool chemicals, particularly chlorine. When the chlorine levels are too low, contaminants like sweat, urine, and organic debris can accumulate and lead to chloramines. Chloramines are compounds formed when chlorine reacts with these contaminants, and they produce a strong, unpleasant odor. This smell is typically mistaken for chlorine itself, but it actually signifies that the water is not being sanitized effectively.

In contrast, clear and sparkling water indicates effective sanitation, as it shows that the water is free from visible contaminants. A stable water temperature generally does not provide insight into the sanitation of the water, nor do balanced pH levels; instead, they contribute to conditions that aid in effective sanitation. Therefore, the presence of a strong chemical smell is a clear warning signal that adjustments in pool sanitization practices are necessary.