What does a consistently low ORP level indicate in a pool?

A consistently low ORP (Oxidation-Reduction Potential) level in a pool indicates a need for chlorine adjustment. ORP is a measure of the overall sanitizing power of the pool water, reflecting the effectiveness of disinfectants like chlorine in killing pathogens and breaking down contaminants.

When ORP levels are low, it usually means that there is not enough available sanitizer in the water to maintain a safe environment for swimmers. This can occur if the chlorine level is insufficient, often due to factors such as high bather load, organic contamination, or insufficient chlorine addition. Maintaining appropriate ORP levels is crucial because they provide a direct insight into the water's ability to sanitize effectively.

Therefore, a low ORP level serves as a clear signal to take action regarding chlorine levels to ensure that the pool remains safe and clean for users.