In the context of chemical interaction, what does negative represent in the CSI?

In the context of chemical interaction, specifically related to the Chlorine Stability Index (CSI), a negative value indicates an aggressive state of water. This suggests that the water has the potential to corrode or leach materials, such as metals or concrete, from pool surfaces and equipment. When the CSI is negative, it highlights the need for corrective action to adjust the water chemistry, ensuring it becomes less aggressive and more balanced for long-term use in an aquatic facility.

The term aggressive in water chemistry indicates a higher risk of damage to surfaces and fixtures, which is an important consideration for facility operators when maintaining safe and efficient operations. Understanding this relationship helps in managing water quality and protecting infrastructure in aquatic facilities.