Cyanuric acid (CYA) is a chemical compound used in swimming pools to stabilize chlorine and protect it from degradation by sunlight. Adding CYA to a pool increases its concentration, thus extending the life and effectiveness of chlorine as a sanitizer. For example, if a pools CYA level is too low, chlorine will dissipate rapidly, requiring frequent additions and potentially leading to inadequate sanitation.
Maintaining the appropriate CYA level is crucial for effective pool sanitation and minimizing chlorine consumption. Without sufficient CYA, chlorine is quickly broken down by ultraviolet rays, rendering it ineffective in killing algae and bacteria. Historically, CYA became widely used as pool owners and professionals recognized the cost savings and improved water quality that resulted from its chlorine-stabilizing properties.