What is the maximum recommended level of cyanuric acid in ppm?

The maximum recommended level of cyanuric acid in pool water is typically around 100 ppm. Cyanuric acid functions as a stabilizer in outdoor pools, helping to protect chlorine from the degrading effects of sunlight. However, maintaining the level within the recommended range is crucial for several reasons.

When cyanuric acid levels exceed 100 ppm, it can lead to reduced chlorine efficacy, making it harder to maintain appropriate sanitation levels. This can complicate water balancing and lead to issues such as algae growth and decreased water clarity. While some sources suggest that levels up to 150 ppm might be tolerable in specific circumstances, staying at or below 100 ppm is generally considered best practice for optimal water chemistry and sanitizer effectiveness. Therefore, the guidance around limiting cyanuric acid to a maximum of 100 ppm is specific to maintaining the right balance for effective disinfection and overall pool health.