What is the most common method to disinfect pool water?

Chlorination is the most widely used method for disinfecting pool water due to its effectiveness in eliminating harmful microorganisms, such as bacteria and viruses, that can thrive in pool environments. Chlorine, when added to water, forms a variety of compounds that aid in controlling contamination and maintaining water quality.

One of the significant advantages of chlorination is its residual effect; it continues to disinfect the water even after initial addition, providing ongoing protection against pathogens throughout the swimming season. Chlorine is also relatively cost-effective and easily accessible, making it the preferred choice for both residential and commercial swimming pools.

Other disinfection methods like ozonation and ultraviolet light have their uses, often acting as adjuncts to chlorine rather than replacements. These methods may not provide a lasting residual effect, which is crucial for continuously keeping pool water sanitized. Ionization, while an alternative, is less common and not as universally effective as chlorine. Overall, chlorination remains the cornerstone of pool sanitation practices due to its proven reliability and efficiency.