Which disinfection method limits HAA5 formation?

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Multiple Choice

Which disinfection method limits HAA5 formation?

Explanation:
HAA5 form when chlorine reacts with natural organic matter in the water. Using chloramines as the disinfectant reduces this pathway because chloramines are weaker oxidants and react more slowly with organic matter, so far fewer haloacetic acids are produced. This makes chloramination the best way among common disinfection methods to limit HAA5 formation. Chlorination tends to generate more HAA5 due to the abundant free chlorine reacting with organics, while chlorine dioxide and ozonation form different byproducts and do not drive HAA5 formation in the same way.

HAA5 form when chlorine reacts with natural organic matter in the water. Using chloramines as the disinfectant reduces this pathway because chloramines are weaker oxidants and react more slowly with organic matter, so far fewer haloacetic acids are produced. This makes chloramination the best way among common disinfection methods to limit HAA5 formation. Chlorination tends to generate more HAA5 due to the abundant free chlorine reacting with organics, while chlorine dioxide and ozonation form different byproducts and do not drive HAA5 formation in the same way.

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