Q » Why can pre-chlorination sometimes increase trihalomethanes (THMs)?

03 Nov, 2025

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A » Pre-chlorination can increase trihalomethanes (THMs) because chlorine reacts with natural organic matter present in the water. This reaction forms THMs as byproducts, particularly when the organic content is high. The process is often temperature and pH-dependent, leading to varying THM concentrations. Therefore, careful management of chlorine dosing and alternative disinfection methods are essential to minimize THM formation while ensuring effective water purification.

Michael

03 Nov, 2025

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A »Pre-chlorination can increase trihalomethanes (THMs) because it allows chlorine to react with organic matter in the water for a longer period, forming more THMs. This occurs when chlorine is added early in the treatment process, giving it more time to react with precursors, resulting in higher THM concentrations.

David

03 Nov, 2025

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