From what are TTHMs derived?

Total trihalomethanes (TTHMs) are primarily formed as a result of the reaction between organic matter present in water and halogen-based disinfectants such as chlorine and bromine. When chlorine or bromine is added to water to eliminate pathogens, it can react with naturally occurring organic material, such as decaying plant matter and other organic compounds. This chemical reaction leads to the formation of trihalomethanes, which are regulated as they can pose health risks when present in drinking water at high levels.

Focusing on B emphasizes the relationship between organic compounds and halogen disinfectants, which is crucial for understanding how TTHM formation occurs in water treatment processes. This knowledge is essential for water operators in managing and mitigating the levels of these compounds in treated water systems, ensuring compliance with health regulations.