TTHMs are produced as a result of reactions between chlorine and what?

TTHMs, or trihalomethanes, are byproducts formed when chlorine, a common disinfectant used in water treatment, reacts with naturally occurring organic materials in water, such as humic and fulvic acids. These organic materials often come from the decomposition of plant and animal matter and can vary significantly depending on the source and composition of the water.

When chlorine is added to water containing these organic compounds, a chemical reaction occurs that can lead to the formation of TTHMs. This process is a concern for drinking water quality because TTHMs have been associated with potential health risks if consumed in high concentrations over long periods.

While inorganic materials and heavy metals may be present in water, they do not typically contribute to the formation of TTHMs. Similarly, while additional chlorine compounds may interact in water treatment, they are not the primary reactants leading to TTHM formation. Therefore, the interaction between chlorine and naturally occurring organic material is the key factor in the production of TTHMs.