When organics in surface water combine with halogen, what compound is formed?

When organics in surface water combine with halogens, the resulting compounds are known as trihalomethanes. This reaction typically occurs during the disinfection process of drinking water when chlorine or other halogens are used. The presence of organic matter, such as natural organic compounds, when chlorinated, can lead to the formation of these undesirable byproducts.

Trihalomethanes are a group of chemicals that include chloroform, bromoform, dibromochloromethane, and bromodichloromethane. These compounds are significant because they are not only byproducts of the disinfection process but they also have potential health implications if present in high concentrations in drinking water.

The formation of trihalomethanes is a critical concern for water treatment facilities, as regulations often dictate the maximum allowable levels to minimize health risks associated with long-term exposure. Thus, understanding this reaction is essential for maintaining water quality and ensuring public health safety.