What is the primary concern with excessive chlorination in water treatment?

The primary concern with excessive chlorination in water treatment is the formation of chlorinated byproducts. When chlorine is added to water, it reacts with organic matter present in the water to produce a variety of byproducts, some of which can be harmful to human health. These byproducts, such as trihalomethanes (THMs) and haloacetic acids (HAAs), are regulated due to their potential carcinogenic effects, and their presence in drinking water can pose significant health risks.

Additionally, monitoring and managing the levels of these byproducts is crucial for ensuring safe drinking water and maintaining regulatory compliance. While issues such as chlorine odor, increased water temperature, and reduced disinfection efficiency can occur as a result of chlorine use, the most pressing concern remains the health impacts associated with chlorinated byproducts formed through excessive chlorination.