Trihalomethanes (THMs)

Trihalomethanes (THMs) are chemical compounds formed when chlorine used in water treatment reacts with natural organic matter in the water, like decayed leaves or algae. Common THMs include chloroform and bromodichloromethane. While chlorination effectively kills harmful bacteria, it can produce THMs as byproducts, which may pose health risks if present in drinking water at high levels over time. Water treatment facilities monitor and control THM levels to ensure safety. Generally, drinking water with low to moderate THM levels is considered safe, but reducing exposure is beneficial for long-term health.