What is the primary health risk associated with exposure to trihalomethanes?

The primary health risk associated with exposure to trihalomethanes (THMs) is cancer. Trihalomethanes are chemical compounds that can form when disinfectants, such as chlorine, react with natural organic matter in water. Prolonged exposure to THMs has been linked to an increased risk of various types of cancer, including bladder and colorectal cancer.

The concern arises from epidemiological studies that have indicated a potential correlation between high levels of THMs in drinking water and certain carcinogenic outcomes. These findings have prompted regulatory agencies to set limits on THM concentrations in potable water to minimize public health risks. Overall, while other health concerns regarding trihalomethanes do exist, the association with cancer remains the most significant and widely recognized risk.