It refers to a group of four organic compounds that are commonly found in drinking water:
* Chloroform (CHCl3)
* Bromodichloromethane (CHBrCl2)
* Dibromochloromethane (CHBr2Cl)
* Bromoform (CHBr3)
Definition:
Total Trihalomethanes (THM) are a group of chlorine-containing disinfection byproducts that form when chlorine (used to disinfect drinking water) reacts with naturally occurring organic matter in the water.
Importance:
THMs are considered potential human carcinogens and are linked to various health problems like liver, bladder, and rectal cancers. The presence of THMs in drinking water is a significant concern for public health.
Regulations:
Many countries and regions have set maximum contaminant levels (MCLs) for THMs in drinking water to protect public health.
Monitoring:
Water utilities regularly monitor THM levels in their drinking water systems to ensure they comply with regulatory standards.