organic chemicals such as chloroform that can form during water disinfection using chlorine-based chemicals. Their concentrations are regulated under the NPDWS.
Organic and inorganic compounds that often result from the reaction between a disinfectant and naturally occurring materials in water; chloroform is a commonly found example.
Pollutants formed when organic materials in a drinking water source react with the disinfectant, such as chlorine or ozone. Trihalomethanes (THMs) are a major group of disinfection byproducts.