Dichloroacetic acid is a byproduct formed when chlorine disinfectants react with organic matter in water. It's linked to liver issues and increased cancer risk.

Dichloroacetic acid (DCA) forms when chlorine-based disinfectants react with natural organic matter in water during treatment. It's one of several haloacetic acids monitored in drinking water. DCA levels are typically measured in parts per billion (ppb). While chlorination is crucial for eliminating harmful pathogens, it can create these unintended byproducts. Water utilities strive to balance effective disinfection with minimizing DCA formation through various treatment techniques and source water management practices.