Bromodichloroacetonitrile is primarily used as a disinfectant byproduct in water treatment processes. It is formed when chlorine-based disinfectants react with organic matter in water. Its application is significant in monitoring and controlling water quality to ensure safety for human consumption. Additionally, it is studied in environmental research to understand its formation, behavior, and potential health impacts, particularly in drinking water systems. Regulatory bodies often set limits for its presence to minimize risks associated with long-term exposure.