Abstract: A system for determining a flushing frequency of a dead end main includes a user terminal in communication with a server. The server further includes memory and a processor in communication with the memory. A dead end main id, at least one disinfectant reading and at least one disinfectant reading of the dead end main are received from the user at the user terminal. The processor determines at least one flushing score of the dead end main based on the at least one disinfectant reading and a predetermined flushing score condition. The processor determines the flushing frequency of the dead end main based on the at least one flushing score and a predetermined flushing frequency condition.