Abstract: A sanitizing system for water treatment in appliances that use or that have an associated water cycle where sanitization of the water in the water cycle is beneficial. The system comprises a controller, a biocide, and a biocide injection subsystem, wherein the controller provides a signal to the injection subsystem to release a biocide into a water reservoir contained within the appliance, and further wherein the signal provided by the controller is in response to a signal received by the controller from the appliance.