Chlorine dioxide typically is generated onsite and dosed into potable, process, reclaim, and wastewaters prior to distribution. Often these system use vacuum operated feeders offering maximum safety and potency, allowing flexible design for different control strategies. It is typically uses as a disinfectant, being effective even at low concentrations, because of its unique qualities. One of the qualities of chlorine dioxide is its water solubility, especially in cold water. Chlorine dioxide does not hydrolyze when it enters water, but remains a dissolved gas in solution, being approximately 10 times more soluble in water than chlorine. Chlorine dioxide is a highly effective oxidant with good germicidal properties that also provides excellent residual disinfection action and biofilm control.