A system and method for conditioning water is provided. A fluid flow sensor senses a flow of untreated discharge water passing through a water discharge drain line. The sensor generates one of a first sensor signal indicating a flow of the untreated discharge water and a second sensor signal indicating an absence of the flow of the untreated discharge water. A water conditioning controller transmits a first actuation signal to a conditioning agent pump when the first sensor signal is received, wherein a portion of a conditioning agent residing in a conditioning agent reservoir is pumped into the water discharge drain line to mix with the flow of untreated discharge water, and transmits a second actuation signal to the conditioning agent pump when the second sensor signal is received so that the portion of the conditioning agent is not pumped from the conditioning agent reservoir.