Septic Dye Testing is a non-invasive procedure that is sometimes used to determine the condition of the components of a home's waste system. A septic dye test can expose obvious leaks and inadequacies in the system and indicate the need for repairs or alterations. It involves the introduction of a fluorescent dye into the septic system, which is "traced" to ascertain that the septic system can handle the volume of waste that is currently being put through it.
Since this type of septic inspection is a VISUAL inspection, it has many limitations. A home inspector can only report upon what is observed above-ground, which does not always give an accurate evaluation of the health of a septic system