Figure illustrating all three scenarios (click for full size; click full-sized figure again to magnify):

Summary of scenarios examined in the risk examplar. Scenario 1: a conventional water plant drawing from a source that is 5 percent treated wastewater in origin. Scenario 2: a deep well in an aquifer fed by reclaimed water via a soil aquifer treatment system. Scenario 3: a deep well drawing from an aquifer fed by injection of reclaimed water from an advanced water treatment plant.