Water Reuse

Direct Potable Reuse

Augmentation of Potable Water Supply

Augmentation of Potable Water Supply is the use of reclaimed water as a potable water supply. This can be accomplished in two main ways, directly and indirectly. Indirect potable reuse refers to the use of reclaimed water for potable purposes only after certain environmental barriers are put in place between the source of the reclaimed water and the intake for the potable water. In practice, this can refer to groundwater or surface water that has received treated water. In reality, indirect surface water use is quite common. Many municipalities use as sources of potable water a river or lake that has had treated wastewater discharged into it. This is less common, but still practiced in some areas with groundwater. Direct water reuse is reuse that does not make use of any environmental barrier. In other words, simply sending water from a wastewater treatment facility directly to a potable source treatment facility. While this practice is rarely used, it has gained some traction in recent years.

Guidelines for Water Reuse. US Environmental Protection Agency. EPA/625/R-04/108. September 2004.