Why Use Non-Potable Water
Non-potable water can be used to meet demands like lawn irrigation or industrial applications that do not require drinking-water quality. Non-potable water can come from a variety of sources, including recycled treated wastewater, stormwater, or groundwater wells. Using non-potable water can add reliability and resiliency to the system and reduce the need for new or expanded sources of raw water.
Non-Potable Water Uses
Rain Barrels have been used for centuries to conserve water. Downspouts direct rainwater from roofs into barrels so water can be used later to water lawns or gardens.
Groundwater from existing wells may be used to meet irrigation demands or a combination of industrial and irrigation demands. A combination of using retired wells and some new wells could be a reliable source for meeting non-potable demands, even in times of drought.
Recycled water from the City's treated wastewater tends to be relatively expensive (due to much higher degree of treatment and a separate delivery system) compared to drinking water and to other sources of non-potable water, but can be a reliable option for an industrial user.
Recycled wastewater is currently used to support wildlife habitat at the Missouri Department of Conservation's Eagle Bluff Conservation Area. As the city grows and more wastewater is generated, additional treated flows could be recycled to meet non-potable demands. However, recycled water could cost relatively more than other non-potable options described here, and even more than treated drinking water.
Stormwater capture in detention ponds could be a way to store runoff that could be pumped out and used as a non-potable supply. Because this option relies on rain, it is not drought resistant. These detention ponds can serve as a dual purpose as a supply for irrigation and a stormwater control mechanism.