Gray water’s untapped potential is clouded by complexity
Every day, Arizonans dump a small flood of drinking water down the drain, whether by running the shower or washing their clothes. It seems like an untapped reservoir for water conservation: Unlike “black water” — from sewage, kitchen sinks and dishwashers — much of the “gray water” from clothes washers, bathtubs, showers or sinks remains clean enough for other household uses. … Although the state has some loose guidelines for gray water systems, homeowners can install them with little or no oversight …