Net Zero Water Homes
Along with Net ZERO energy houses folks are now talking about Net ZERO Water homes. The idea is to be self sufficient - self sustaining and off the "water grid".
" ... Water ... requires energy to deliver, so excess use compounds our energy problems ... many renewable sources of power, such as solar, require massive amounts of water as an input, creating further pressure on limited resources."
"Net Zero water is an analogous concept to net zero energy. Through ... rainfall harvesting, aggressive conservation, and water recycling, buildings can achieve self-sufficiency from the water “grid.”"
" ... divide available sources of water into categories and treat them accordingly. Rainwater is relatively clean, and can be converted into drinking water with a minimum of processing.... grey water can be cleaned by filtering it through a biological wastewater treatment system ... "
While not yet achievavle for more that a few select instances ... Net ZERO water ..."makes as much sense as energy efficiency, and net zero water provides an admirably ambitious goal."
Via: TerraPAss LINK