Use Graywater when Building a GREEN home, or "greening" an existing home
By using your graywater, you are contributing to Mother Earth's sustainability. Graywater is water that has been used in your shower, your sink, your dishwater, water you use to wash your fruits and vegtables and so on. Literally any water but your toilet water is considered to be "graywater".
Green homes usually reduce water usage in part because green homes typically install a gray water and/or rainwater capture system. According to http://www.graywater.net/ gray water is considered to be any water that has been used in the home, except water from your toilets. It has been estimated that Americans waste anywhere from 50% - 80% of their water that could be reused for landscape irrigation.
Grey water decreases the strain on your septic system, if you choose to build a rural home. If your new home is inside the city limits, grey water will decrease the waste water flow into your town or city municipal water treatment plant which means higher treatment effectiveness and lower costs for everyone in your community.
If your land is slow to percolate or has other soil related problems, a gray water system can be a partial or complete answer to a very costly "fix" to your problem.
Gray water allows plants to flourish because graywater contains bits of compost that is already partially biodegraded. Gray water encourages plants to grow by adding much needed lost macro and micro nutrients to the soil.
To learn more about graywater systems and how to install gray water systems in new construction or if you want to remodel your current to make it a "Green" home, visit http://oasisdesign.net/greywater/createanoasis/index.htm . You will want to also visit http://oasisdesign.net/greywater/misinfo/index.htm to learn how to avoid common mistakes and create a best practice system for maximizing the use of your graywater.