Dear EarthTalk: I know that some large buildings filter some of their wastewater to irrigate exterior landscaping. Is there an affordable way to do this at home? -- Bill P., Salem, OR
Now that solar panels are so commonplace on rooftops across the country, reusing so-called greywater—that is, the waste water from sinks, showers, tubs and washing machines—for landscape irrigation may be the next frontier in the greening of the American home, especially if you live in an arid region where water use is restricted. In fact, reusing your graywater may be the only way to keep your lawn and garden healthy without taking more than your fair share of the community's precious freshwater reserves.