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Wider use of waste water--from sinks, showers and laundry-- for landscape irrigation can preserve diminished freshwater supplies. A pilot program in Marin is out to make that both easier and more common.
As this chart indicates, more than half of a typical home's water use could be recycled through a graywater system.
Read more http://radio.krcb.org/post/expanding-graywater-use-marin
