Used water from inside discharges into covered troughs of sand, then seeps into the surrounding flower gardens of this Maryland home.
Graywater from this Pacific-coast house drains into a planter bed filled with tropical species. A clear overhang shelters the system from rain that might flood it.
A graywater system is disguised as a 19th-century garden that is toured by the public at The Old Manse in Concord, Massachusetts.
A Washwater Garden is a trench system that uses up graywater discharged by a washing machine alone.
A cutaway of a Washwater Garden shows how plant roots and substrate (layers of sized gravel) filter graywater.
At the EcoHouse in Berkeley, California, graywater from a washing machine and bathroom drains to a small wetland. Then it runs to gravel- and mulch-filled troughs, where it leaches to the roots of plants and trees for more filtration.
--ECOLOGICAL DESIGN COOPERATIVE