Shades of Gray

The mixed-use development at Barrett, the Honors College at Arizona State University, uses treated graywater from the showers and sinks of a 1,700-bed residence to irrigate the landscaping.

Designed by KMD Architects, the 1,425-square-foot Bertschi School Living Science Building in Seattle features a wastewater-treatment system that reclaims graywater from classroom sinks to irrigate an indoor living wall of tropical plants.

Designed by KMD Architects, the Bertschi School Living Science Building in Seattle reuses rainwater and graywater to irrigate its outdoor and indoor gardens, respectively. Inside the school, a runnel that carries rainwater collected from the roof to a cistern doubles as a lesson in water conservation for students.

The rain garden at the Bertschi School is irrigated with filtered graywater.

An exterior classroom at the Bertschi School.

Process diagram for Living Machine Systems's graywater and blackwater treatment system at San Francisco Public Utilities Commission.

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