Rainwater Harvesting for Drylands and Beyond by Brad Lancaster

Greywater Harvesting

Rain- and greywater-harvesting garden on periphery of small yard in Tucson, AZ. Roof runoff is directed to basins via a downspout, then pipe (beneath the path—see dotted blue flow arrow). Kitchen-sink dark greywater is directed to basins via a branched-drain pipe system (purple dotted pipe). Washing-machine greywater is directed to basins via a multi-drain system (purple dotted pipe). With each load of laundry the washing machine’s drain hose is rotated from one greywater drain to the other (each discharging greywater to a different section of a mulched basin and its plantings). Greywater is discharged to multiple points, rather than one, to ensure soil stays aerobic and odor-free. All systems use gravity to distribute the water for free. Thus all pipes maintain a minimum 2% slope (1/4-inch drop per horizontal foot, or 2-cm drop per horizontal meter).

HarvestingRainwater.com Greywater Image Gallery

HarvestingRainwater.com Greywater Videos

In addition to the links below, we also have a list of Greywater Resources such as publications, online resources, compatible soaps, and system components.

Drops in a Bucket Blog

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Upcoming Events

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Umbrella Newsletter

The Umbrella: Winter 2015–16

A catch-all of resources,
events, media, and more
from Brad Lancaster
Winter 2015–16
What more meaningful way to celebrate the approaching SOLSTICE (Winter Solstice is December 21 this year in Tucson) than by engaging with, noticing, and highlighting the 23.44º tilt of the Earth? After all, this tilt is what gives us our seasonally changing sun […]

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