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The Great Greywater Challenge


1 Year. 365 systems. 5 million gallons saved!

Inspiring San Diegans to install over 365 greywater systems in 2013.  When you wash your clothes, do you know where that water goes?   Rather than letting this abundant resource go “down the drain” you can tap into it to sustainably irrigate your fruit trees and other landscape plants, getting your clothes (and your conscience) clean at the same time!  A family of 4 people can save over 16,000 gallons of water a year by using laundry water to irrigate their landscape. If 365 households set up a simple, cheap, permit free, and legal greywater system we can save the region over 5 million gallons of water a year!  Come join the challenge, together we can create a water abundant San Diego.

How to participate

You can participate in the Great Greywater Challenge too!  Read our tutorials, watch a video, attend a workshop, install and register your system, it’s that easy.  We have all the tools you need to get started.  We are here to help, guide and support you.