Rainwater Harvesting for Drylands and Beyond by Brad Lancaster

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Greywater-Harvesting Research

• “Residential Graywater Reuse: The Good, The Bad, The Healthy,” June 2000, Water Conservation Alliance of Southern Arizona.
This study found that 20,000 to 30,000 households (40,000 to 80,000 people) in Pima County alone were likely harvesting greywater illegally without permitted systems. The state of Arizona’s permit process at the time was very onerous and expensive, contributing to people ignoring it entirely.

Thus this study led to the creation of simple greywater-harvesting guidelines that apply throughout the state of Arizona. As long as those guidelines are followed no permit, inspection, or fee is required.
As a result, people now utilize and practice the state’s guidelines as opposed to ignore them.

The study also does an analysis of greywater quality and quality of soil irrigated with greywater, and helped inform the state’s greywater-harvesting guidelines.

Research to debunk exaggerated “assumed health risks” of greywater

Do you have an addition to this list? Let me know.

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Upcoming Events

  1. Online Rainwater Harvesting Course

    October 21 - December 5
  2. Water Harvesting Presentation & Book Signing with Brad Lancaster in Silver City, NM

    November 19 @ 6:00 pm - 7:30 pm
  3. ARCSA Conference in Las Vegas, Nevada

    December 2 - December 5
  4. Water Harvesting Presentation & Book Signing with Brad Lancaster in Las Vegas, NV

    December 2 @ 6:00 pm - 8:00 pm
  5. Spring 2020 – Permaculture Design Course, Tucson, AZ

    February 8, 2020


Umbrella Newsletter

The Umbrella: Summer 2019

THE UMBRELLA: A catch-all of resources, events, media, and more from Brad Lancaster   New, full color, revised editions of the award-winning books Rainwater Harvesting for Drylands and Beyond, Volumes 1 and 2 are now available for order and pre-order!   Buy direct from Brad for big discounts, and to help him fund the creation […]

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