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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Umbrella Newsletter

The Umbrella: Summer 2020

THE UMBRELLA: A catch-all of resources, events, media, and more from Brad Lancaster In this time of Covid-19 and spending more time at home to be safe, I’ve been grateful for the solace, inspiration, and bountiful sustenance my water-harvesting gardens, landscape, and neighborhood forest has provided me, my family, friends, and neighbors. Record summer heat […]

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