Here in California, fruit hangs heavy on the vines
And there's no gold, I thought I'd warn you
And the hills turn brown in the summertime…
Kate Wolf Tweet
Drought has become the “new normal” in California. Currently, the National Integrated Drought Information System categorizes 97.5% of state land as being in “severe drought” (D2) or worse. Further, global climate change is causing dry periods (and other extreme weather) to become more frequent at an astonishing pace.
A simple way we can save water for ourselves and our community in California’s new reality is to consider recycling greywater (also spelled grey water, graywater, gray water). Greywater is any used household water that is non-potable (unsafe for drinking by humans) but hasn’t contacted toilet waste. Greywater can irrigate landscapes without undergoing any treatment.
It’s possible to start a home greywater system, specifically a Laundry to Landscape (L2L) system, quite cheaply (e.g. bring an empty bucket with you when you take a shower, let it fill, and use it to water your home landscape); later you may see opportunities to expand your home L2L scheme and expand your general greywater knowledge. (Used water that can possibly have contacted toilet waste is considered blackwater; it’s unsafe for recycling for any purpose without treatment.)
History
In the first decade of this century, Bay Area residents who wanted to recycle greywater, like the founders of Greywater Action (formerly Greywater Guerillas), faced an onerous plumbing code that discouraged construction of greywater systems, even though they were legal under a 1997 California law. Many worked around expensive and prohibitive code guidelines by simply designing systems that violated code and daring law enforcement to charge them. Today, a large proportion of California greywater systems still violate rules.
In 2009, California finally amended its plumbing code (California Plumbing Code, Chapter 16A: Non-potable Water Reuse Systems) in order to simplify it, making it much simpler to implement basic greywater systems.
Read here about the legal history of greywater in California.
Basic System Overview
Art Ludwig of Oasis Design pioneered the fundamental Laundry To Landscape (L2L) system (diagram). Here are excerpts from an instructional video by Oasis Design on the subject.
Some essential L2L components:
You can watch a video excerpt about maintaining your greywater system by Greywater Action.
Useful Tips
Green Shoots
Most of the major water providers in the Bay Area have rebates for both home and commercial greywater systems or their components or are strongly considering coming out with programs. Some home programs:
Bay Area Greywater Contractors
Keep in mind that plumbers who do not work with greywater system contractors may or may not be able to provide effective quality assurance for your system design and the work you’ve done on it.
Links
Greywater Action: Maintaining your greywater system