Why Use Greywater?

Are you tired of watching your bathing and laundry water go down the drain when it could be put to good use on your landscape? you paid for it already and it is safe and legal to reuse that "greywater" In some cases as much as 200 gallons a day or more, may be available to water your yard.

In addition to conserving water and probably reducing your water and sewer bills, you will also be "drought-proofing" your landscape by using greywater. In most homes, more than half of your indoor water can be reused as greywater. During shortages when outdoor watering may be restricted, you will have a constant source of water. With landscapes valued at between 5 percent and 10 percent of the value of a home, this back-up supply of water may be an important economic insurance policy for you. Furthermore, the nutrients in greywater may be beneficial to your plants.

The California Building Standards Commission has recently adopted emergency Greywater Standards as part of the State Plumbing Code. These standards were developed and adopted in response to Senate Bill 1258, Greywater Standards, with the purpose to conserve water by facilitating greater reuse of greywater in California.

Existing law: defines “greywater” as “untreated wastewater which has not been contaminated … and does not present a threat from contamination by unhealthful processing, manufacturing, or operating wastes. Greywater includes wastewater from bathtub, showers, bathroom washbasins, clothes washing machines, and laundry tubs but does not include wastewater from kitchen sinks or dishwashers.” (Water Code Section 14876)

Some steps to follow to put greywater to use in your landscape are:

  • Getting Informed
  • Brainstorming
  • Design the system
  • Installation of the system
  • Using and maintaining the system

If you decide not to do some of the steps yourself, you can hire a landscape contractor to install the irrigation system or a plumbing contractor to install the plumbing. They will follow this same process.

What you can do to help Save the Planet


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