Graywater Overview

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Graywater Overview

Graywater Defined

In California, “graywater” (also spelled greywater) is water that comes from: bathroom sinks, showers, tubs and clothes washing machines.

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Graywater Facts and Figures

In the United States, the rough estimate of per capita graywater production is 28 gallons per person per day (AWWA 1999), or about 10,000 gallons per person per year. For…

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Uses and Benefits of Graywater

Graywater can replace tap water for non-potable water needs, such as irrigation, toilet flushing, clothes washing and numerous industrial processes. Matching water end use with the best water source is…

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Graywater and the Hydrology Cycle

For most people living in urban areas of California, water is supplied through large-scale intervention in the natural water cycle, in the forms of dams, river flow diversions, or pumping…

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Graywater Design Considerations

Graywater systems vary greatly depending on the context. A retrofitted system reusing water from the washing machine in an existing house will look completely different from a system designed during…

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Typical Components

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Graywater Codes and Regulations

Graywater laws in the US vary greatly from state to state. According to the new State Plumbing Code, California doesn’t require permits for laundry systems that don’t alter household plumbing…

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