graywater

Wholly H2O, In the Know: Graywater

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

Water used in the kitchen sink is considered graywater in some states, blackwater in others, and dark grey in yet others due to the higher levels of grease, fat, and bacteria found in the water. In California, kitchen sink water is considered blackwater. As such, it’s not an allowable source for graywater harvesting.

Graywater is sometimes confused with rainwater (water collected from roofs and other surfaces) which is often stored for later use… Continue Reading


Wholly H2O, In the Know, Graywater: Facts and Figures

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… More

Wholly H2O, In the Know, Graywater: Uses and Benefits of Graywater

USES AND BENEFITS
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… More

WhollyH2O, In the Know, Graywater: Graywater and the Hydrology Cycle

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… More



Wholly H2O, In the Know, Graywater: Designs and Considerations

DESIGNS AND CONSIDERATIONS
Graywater systems vary greatly depending on the context. A retrofitted system… More

Wholly H2O, In the Know, Graywater: Typical Components of a Graywater System

TYPICAL COMPONENTS
Need placeholder text here about how a typical graywater system is set up in terms of parts and design, where it flows out… More

Wholly H2O, In the Know, Graywater: Graywater Codes and Regulations

CODES AND REGULATIONS
Graywater laws in the US vary greatly from state to state. According to the new State Plumbing Code, Cal… More