Greywater Recycling

Did You Know?

Basin, shower, sink, and laundry water comprise 50-80% of residential “waste” water. This may be reused for other purposes, especially landscape irrigation.

Is greywater re-use safe?

Yes. There are eight million greywater systems in the US with 22 million users. In 60 years, there has been one billion system user-years of exposure, yet there has not been one documented case of greywater transmitted illness.

What is greywater?
Grey water is defined as water from baths, showers, hand basins and clothes washing machines or the laundry. Any water from any other source ( toilet water, and from kitchen and bidet’s) is considered black water, and must be allowed to proceed to the sewer, and be treated by some sort of sewerage treatment works.

Greywater systems combined with rainwater systems allow you to get double use of your rainwater harvesting system.

Why use greywater?
It’s a waste to irrigate with great quantities of drinking water when plants thrive on used water containing small bits of compost. Unlike a lot of ecological stopgap measures, greywater reuse is a part of the fundamental solution to many ecological problems and will probably remain essentially unchanged in the distant future. The benefits of greywater recycling include:

Lower fresh water use
Less strain on failing septic tanks or treatment plants
Better treatment (topsoil is many times more effective than subsoil or treatment plants)
Less energy and chemical use
Groundwater recharge
Plant growth
Reclamation of otherwise wasted nutrients
Increased awareness of and sensitivity to natural cycles