“Any fool can make things bigger, more complex, and more violent. It takes a touch of genius-and a lot of courage-to move in the opposite direction.” - Albert Einstein

Aquinas College



San Francisco, California
Photo courtesy of Bigfoto

There is often confusion about the difference between graywater and blackwater. The EPA defines graywater as "domestic wastewater composed of wash water from kitchen, bathroom, and laundry sinks, tubs, and washers," and blackwater as "water that contains animal, human, or food waste."


Graywater Information Central

"All aspects of grey water systems. Why to use them, how to choose, build and use them, regulations, studies, and examples. Includes grey water irrigation, grey water treatment, grey water filters, and indoor grey water reuse."

Greywater Irrigation

This site offers information on a variety of greywater technologies, as well as other useful links.

Water Resources Research Center (WRRC)

The WRRC was established in 1957 with the mission to provide statewide outreach and education focused on critical water issues affecting Arizona and to provide expertise on state and regional water management and policy. The link outlines information on how residential consumers can reduce their potable water consumption by reusing greywater for landscaping and harvesting rainwater. In addition, the site contains information on more sophisticated commercial greywater reuse systems.

Funded by the Steelcase Foundation of Grand Rapids, Michigan
Header photo by Carol Y. Swinehart, courtesy of Michigan Sea Grant Extension
Site by CMC/GrandNet