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Seattle Education Meeting

New Greywater Reuse Laws in Washington State
When Jun 22, 2011
from 07:00 PM to 09:00 PM
Where Phinney Neighborhood Center
Contact Name Wayne Apostolik
Contact Phone 206-601-9725
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New Greywater Reuse Laws in Washington State
For Residential and Commercial Irrigation Applications

The increasing demand on existing water supplies has generated a keen interest for affordable, safe, and easy methods to reuse water. In 2006 the Legislature directed the Washington State Department of Health (WSDOH) to develop and adopt rules for greywater reuse. The WSDOH completed the process of writing new rules that will allow greywater to be used for residential and commercial applications for outdoor subsurface irrigation.

Greywater reuse for seasonal subsurface irrigation was adopted into rule in early 2011 and will become an effective on July 31, 2011. The Washington State Department of Health has jurisdiction over greywater reuse for outside subsurface irrigation. After adoption, the local county health jurisdictions will need to incorporate the new rules into their programs. Reuse of greywater inside of a building is covered under the new addendum of the Washington State Plumbing Code.

Our speaker, Mark Buehrer, PE, Founder and Director of 2020 ENGINEERING, has served on the WSDOH greywater committee for the last two years.  He will discuss the new greywater reuse rules and provide some project examples of how greywater from water fixtures within residential or commercial buildings can be used to irrigate landscapes and gardens.  Mark’s presentation will also include some local examples of Living Building Challenge projects that include greywater reuses, such as the Bullitt Foundations proposed Cascadia Center for Sustainable Design and Construction and the recently completed new Bertschi School Science Classroom which features a living wall that is irrigated with all of the building’s greywater.

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