Washington Greywater Regulations
Washington Administrative Code Title 246, Chapter 246-274, Updated March 2022
http://app.leg.wa.gov/wac/default.aspx?cite=246-274Report a broken link
Integrated Water Resource Managment
Washington’s greywater regulations establish requirements that provide building owners with simple, cost-effective options for reusing greywater for subsurface irrigation. The regulations encourage water conservation to protect public health and water quality.