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The King County Wastewater Treatment Division is currently operating as normal, 24/7. Following the guidance of Seattle-King County Public Health, all facility tours and in-person education events have been suspended and the Brightwater Center is closed until further notice. Please check back periodically for updates.

For questions about COVID-19, we encourage people to visit the Public Health – Seattle & King County website: and subscribe to the Public Health Insider blog:

Learn how wastewater can be recycled into reusable water, energy, and nutrients for plants and soil. Tours encourage visitors to think about responsible water use, the products they use and how everyday choices can help protect Puget Sound.

Wastewater tours focus on the following topics:

  • Water cycle and nutrient cycle
  • Wastewater treatment and human health
  • Human impacts to water systems
  • Pollution prevention and water conservation

Tours for:

Individuals, families, and community groups of fewer than 10 people should register for an upcoming Saturday community treatment plant tour. This is also the best option for home school groups, Scout troops, and other non-school-affiliated groups of children ages 9 and over.

Visit the Brightwater Center events page for a list of upcoming tour opportunities.

Pre-registration is required via the King County Wastewater Education website. Note: The registration page is used for a variety of groups and events. In the "appointment details" section, indicate that you are registering for a Saturday community tour.

Tours are available for groups of 10-20 people. Dates and times vary based on staff availability.

Pre-registration is required via the King County Wastewater Education website.

Tours are available for groups visiting from other countries. Please contact Susan Tallarico at or 206-263-8930 for more information.

General information

Cost Free
Tour length 2 hours
Age minimum 9 years old
Pre-registration Required for all groups and individuals. Register online via the King County Wastewater Education website
Dress code Tours take place outside and in an industrial setting; all visitors must dress appropriately and wear long pants and closed-toed shoes.
Accessibility All participants must be able to walk approximately 1 mile and travel up and down multiple levels of stairs. Advance notice is required for accessible tours and accommodations.
Other Tour groups must start and end the tour together. It is not possible to leave early.

Influent screening area
Plant tour (pump gallery)
Digester tanks

Brightwater Center
22505 State Route 9 SE Woodinville, WA 98072-6010
206-263-9412 or 206-263-8930
Directions to Brightwater Center