Holiday closure Monday May 28: Most county offices will be closed in observance of Memorial Day.

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Brightwater Center: the Education & Community Center and Park at the Brightwater Clean-water Treatment Facility

Tour the Treatment Plant

Influent screening area

Pump gallery

Digester tanks
Tours can accommodate 20 visitors per available King County tour guide

Learn how wastewater and human waste can be recycled into reusable water, energy and electricity, 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.

General information

Tours can accommodate 20 visitors per available King County tour guide - minimum of 10 visitors required for a private community or resident tour. Tours are available for school groups, community groups, professional groups, and international visitors.

Brightwater Tours

  1. School group tours are available Tuesdays-Thursdays, 9a.m.-4p.m.; school groups can combine a treatment plant tour with additional education programs. See School Day Programs (PDF) for more information.
    Please note: all Brightwater tours and programs for 3-8 grade are full for the current school year.
  2. Community group tours are available during monthly Open Houses, held on Saturdays.
  3. Professional groups and international visitor tours are scheduled based on the availability of staff.

Community groups and professional groups should use our online system to make a reservation request.

General Wastewater tours focus on the following topics:

  • Water cycle and nutrient cycle
  • Human impacts to water quality
  • Pollution prevention and water conservation
  • How wastewater treatment protects human health
  • How wastewater treatment protects ecosystems
  • How physical science, biology and chemistry are used to clean water and recycle water and nutrient resources
  • Stormwater and groundwater impacts on water management
  • Understanding of infrastructure - aging water systems, related jobs, impacts of population growth

Learn more about the tour program and how to schedule a tour at Brightwater.