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Wastewater Treatment Division (WTD) and Novel Coronavirus (COVID-19)

WTD operations staff remain on the job 24/7 to ensure the region’s wastewater treatment service continues. Following the guidance of Seattle-King County Public Health, our offices are closed to the public and all facility tours are suspended 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:

Wet weather resiliency

We are continually working to make our operations more resilient during winter storms in wet weather season, and making improvements at our West Point Treatment Plant.

We currently have major projects underway to improve our wastewater treatment system, including:

See how our system works:

King County Wastewater Treatment Division stands in solidarity with our staff, partners and the people of our community seeking to end racism and all its forms of injustice in King County and the country.

The tragic loss of George Floyd, Breonna Taylor, Ahmaud Arbery and the grieving turmoil of their deaths has caused us great sadness and has strengthened our resolve to condemn violence against Black Americans.

King County Wastewater Treatment Division believes that the right to clean water and sanitation is a basic human right, as is life itself. We will keep working to end institutional racism in our organization and discrimination and bias in the communities we serve.

To learn more about King County’s equity and social justice initiatives, visit:

Only toilet paper belongs in the toilet. Do not flush anything else (even if it is labeled flushable). Flushable: wipes are not really flushable – they don’t break down and can cause expensive plumbing problems in your home and damage the sewer system. Put wipes in the trash. Learn more.

Here are some quick navigation links:

Clean Water Plan Regional Engagement: A Year in Review (2020)
Regional wastewater treatment plants

Brightwater, near Woodinville
South Plant, Renton
West Point, Seattle

Regional committees

MWPAAC - Metropolitan Water Pollution Abatement Advisory Committee

RWQC - Regional Water Quality Committee


WTD career opportunities and internships

Local sewer agencies

King County online directory

Public Records Officers

Department of Natural Resources

Public Health - Seattle and King County

Clean Water Healthy Habitat: Based on science, focused on outcomes from King County Executive on Vimeo.

View current King County WTD incident responses.

Read all blog posts

Follow WTD via social media

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Get information, news, and alerts via email or text message from King County Wastewater Treatment Division.