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Wastewater Treatment

King County, Washington

For questions about the Wastewater Treatment Division website, please send an e-mail message or contact us at:

King Street Center
201 S. Jackson St., Suite 500
Seattle, WA 98104-3855
Phone: 206-477-5371
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Get Directions to our office location in Seattle, Washington.

Staff Contacts

Green Grants

Duwamish River Basin Grant Area
Duwamish River Basin Grant Area

Grant funding is available for air or water quality improvement projects, environmental education and community outreach efforts within the Duwamish River Valley. King County Wastewater Treatment Division is eager to assist cities, neighborhood groups, schools, businesses, community groups and non-governmental organizations fund projects and activities that help improve air and water quality in the Green/Duwamish and Central Puget Sound watershed.

Lower Duwamish air and water quality improvement grants

These grants are to help improve air and water quality in the Duwamish watershed to support the successful implementation of future combined sewer overflow prevention projects in this area and meet regulatory obligations for clean air. They are also offered to promote partnerships in the Duwamish area with the goals of advancing source control for the Superfund Cleanup, developing local expertise in water and air quality protection and enhancing small scale environmental and economic opportunities in the community. Projects can be both structural and non-structural stormwater best management practices.

Examples of projects within this category include:

  • Air quality improvements to sources of air pollution or projects that help solve air pollution
  • Identify sources of air pollution in the Duwamish area
  • Educate citizens and/or businesses about air pollution and ways to reduce exposure to air pollution
  • Outreach to local businesses and community to promote air or water quality goals
  • Stormwater bioretention/biofiltration projects (e.g. rain gardens, bioswales and filter strips)
  • Stormwater controls and practices that prevent contaminated stormwater from entering the river

Learn more about grant criteria, policies and applicants requirements (Green/Duwamish and Central Puget Sound Watershed Web site).

News releases

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Related topic

Our Duwamish
The Lower Duwamish Waterway is an economic engine, cultural icon, and vital regional transportation corridor. No matter where we live in King County, no matter how we use the river, we all have a stake in protecting it -- it’s Our Duwamish. Learn more.