Why is the river polluted?

The Lower Duwamish River is one of the most industrialized waterways in Washington State. EPA required extensive studies of the risks to people, fish, and wildlife, and will require the potentially responsible parties (PRPs) to pay for the river cleanup.

The Boeing Company and the public agencies – the Port of Seattle, King County, and the City of Seattle – have already been identified as polluters, or PRPs, who will bear the costs of cleaning up the River. Other industries on the river will also be identified as PRPs.

All of us contribute to ongoing pollution in the river through stormwater runoff from city streets carrying oil and grease, fertilizer, and other toxic chemicals. Wastewater from our homes and businesses also flow into the river through storm drains and overburdened Combined Sewer Overflows (CSOs).