Toxics Cleanup Program
EAA = Early Action Area
RM = River Mile
About the Project
The Lower Duwamish Waterway site is an approximately 5 mile portion of the Lower Duwamish River which flows into Elliott Bay. The Lower Duwamish Waterway contains contaminants due to decades of industrial activity and run off from residential areas. In 2001, the U.S. Environmental Protection Agency (EPA) added the Lower Duwamish Waterway site to the Superfund National Priorities List. The Washington State Department of Ecology (Ecology) added the site to the Washington Hazardous Sites List in 2002.
Ecology and the EPA are working to clean up contaminated sediments and control sources of pollution in the Lower Duwamish Waterway. Ecology leads efforts to control sources of sediment pollution in the Lower Duwamish Waterway in cooperation with the City of Seattle, King County and EPA. EPA is the lead for the sediment cleanup.
Lower Duwamish Waterway sediments contain a wide range of contaminants due to decades of industrial activity and run off from residential areas. These contaminants include PCBs (polychlorinated biphenyls), PAHs (polycyclic aromatic hydrocarbons), chlorinated dioxins & furans, arsenic and other metals, pesticides and phthalates.
Ecology and EPA are working to control sources of pollution in the Lower Duwamish Waterway and clean up contaminated sediments in the Lower Duwamish Waterway under an Administrative Order on Consent with the City of Seattle, King County, the Port of Seattle, and The Boeing Company.
EPA leads the sediment contamination investigation for the
Lower Duwamish Waterway site with support from Ecology. In 2001,
EPA added the Lower Duwamish Waterway site to the Superfund
National Priorities List; Ecology added the site to the
Washington Hazardous Sites List in 2002. More information on
the Lower Duwamish Waterway Superfund site can be found on EPA’s
Lower Duwamish Waterway site. More information on the
sediment contamination clean up can be found on the following
sites: Duwamish River Cleanup Coalition (http://www.duwamishcleanup.org)
and the Lower Duwamish Work Group (http://www.ldwg.org).
The EPA and Ecology held a public comment period on plans for the cleanup of Lower Duwamish Waterway sediments from February 28 – June 13, 2013. Ecology’s public comment period presentation is available in English and Spanish. The documents presented for public review include:
Ecology’s responses to source control related comments will be included in EPA's Record of Decision.
Ecology leads the interagency Source Control Work Group
(SCWG). The SCWG shares information, discusses strategy,
develops action plans, implements source control measures, and
tracks progress. The SCWG includes Ecology, the City of Seattle,
King County, Port of Seattle, and EPA. The table below shows
each agency’s role in SCWG.
This page last updated June 13, 2016
Amelia (Amy) White,
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