EPA Superfund site
DEWEY LOEFFEL LANDFILL
Human exposure is NOT currently under control
Data limitations: Proximity to a Superfund site boundary does not mean your property is contaminated. EPA site boundaries show the area designated for cleanup, not the full extent of contamination. Groundwater plumes can extend beyond site boundaries. This tool shows publicly available EPA federal data. It is not affiliated with or endorsed by EPA, and is not a substitute for a professional environmental assessment.
About this site's exposure pathways
As of June 2026, the Dewey Loeffel Landfill Superfund site is classified as Current Human Exposure Not Under Control (HENC), meaning some exposure routes remain today that could pose unacceptable risk. The New York State Department of Health (NYSDOH) has issued fish consumption advisories for the Valatie Kill, Nassau Lake, and Kinderhook Lake due to PCBs in fish tissue. Before listing on the National Priorities List (NPL), the New York State Department of Environmental Conservation (NYSDEC) implemented interim actions, including landfill containment, seasonal groundwater pumping and trucking, and targeted PCB removals from soils and sediments in tributaries to Nassau Lake. EPA constructed an on-site treatment plant in 2013 to enable year-round collection and treatment of groundwater and leachate. A second removal action begun in 2018 to address contaminated sediments in a drainageway to Nassau Lake was paused after extensive lateral contamination was found along the steep banks; remaining contamination will be addressed under the remedial program.
Planned activities include continuing PRP removal actions and phased remedial work; completing RI/FS for remaining areas; delineating sediment and bank contamination along drainageways; and additional sampling of fish tissue, sediments, surface water, groundwater, and leachate to define the nature and extent of contamination and trends, followed by determination of further actions.
To reduce exposure if you live or recreate near the site, follow NYSDOH fish advisories for the Valatie Kill, Nassau Lake, and Kinderhook Lake and participate in the residential well monitoring program. For more information, contact EPA Community Involvement Coordinator Larisa Romanowski via the site webpage, at (518) 407-0400, or [email protected]. EPA will continue engagement with residents and stakeholders, issue public notices and fact sheets, maintain the site profile on EPA’s website, and support the Community Advisory Group (CAG).
EPA currently anticipates achieving Human Exposure Under Control by December 2049, contingent upon completion of remedial actions, full implementation and maintenance of institutional controls and advisories, and long-term monitoring demonstrating that fish tissue concentrations meet risk-based cleanup goals. This milestone would culminate in the Final Closeout Report (FCOR), as reflected in the Superfund Enterprise Management System (SEMS).