EPA Superfund site
MATTHIESSEN AND HEGELER ZINC COMPANY
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 September 2026, the Matthiessen and Hegeler Zinc Co. Site is considered “Current Human Exposure Not Under Control” (HENC) because soil at many residential properties contains lead and other metals at levels above EPA’s risk-based cleanup levels. The residential area includes about 5,000 homes around the former facility. EPA issued a Record of Decision in April 2017 that selected remedies for all areas of the site. Cleanup in the residential area began in summer 2019, and EPA has cleaned up about 500 homes so far. Because the cleanup area is large, EPA expects the work to continue for several more years. EPA mailed residents information on safe gardening practices to help reduce exposure to contaminated soil. EPA expects human exposure to be under control by September 2037.