EPA Superfund site
OTTAWA RADIATION AREAS
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 August 2025, the Ottawa Radiation Areas Superfund site is considered "Current Human Exposures Not Under Control." The site includes sixteen areas of concern. Current human exposures are under control in fifteen areas. The one remaining area, NPL-8 (Frontage Property/Landfill), is designated as "Current Human Exposures Not Under Control" because of the potential for exposure via direct contact, ingestion and/or inhalation to trespassers, construction workers, and/or commercial/industrial workers to radium contaminated soils. The site received Infrastructure Investment and Jobs Act (IIJA) funds to complete the remedial action at this last area. The remedial action work is ongoing and is expected to be completed in 2029.