Site Plain EPA Superfund sites near you, in plain language

EPA Superfund Site

SOUTHWEST JEFFERSON COUNTY MINING

MO | EPA ID MON000705443

Human exposure is NOT currently under control

About this site’s exposure pathways: As of March 2024, the Southwest Jefferson County Mining Site is considered 'Current Human Exposure Not Under Control' because residents can be exposed through direct contact with lead contaminated soils, drinking water, sediments and mine waste at the Site. The planned activities to address these pathways include on-going sampling and remediation of residential yards, providing bottled water for residents with lead contaminated wells (ROD is under development), completion of an RI/FS and pilot projects related to lead contaminated sediments (NTCRA is under development), and completion of an RI/FS relating to lead contaminated mine waste (RI/FS is ongoing). EPA began cleaning up the lead contaminated residential soil in 2007 and residential yard remediation and removal actions for contaminated wells are ongoing. Work continues as thousands of properties remain untested and many properties still require remediation. Lead contaminated sediments and mine waste will be addressed under future actions but fish advisory notifications and signs at several public access points warn of the potential for lead exposure.

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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.

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